[go: up one dir, main page]

WO2013187145A1 - Phosphor light source device - Google Patents

Phosphor light source device Download PDF

Info

Publication number
WO2013187145A1
WO2013187145A1 PCT/JP2013/062474 JP2013062474W WO2013187145A1 WO 2013187145 A1 WO2013187145 A1 WO 2013187145A1 JP 2013062474 W JP2013062474 W JP 2013062474W WO 2013187145 A1 WO2013187145 A1 WO 2013187145A1
Authority
WO
WIPO (PCT)
Prior art keywords
phosphor
light
light source
source device
hologram element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/062474
Other languages
French (fr)
Japanese (ja)
Inventor
小田　史彦
晃彦 杉谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ushio Denki KK
Original Assignee
Ushio Denki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ushio Denki KK filed Critical Ushio Denki KK
Publication of WO2013187145A1 publication Critical patent/WO2013187145A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0019—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having reflective surfaces only (e.g. louvre systems, systems with multiple planar reflectors)
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/06—Colour photography, other than mere exposure or projection of a colour film by additive-colour projection apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer

Definitions

  • the present invention relates to a phosphor light source device that excites a phosphor with light emitted from a light source and emits light emitted from the phosphor. More specifically, the present invention relates to a phosphor light source device used as a light source for a projector device including a spatial modulation element such as a liquid crystal display device or a digital micromirror device.
  • the phosphor light source device excites a phosphor by light emitted from the light source and emits light emitted from the phosphor.
  • Examples of the light source for exciting the phosphor include a light emitting diode and a semiconductor laser.
  • a solid light source is used.
  • Such a phosphor light source device includes, for example, two excitation light sources and a phosphor that emits light when excited by light emitted from these excitation light sources.
  • region where the emitted light overlaps is known (refer patent document 1).
  • a phosphor is disposed in a band shape on the inner surface of the cylindrical member whose inner surface is a reflecting surface, and light emitted from the excitation light source is transmitted from the light incident port on the side surface of the cylindrical member into the cylindrical member.
  • a phosphor light source device having a structure in which a phosphor is excited by being incident on the light source and light emitted from the phosphor is emitted from an end surface of a cylindrical member (see Patent Document 2).
  • the phosphor light source device described in Patent Document 1 uses only light in the region where the light emitted from each of the two excitation light sources overlaps, the light emitted from the excitation light source is effectively used. Cannot be obtained, and sufficient luminous efficiency cannot be obtained. Therefore, when the phosphor light source device is used as a light source for a projector device, there is a problem that the amount of light is insufficient. Further, in the fluorescent light source device described in Patent Document 2, the fluorescence intensity distribution emitted from the tube end portion is not uniform. When used as a light source for a projector device, it is necessary to display the inside of a substantially rectangular image display device almost uniformly.
  • the fluorescence intensity distribution is, for example, Gaussian, and light around this distribution is effectively used. There is a problem that the efficiency of the optical system is lowered because the optical system cannot be used. In addition, the excitation light intensity distribution is not completely uniform, and the intensity thereof is increased, whereby there is a problem in that the fluorescence emission efficiency is likely to be locally lowered and the phosphor itself may be damaged.
  • the present invention has been made based on the above circumstances, and its object is to obtain a phosphor light source device capable of obtaining a high light output and emitting light having a uniform light intensity distribution. Is to provide.
  • the phosphor light source device of the present invention comprises a phosphor and an excitation light source that emits light that excites the phosphor, and is a phosphor light source device that emits light emitted from the phosphor,
  • the hologram element is a position where the light from the excitation light source is irradiated from the direction along the irradiation direction of the reference light used in manufacturing the hologram element, and a reproduced image recorded on the hologram element Is arranged at a position where it is generated on the phosphor,
  • the hologram element generates a reproduced image having a uniform light intensity distribution in a reproduced image region on the phosphor.
  • each of the reproduction images generated from each irradiation position on the hologram element of the laser light emitted from each of the excitation light sources comprises a plurality of excitation light sources, It is preferable that the fluorescent material is superposed on the incident surface.
  • the phosphor light source device of the present invention preferably includes an optical element that scans light emitted from the excitation light source on the light incident surface of the hologram element.
  • the phosphor light source device of the present invention includes a phosphor and a plurality of excitation light sources that emit light that excites the phosphor, and is a phosphor light source device that emits light emitted from the phosphor.
  • the plurality of hologram elements are positions where light emitted from the corresponding excitation light source is irradiated from the direction along the irradiation direction of the reference light used at the time of manufacturing the hologram element, and the hologram element It is arranged at a position where the recorded reproduced image is generated on the phosphor, Each of the reproduced images by the plurality of hologram elements is superimposed to generate a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor.
  • a configuration in which a reproduction image made of light that illuminates a rectangular area on the phosphor is recorded as the hologram element can be used.
  • a reproduction image is generated by irradiating the hologram element with light emitted from the excitation light source.
  • a reproduction image (hologram image) of the hologram element is used as excitation light of the phosphor, and a reproduction image having a uniform light intensity distribution in the reproduction image region on the phosphor is generated on the phosphor.
  • the phosphor can be efficiently excited to emit light, and light having a highly uniform light intensity distribution such as a top hat shape can be emitted. Can do.
  • the reproduced image by the hologram element that excites the phosphor has a uniform light intensity distribution, there is a problem that the luminous efficiency of the phosphor is locally reduced or the phosphor itself is worn out. It can be avoided.
  • the reproduced images generated from the respective irradiation positions on the hologram element of the laser light emitted from each of the plurality of excitation light sources are superimposed on the phosphor, and the synthesized reproduced image generated thereby is the phosphor. It is set as the structure used as excitation light. According to the phosphor light source device having such a configuration, even if each excitation light source has a small irradiation luminance with respect to the hologram element, the synthesized reproduction image generated on the phosphor has a sufficiently high luminance. It becomes. As a result, the amount of light emitted from the phosphor can be increased, a high light output can be obtained, and the thermal load on the hologram element can be reduced.
  • FIG. 1 is a diagram showing a schematic configuration in an example of the phosphor light source device of the present invention.
  • the phosphor light source device includes a laser light emitting mechanism 10 and a phosphor 30.
  • the phosphor 30 is excited by using the laser light emitted from the laser light emitting mechanism 10 to emit the phosphor 30.
  • the light emitted from is emitted.
  • the laser beam emitting mechanism 10 converts a plurality of laser light sources 11 constituting an excitation light source that emits light for exciting the phosphor 30 and light emitted at a predetermined divergence angle from the laser light source 11 into substantially parallel light.
  • a plurality of collimating lenses 12 are provided.
  • Each laser light source 11 is made of, for example, a semiconductor laser that emits laser beams having the same oscillation wavelength, and is arranged so that the optical axes of the emitted laser beams extend in parallel to each other.
  • Each collimator lens 12 is arranged in a state in which the optical axis coincides with the optical axis of the corresponding laser light source 11 at a position on the front side in the light emission direction of the corresponding laser light source 11.
  • the phosphor light source device includes, for example, a reflection-type hologram element 20 that generates a reproduction image (reproduces a hologram image) by laser light emitted from the laser light emission mechanism 10.
  • the hologram element 20 is disposed at a position where the laser light from each laser light source 11 is irradiated from the direction along the irradiation direction of the reference light used when the hologram element 20 is manufactured.
  • a reproduced image composed of light (image) that illuminates a predetermined area on the light incident surface of the phosphor 30 is recorded.
  • the reproduced image is not particularly limited.
  • the phosphor light source device is used as a light source for a projector device including a spatial modulation element, for example, a rectangular region on the light incident surface of the phosphor 30 is used. It is preferable that the light is illuminated. This is because the light incident surface of the spatial modulation element is usually rectangular.
  • Reproduced images H1, H2, and H3 generated from the irradiation positions L1, L2, and L3 of the laser beam on the hologram element 20 have a uniform light intensity distribution in the reconstructed image region on the phosphor 30, and are fluorescent. It is generated at the same position on the light incident surface of the body 30.
  • the reproduced images H1, H2, and H3 are superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor 30.
  • “uniform” light intensity distribution means that the intensity distribution (variation) with respect to the average intensity is within ⁇ 10%.
  • a phosphor 30 that emits light when excited by the combined reproduction image (excitation light) is disposed at the position where the combined reproduction image is formed by the hologram element 20.
  • the phosphor 30 is preferably provided with a cooling means.
  • a cooling means for example, a heat sink can be used, and the heat sink is provided in contact with the surface of the phosphor 30 opposite to the light incident surface. With such a configuration, it is possible to prevent the phosphor 30 from being overheated and to suppress damage or deterioration (deterioration) of the function of the phosphor 30.
  • the laser light emitted from each laser light source 11 is converted into parallel light by the collimator lens 12 and applied to the hologram element 20.
  • the light distribution characteristic of the laser light incident on the hologram element 20 has, for example, a Gaussian distribution in which a portion having the highest light intensity exists in the central portion.
  • reproduced images generated from the laser light irradiation positions L1, L2, and L3 on the hologram element 20 are generated on the light incident surface of the phosphor 30, and the reproduced images H1, H2, and H3 are generated on the phosphor 30.
  • a composite reproduction image is formed by superimposing the image on the top.
  • the light intensity distribution of the combined reproduction image formed on the phosphor 30 has, for example, a top hat shape (uniform light intensity distribution). Then, the phosphor 30 is excited by the synthesized reproduction image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on the axis C1 perpendicular to the light incident surface of the phosphor 30 (uniform light distribution). (Distribution characteristics).
  • the light emitted from the phosphor light source device can be utilized by, for example, making it parallel light by the convex lens 45.
  • H3 is superimposed on the phosphor 30, and a synthesized reproduction image formed thereby is used as excitation light for the phosphor 30.
  • the phosphor light source device configured as described above can efficiently excite the phosphor 30 to emit light. Light having a highly uniform light intensity distribution such as a top hat shape can be emitted.
  • the composite reproduction image by the hologram element 20 that excites the phosphor 30 has a uniform light intensity distribution, the luminous efficiency of the phosphor 30 is locally reduced or the phosphor 30 itself is worn out. Can be avoided. Further, even if each laser light source 11 has a low irradiation luminance of the laser beam to the hologram element 20, the synthesized reproduction image generated on the phosphor 30 has a sufficiently high luminance. As a result, the amount of light emitted from the phosphor 30 can be increased, a high light output can be obtained, and the thermal load on the hologram element 20 can be reduced.
  • the excitation light source is not limited to a laser light source made of a semiconductor laser, and a lamp light source, an LED, or the like may be used, and the number thereof is not particularly limited.
  • the excitation light source may be configured by combining a multi-emitter semiconductor laser and a collimation mechanism using a microlens.
  • a plurality of hologram elements corresponding to each of the plurality of excitation light sources may be provided.
  • each hologram element does not have to generate a reproduced image having a uniform light intensity distribution, and the intensity of the reproduced image by each hologram element is compensated for each other to obtain a phosphor.
  • the hologram element may be configured to use a transmission type element that generates a reproduced image on the opposite side of the light incident surface.
  • the hologram element is exemplified as a configuration in which a parallel beam is irradiated. However, a convergent beam including light in a direction along the optical path of the reference light used in manufacturing the hologram element is applied to the hologram element.
  • the incident optical system to the hologram has various configurations such as a configuration of condensing by a mirror as well as a lens.
  • a phosphor cooling means for example, a method of mechanically moving (for example, rotating) the phosphor itself and changing the position where the reproduced image is irradiated with time is also effective.
  • FIG. 2 is a diagram showing a schematic configuration in another example of the phosphor light source device of the present invention.
  • a hologram element is used to transmit a reconstructed image on the opposite side of the laser light incident surface, instead of a reflection type that generates a reconstructed image on the laser light incident surface.
  • the type is used.
  • the laser beam emitting mechanism 10 includes a plurality of (for example, nine) laser light sources 11 constituting an excitation light source that emits light that excites the phosphors 30 and light emitted from the laser light source 11 at a predetermined divergence angle.
  • a plurality of collimating lenses 12 for substantially parallel light are provided.
  • Each laser light source 11 is made of, for example, a semiconductor laser that emits laser beams having the same oscillation wavelength, and is arranged so that the optical axes of the emitted laser beams extend in parallel to each other.
  • Each collimator lens 12 is arranged at a position on the front side in the light emission direction of the corresponding laser light source 11 so that the optical axis coincides with the optical axis of the corresponding laser light source.
  • the phosphor light source device in this example includes a transmissive hologram element 21 that generates a reproduced image by laser light emitted from the laser light emitting mechanism 10.
  • the hologram element 21 is arranged at a position where the laser light from each laser light source 11 is irradiated from the direction along the irradiation direction of the reference light used when the hologram element 21 is manufactured.
  • the hologram element 21 records a reproduction image made of light that illuminates a predetermined area, for example, a rectangular area, on the light incident surface of the phosphor 30.
  • Each reproduced image generated from each irradiation position of the laser beam on the hologram element 21 has a uniform light intensity distribution in the reproduced image region X on the phosphor 30, and is the same on the light incident surface of the phosphor 30. Is generated at the position. That is, each reproduced image is superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region X on the phosphor 30.
  • FIG. 2 for easy understanding, only the reproduced images Ha and Hi generated from the two laser light irradiation positions La and Li in the hologram element 21 are shown by broken lines.
  • a phosphor 30 that emits light when excited by the combined reproduction image is disposed at the position where the combined reproduction image is formed by the hologram element 21.
  • the phosphor 30 in this example is configured, for example, by forming a phosphor film in an annular shape (ring shape) on one surface of a disc-shaped translucent substrate 31 (in FIG. The body membrane is hatched.)
  • the translucent substrate 31 is rotationally driven around a central axis (axis perpendicular to the translucent substrate 31) C2 of the translucent substrate 31 by a driving mechanism (not shown).
  • the rotational speed of the translucent substrate 31 is, for example, 60 rpm.
  • the laser light emitted from each laser light source 11 is converted into parallel light by the collimator lens 12 and irradiated onto the hologram element 21.
  • each reproduction image generated from each irradiation position of the laser beam on the hologram element 21 is superimposed at a predetermined position of the phosphor 30 formed on one surface of the translucent substrate 31 to be rotationally driven, A composite reproduction image is formed.
  • the phosphor 30 is excited by the synthesized reproduction image to emit light, and the fluorescence is distributed in a light distribution distribution characteristic (uniform light distribution distribution) having an approximately Lambertian distribution centered on an axis perpendicular to the light incident surface of the phosphor 30.
  • the light is emitted from the other surface side of the translucent substrate 31.
  • the light emitted from the phosphor light source device can be used by making it parallel light by a convex lens, for example, as in the phosphor light source device shown in FIG. Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained.
  • FIG. 3 is a diagram showing a schematic configuration in still another example of the phosphor light source device of the present invention.
  • This phosphor light source device is a phosphor light source device having the configuration shown in FIG. 2, as an incident optical system for the hologram element 21, from a focusing lens 15 that focuses light emitted from the laser light emitting mechanism 10 and each laser light source 11.
  • 2 has the same configuration as that of the phosphor light source device shown in FIG. 2 except that it further includes an optical element that scans the light on the light incident surface of the hologram element 21.
  • the same components as those of the phosphor light source device shown in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.
  • a pair of scan mirrors 40A and 40B each composed of a galvanometer scanner is used as an optical element for scanning the light emitted from each laser light source 11 on the light incident surface of the hologram element 21.
  • One scan mirror 40 ⁇ / b> A swings so that the light spot of the laser beam focused by the focusing lens 15 is scanned in one direction on the light incident surface of the hologram element 21 at the laser beam focusing position by the focusing lens 15. It is provided as possible.
  • the other scan mirror 40B is swingably provided so that the light spot of the laser beam from one scan mirror 40A is scanned in the other direction perpendicular to the one direction on the light incident surface of the hologram element 20A.
  • the oscillation center axes C3 and C4 of the scan mirrors 40A and 40B are set to extend in directions orthogonal to each other.
  • the laser light emitted from the laser light emitting mechanism 10 is converged by the converging lens 15 and sequentially incident on the pair of scan mirrors 40A and 40B.
  • the laser light emitted from each laser light source 11 is applied to the same position on the light incident surface of the hologram element 21 and the laser is emitted. Scanning is performed so that the light spot of light changes in time on a light incident surface of the hologram element 21 while drawing a two-dimensional locus.
  • a reproduced image generated from the irradiation position of the laser beam on the hologram element 21 is generated at a predetermined position of the phosphor formed on one surface of the translucent substrate 31 that is rotationally driven.
  • the reproduced image by the hologram element 21 is generated at the same position in the circumferential direction on the phosphor 30 regardless of the irradiation position of the laser beam.
  • the phosphor 30 is excited by the reproduced image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on an axis perpendicular to the light incident surface of the phosphor 30 (uniform light distribution characteristic). ) From the other surface side of the translucent substrate 31.
  • the emitted light can be used by making it parallel light by a convex lens, for example, as in the fluorescent light source device shown in FIG. Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained, and the thermal load due to the beam concentration on the hologram element 21 can be reduced.
  • FIG. 4 is a diagram showing a schematic configuration in still another example of the phosphor light source device of the present invention.
  • This phosphor light source device is configured such that a plurality of hologram elements 20A, 20B, and 20C corresponding to each of the plurality of laser light sources 11 are provided in the phosphor light source device having the configuration shown in FIG.
  • Each hologram element 20A, 20B, 20C generates reproduction images H1, H2, H3 having a predetermined light intensity distribution in the reproduction image region on the phosphor 30.
  • Each hologram element 20A, 20B, 20C has a laser beam emitted from the corresponding laser light source 11 in the laser beam emission mechanism 10 along the irradiation direction of the reference light used when manufacturing the hologram elements 20A, 20B, 20C. It is arranged at the position irradiated from the direction.
  • Each of the hologram elements 20A, 20B, and 20C is arranged so that the reproduced images H1, H2, and H3 are superimposed on the phosphor 30.
  • each hologram element 20A, 20B, 20C is irradiated with the laser light emitted from each laser light source 11 as parallel light by the collimating lens 12 and thereby irradiated to each hologram element.
  • Reproduced images H1, H2, and H3 recorded on 20A, 20B, and 20C are reproduced.
  • the reproduced images H1, H2, and H3 are superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor 30.
  • the intensity distribution of the laser light (synthetic reconstructed image) incident on the phosphor has a top hat shape (uniform intensity distribution), for example, as the intensity distribution of each reconstructed image H1, H2, H3 is mutually compensated. It will be a thing.
  • the phosphor 30 is excited by the synthesized reproduction image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on the axis C1 perpendicular to the light incident surface of the phosphor 30 (uniform light distribution). (Distribution characteristics).
  • the light emitted from this phosphor light source device can be utilized by making it parallel light by a convex lens 45, for example. Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained.
  • the phosphor light source device of the present invention can emit light having a uniform light intensity distribution with high light output, it is useful as a light source device for a projector device.
  • a projector apparatus equipped with the phosphor light source device of the present invention will be described.
  • FIG. 5 is a diagram showing an outline of a configuration in an example of a projector device on which the phosphor light source device of the present invention is mounted.
  • the projector device includes a first color light source unit 50R, a second color light source unit 50G, a third color light source unit 50B, a color light R from the first color light source unit 50R, and a second color light source unit 50G.
  • the color light G and the color light B from the third color light source 50B are combined to emit the combined light W, and the combined light W from the color composite optical member 60 is incident to generate the optical image P.
  • a spatial modulation element 70 to be emitted and a combined light image projection mechanism 80 made of a projection lens for enlarging and projecting the light image P onto the screen S are provided.
  • the first color light source unit 50R includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a first laser light source that emits color light R (for example, red light) as an excitation light source.
  • the second color light source unit 50G includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a second laser light source that emits color light G (for example, green light) as an excitation light source.
  • the third color light source unit 50B includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a third laser light source that emits color light B (for example, blue light) as an excitation light source. .
  • the color combining optical member 60 is an intersection of the optical path of the colored light R from the first colored light source 50R, the optical path of the colored light G from the second colored light source 50G, and the optical path of the colored light B from the third colored light source 50B. Is arranged.
  • a color synthesis optical member 60 for example, a color synthesis prism such as a dichroic prism can be used.
  • the spatial modulation element 70 in this example for example, a transmission type element is used, and is arranged on the optical path of the synthesized light W from the color synthesizing optical member 60.
  • the color light R from the first color light source unit 50R, the color light G from the second color light source unit 50G, and the color light B from the third color light source unit 50B are incident on the color combining optical member 60. Then, the combined light W is emitted after being combined by the color combining optical member 60. The combined light W from the color combining optical member 60 is incident on the spatial modulation element 70, and the light image P formed by being modulated by the spatial modulation element 70 is enlarged on the screen S via the combined light image projection mechanism 80. Projected.
  • each of the color light source units 50R, 50G, and 50B includes the phosphor light source device, so that the phosphor light source device outputs light having a uniform light intensity distribution with a high light output. Therefore, it is possible to project a high-luminance image.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

蛍光体光源装置Phosphor light source device

　本発明は、光源より出射される光によって蛍光体を励起させて当該蛍光体から発せられる光を出射する蛍光体光源装置に関する。更に詳しくは、本発明は、例えば、液晶表示デバイスやデジタルマイクロミラーデバイスなどの空間変調素子を具えたプロジェクタ装置用の光源として用いられる蛍光体光源装置に関する。 The present invention relates to a phosphor light source device that excites a phosphor with light emitted from a light source and emits light emitted from the phosphor. More specifically, the present invention relates to a phosphor light source device used as a light source for a projector device including a spatial modulation element such as a liquid crystal display device or a digital micromirror device.

　近年、プロジェクタ装置用の光源として蛍光体光源装置を利用する技術の研究が進められている。蛍光体光源装置は、光源より出射される光によって蛍光体を励起させて当該蛍光体から発せられる光を出射するものであり、蛍光体の励起用光源としては、例えば発光ダイオードや半導体レーザなどの固体光源が用いられる。 In recent years, research on technology using a phosphor light source device as a light source for a projector device has been advanced. The phosphor light source device excites a phosphor by light emitted from the light source and emits light emitted from the phosphor. Examples of the light source for exciting the phosphor include a light emitting diode and a semiconductor laser. A solid light source is used.

　このような蛍光体光源装置としては、例えば、２つの励起用光源と、これらの励起用光源より出射される光によって励起されて発光する蛍光体とを具え、蛍光体が各々の励起用光源より出射される光が重なる領域にのみ設置された構成のものが知られている（特許文献１参照。）。
　また、例えば、内面が反射面とされた筒状部材の内面に帯状に蛍光体が配置されてなり、励起用光源より出射される光を筒状部材の側面の光入射口から筒状部材内に入射させて蛍光体を励起させ、蛍光体から発せられる光を筒状部材の端面より出射させる構造の蛍光体光源装置が知られている（特許文献２参照。）。 Such a phosphor light source device includes, for example, two excitation light sources and a phosphor that emits light when excited by light emitted from these excitation light sources. The thing of the structure installed only in the area | region where the emitted light overlaps is known (refer patent document 1).
Further, for example, a phosphor is disposed in a band shape on the inner surface of the cylindrical member whose inner surface is a reflecting surface, and light emitted from the excitation light source is transmitted from the light incident port on the side surface of the cylindrical member into the cylindrical member. There is known a phosphor light source device having a structure in which a phosphor is excited by being incident on the light source and light emitted from the phosphor is emitted from an end surface of a cylindrical member (see Patent Document 2).

特開２０１１－１６５５４７号公報JP 2011-165547 A 特開２０１１－２５３７４９号公報JP 2011-253749 A

　ところが、特許文献１に記載の蛍光体光源装置では、２つの励起用光源の各々から放射される光が重なる領域内の光のみを利用するため、励起用光源より出射される光を有効に利用することができず、十分な発光効率を得ることができない。従って、当該蛍光体光源装置がプロジェクタ装置用の光源として利用される場合には光量が不十分である、といった問題があった。
　また、特許文献２に記載の蛍光光源装置では、筒端部から出射する蛍光強度分布は、均一なものとはならない。プロジェクタ装置用の光源として利用する場合は、略矩形の画像表示デバイス内をほぼ均一に表示する必要があるが、蛍光強度分布は、例えば、ガウシアン状となり、この分布の周囲部の光は有効に利用できず、光学系の効率が低くなる、といった問題があった。更には、励起光強度分布が完全には均一にならず強弱が生じることによって、蛍光の発光効率が局所的に低下しやすく、また蛍光体自体が損傷するおそれがある、といった問題があった。 However, since the phosphor light source device described in Patent Document 1 uses only light in the region where the light emitted from each of the two excitation light sources overlaps, the light emitted from the excitation light source is effectively used. Cannot be obtained, and sufficient luminous efficiency cannot be obtained. Therefore, when the phosphor light source device is used as a light source for a projector device, there is a problem that the amount of light is insufficient.
Further, in the fluorescent light source device described in Patent Document 2, the fluorescence intensity distribution emitted from the tube end portion is not uniform. When used as a light source for a projector device, it is necessary to display the inside of a substantially rectangular image display device almost uniformly. However, the fluorescence intensity distribution is, for example, Gaussian, and light around this distribution is effectively used. There is a problem that the efficiency of the optical system is lowered because the optical system cannot be used. In addition, the excitation light intensity distribution is not completely uniform, and the intensity thereof is increased, whereby there is a problem in that the fluorescence emission efficiency is likely to be locally lowered and the phosphor itself may be damaged.

　本発明は、以上のような事情に基づいてなされたものであって、その目的は、高い光出力を得ることができると共に均一な光強度分布を有する光を出射することのできる蛍光体光源装置を提供することにある。 The present invention has been made based on the above circumstances, and its object is to obtain a phosphor light source device capable of obtaining a high light output and emitting light having a uniform light intensity distribution. Is to provide.

　本発明の蛍光体光源装置は、蛍光体と、当該蛍光体を励起させる光を出射する励起用光源とを具備し、当該蛍光体から発せられる光が出射される蛍光体光源装置であって、
　ホログラム素子が、前記励起用光源よりの光が当該ホログラム素子の製造時に用いられた参照光の照射方向に沿った方向より照射される位置であって、かつ、当該ホログラム素子に記録された再生像が前記蛍光体上に生成される位置に、配置されており、
　当該ホログラム素子は、前記蛍光体上の再生像領域内における光強度分布が均一な再生像を生成するものであることを特徴とする。 The phosphor light source device of the present invention comprises a phosphor and an excitation light source that emits light that excites the phosphor, and is a phosphor light source device that emits light emitted from the phosphor,
The hologram element is a position where the light from the excitation light source is irradiated from the direction along the irradiation direction of the reference light used in manufacturing the hologram element, and a reproduced image recorded on the hologram element Is arranged at a position where it is generated on the phosphor,
The hologram element generates a reproduced image having a uniform light intensity distribution in a reproduced image region on the phosphor.

　本発明の蛍光体光源装置においては、複数の励起用光源を具えており、当該各々の励起用光源より出射されるレーザ光の前記ホログラム素子上の各照射位置から発生する再生像の各々が、前記蛍光体の入射面において重ね合わせられる構成とされていることが好ましい。 In the phosphor light source device of the present invention, each of the reproduction images generated from each irradiation position on the hologram element of the laser light emitted from each of the excitation light sources comprises a plurality of excitation light sources, It is preferable that the fluorescent material is superposed on the incident surface.

　また、本発明の蛍光体光源装置においては、前記励起用光源より出射される光を前記ホログラム素子の入光面上において走査させる光学素子を具えた構成とされていることが好ましい。 The phosphor light source device of the present invention preferably includes an optical element that scans light emitted from the excitation light source on the light incident surface of the hologram element.

　本発明の蛍光体光源装置は、蛍光体と、当該蛍光体を励起させる光を出射する複数の励起用光源とを具備し、当該蛍光体から発せられる光が出射される蛍光体光源装置であって、
　複数のホログラム素子が、対応する励起用光源より出射される光が当該ホログラム素子の製造時に用いられた参照光の照射方向に沿った方向より照射される位置であって、かつ、当該ホログラム素子に記録された再生像が前記蛍光体上に生成される位置に、配置されており、
　前記複数のホログラム素子による再生像の各々が重ね合わせられて、前記蛍光体上の再生像領域内における光強度分布が均一な合成再生像が生成されることを特徴とする。 The phosphor light source device of the present invention includes a phosphor and a plurality of excitation light sources that emit light that excites the phosphor, and is a phosphor light source device that emits light emitted from the phosphor. And
The plurality of hologram elements are positions where light emitted from the corresponding excitation light source is irradiated from the direction along the irradiation direction of the reference light used at the time of manufacturing the hologram element, and the hologram element It is arranged at a position where the recorded reproduced image is generated on the phosphor,
Each of the reproduced images by the plurality of hologram elements is superimposed to generate a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor.

　本発明の蛍光体光源装置においては、前記ホログラム素子として、前記蛍光体上の矩形領域を照明する光よりなる再生像が記録されたものが用いられた構成とすることができる。 In the phosphor light source device of the present invention, a configuration in which a reproduction image made of light that illuminates a rectangular area on the phosphor is recorded as the hologram element can be used.

　本発明の蛍光体光源装置においては、励起用光源より出射される光がホログラム素子に照射されることにより再生像が生成される。そして、このホログラム素子の再生像（ホログラム像）が蛍光体の励起光として用いられ、蛍光体上の再生像領域内における光強度分布が均一な再生像が当該蛍光体上に生成される構成とされている。従って、本発明の蛍光体光源装置によれば、蛍光体を効率よく励起させて発光させることができ、しかも、例えばトップハット形状のような均一性の高い光強度分布を有する光を放射することができる。また、蛍光体を励起させるホログラム素子による再生像が均一な光強度分布を有するものであることにより、蛍光体の発光効率が局所的に低下したり、蛍光体自体が損耗したりするといった問題が生ずることを回避することができる。 In the phosphor light source device of the present invention, a reproduction image is generated by irradiating the hologram element with light emitted from the excitation light source. A reproduction image (hologram image) of the hologram element is used as excitation light of the phosphor, and a reproduction image having a uniform light intensity distribution in the reproduction image region on the phosphor is generated on the phosphor. Has been. Therefore, according to the phosphor light source device of the present invention, the phosphor can be efficiently excited to emit light, and light having a highly uniform light intensity distribution such as a top hat shape can be emitted. Can do. Further, since the reproduced image by the hologram element that excites the phosphor has a uniform light intensity distribution, there is a problem that the luminous efficiency of the phosphor is locally reduced or the phosphor itself is worn out. It can be avoided.

　また、複数の励起用光源の各々から出射されるレーザ光のホログラム素子上の各照射位置より生成される各再生像が蛍光体上において重ね合わせられ、これにより生成される合成再生像が蛍光体の励起光として用いられる構成とされている。このような構成の蛍光体光源装置によれば、個々の励起用光源がホログラム素子に対する照射輝度が小さいものであっても、蛍光体上に生成される合成再生像は十分に高い輝度を有するものとなる。これにより、蛍光体より放射される光の光量を多くすることができて高い光出力を得ることができ、しかも、ホログラム素子に対する熱負荷を低減することができる。 In addition, the reproduced images generated from the respective irradiation positions on the hologram element of the laser light emitted from each of the plurality of excitation light sources are superimposed on the phosphor, and the synthesized reproduced image generated thereby is the phosphor. It is set as the structure used as excitation light. According to the phosphor light source device having such a configuration, even if each excitation light source has a small irradiation luminance with respect to the hologram element, the synthesized reproduction image generated on the phosphor has a sufficiently high luminance. It becomes. As a result, the amount of light emitted from the phosphor can be increased, a high light output can be obtained, and the thermal load on the hologram element can be reduced.

本発明の蛍光体光源装置の一例における構成の概略を示す図である。It is a figure which shows the outline of a structure in an example of the fluorescent substance light source device of this invention. 本発明の蛍光体光源装置の他の例における構成の概略を示す図である。It is a figure which shows the outline of a structure in the other example of the fluorescent substance light source device of this invention. 本発明の蛍光体光源装置のさらに他の例における構成の概略を示す図である。It is a figure which shows the outline of a structure in the further another example of the fluorescent substance light source device of this invention. 本発明の蛍光体光源装置のさらに他の例における構成の概略を示す図である。It is a figure which shows the outline of a structure in the further another example of the fluorescent substance light source device of this invention. 本発明の蛍光体光源装置が搭載されたプロジェクタ装置の一例における構成の概略を示す図である。It is a figure which shows the outline of a structure in an example of the projector apparatus by which the fluorescent substance light source device of this invention is mounted.

　以下、本発明の実施の形態について詳細に説明する。
　図１は、本発明の蛍光体光源装置の一例における構成の概略を示す図である。この蛍光体光源装置は、レーザ光出射機構１０と、蛍光体３０とを具えており、このレーザ光出射機構１０より出射されるレーザ光を利用して蛍光体３０を励起させて当該蛍光体３０から発せられる光を出射するものである。 Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a diagram showing a schematic configuration in an example of the phosphor light source device of the present invention. The phosphor light source device includes a laser light emitting mechanism 10 and a phosphor 30. The phosphor 30 is excited by using the laser light emitted from the laser light emitting mechanism 10 to emit the phosphor 30. The light emitted from is emitted.

　レーザ光出射機構１０は、各々蛍光体３０を励起させる光を出射する励起用光源を構成する複数のレーザ光源１１と、レーザ光源１１より所定の拡がり角で出射される光を略平行光とする複数のコリメートレンズ１２とを具えている。
　各々のレーザ光源１１は、例えば互いに同一の発振波長のレーザ光を出射する半導体レーザよりなり、出射されるレーザ光の光軸が互いに平行に延びるよう配置されている。
　各々のコリメートレンズ１２は、対応するレーザ光源１１の光出射方向前方側の位置において、光軸が対応するレーザ光源１１の光軸と一致する状態で配置されている。 The laser beam emitting mechanism 10 converts a plurality of laser light sources 11 constituting an excitation light source that emits light for exciting the phosphor 30 and light emitted at a predetermined divergence angle from the laser light source 11 into substantially parallel light. A plurality of collimating lenses 12 are provided.
Each laser light source 11 is made of, for example, a semiconductor laser that emits laser beams having the same oscillation wavelength, and is arranged so that the optical axes of the emitted laser beams extend in parallel to each other.
Each collimator lens 12 is arranged in a state in which the optical axis coincides with the optical axis of the corresponding laser light source 11 at a position on the front side in the light emission direction of the corresponding laser light source 11.

　この蛍光体光源装置は、レーザ光出射機構１０より出射されるレーザ光により再生像を生成（ホログラム像を再生）する例えば反射型のホログラム素子２０を具えている。ホログラム素子２０は、各々のレーザ光源１１よりのレーザ光が当該ホログラム素子２０の製造時に用いられた参照光の照射方向に沿った方向より照射される位置に配置されている。
　ホログラム素子２０には、例えば蛍光体３０の入光面上の所定領域を照明する光（像）により構成された再生像（ホログラム像）が記録されている。再生像としては、特に限定されるものではないが、蛍光体光源装置が例えば空間変調素子を具えたプロジェクタ装置用の光源として用いられる場合には、蛍光体３０の入光面上の矩形領域を照明する光により構成されていることが好ましい。この理由は、空間変調素子の入光面が通常矩形形状とされているためである。
　ホログラム素子２０におけるレーザ光の各照射位置Ｌ１，Ｌ２，Ｌ３から発生する各再生像Ｈ１，Ｈ２，Ｈ３は、蛍光体３０上の再生像領域内における光強度分布が均一であるものであり、蛍光体３０の入光面上の同一の位置に生成される。すなわち、各再生像Ｈ１，Ｈ２，Ｈ３は、蛍光体３０上において重畳されて蛍光体３０上の再生像領域内における光強度分布が均一な合成再生像を形成する。
　本発明において、光強度分布が「均一」とは、平均強度に対する強度分布（バラツキ）が±１０％以内であることをいう。 The phosphor light source device includes, for example, a reflection-type hologram element 20 that generates a reproduction image (reproduces a hologram image) by laser light emitted from the laser light emission mechanism 10. The hologram element 20 is disposed at a position where the laser light from each laser light source 11 is irradiated from the direction along the irradiation direction of the reference light used when the hologram element 20 is manufactured.
In the hologram element 20, for example, a reproduced image (hologram image) composed of light (image) that illuminates a predetermined area on the light incident surface of the phosphor 30 is recorded. The reproduced image is not particularly limited. However, when the phosphor light source device is used as a light source for a projector device including a spatial modulation element, for example, a rectangular region on the light incident surface of the phosphor 30 is used. It is preferable that the light is illuminated. This is because the light incident surface of the spatial modulation element is usually rectangular.
Reproduced images H1, H2, and H3 generated from the irradiation positions L1, L2, and L3 of the laser beam on the hologram element 20 have a uniform light intensity distribution in the reconstructed image region on the phosphor 30, and are fluorescent. It is generated at the same position on the light incident surface of the body 30. That is, the reproduced images H1, H2, and H3 are superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor 30.
In the present invention, “uniform” light intensity distribution means that the intensity distribution (variation) with respect to the average intensity is within ± 10%.

　ホログラム素子２０による合成再生像の形成位置には、合成再生像（励起光）により励起されて発光する蛍光体３０が配置されている。
　蛍光体３０には、冷却手段が設けられていることが好ましい。冷却手段としては、例えばヒートシンクを用いることができ、当該ヒートシンクは、蛍光体３０における入光面と反対側の面に接触させて設けられる。このような構成とされていることにより、蛍光体３０が過熱状態となることを防止することができて蛍光体３０の損傷または機能低下（劣化）を抑制することができる。 A phosphor 30 that emits light when excited by the combined reproduction image (excitation light) is disposed at the position where the combined reproduction image is formed by the hologram element 20.
The phosphor 30 is preferably provided with a cooling means. As the cooling means, for example, a heat sink can be used, and the heat sink is provided in contact with the surface of the phosphor 30 opposite to the light incident surface. With such a configuration, it is possible to prevent the phosphor 30 from being overheated and to suppress damage or deterioration (deterioration) of the function of the phosphor 30.

　上記の蛍光体光源装置においては、各々のレーザ光源１１より出射されるレーザ光がコリメートレンズ１２によって平行光とされてホログラム素子２０に照射される。ここに、ホログラム素子２０に入射されるレーザ光の配光分布特性は、例えば中央部分に最も光強度の高い部位が存在するガウシアン分布を有する。これにより、ホログラム素子２０上のレーザ光の各照射位置Ｌ１，Ｌ２，Ｌ３から発生する再生像が蛍光体３０の入光面上に生成され、各再生像Ｈ１，Ｈ２，Ｈ３は、蛍光体３０上において重畳されて合成再生像を形成する。ここに、蛍光体３０上に形成される合成再生像の光強度分布は、例えばトップハット形状（均一な光強度分布）を有する。そして、合成再生像により蛍光体３０が励起されて発光し、当該蛍光が、蛍光体３０の入光面に垂直な軸Ｃ１を中心とする概略ランバーシアン分布の配光分布特性（均一な配光分布特性）にて放射される。この蛍光体光源装置より出射される光は、例えば凸レンズ４５によって平行光化するなどして利用することができる。 In the phosphor light source device described above, the laser light emitted from each laser light source 11 is converted into parallel light by the collimator lens 12 and applied to the hologram element 20. Here, the light distribution characteristic of the laser light incident on the hologram element 20 has, for example, a Gaussian distribution in which a portion having the highest light intensity exists in the central portion. As a result, reproduced images generated from the laser light irradiation positions L1, L2, and L3 on the hologram element 20 are generated on the light incident surface of the phosphor 30, and the reproduced images H1, H2, and H3 are generated on the phosphor 30. A composite reproduction image is formed by superimposing the image on the top. Here, the light intensity distribution of the combined reproduction image formed on the phosphor 30 has, for example, a top hat shape (uniform light intensity distribution). Then, the phosphor 30 is excited by the synthesized reproduction image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on the axis C1 perpendicular to the light incident surface of the phosphor 30 (uniform light distribution). (Distribution characteristics). The light emitted from the phosphor light source device can be utilized by, for example, making it parallel light by the convex lens 45.

　而して、上記構成の蛍光体光源装置においては、複数のレーザ光源１１の各々から出射されるレーザ光のホログラム素子２０上の各照射位置Ｌ１，Ｌ２，Ｌ３から発生する再生像Ｈ１，Ｈ２，Ｈ３が蛍光体３０上において重ね合わされ、これにより形成される合成再生像が蛍光体３０の励起光として用いられる。そして、合成再生像の再生像領域内における光強度分布が均一であることにより、上記構成の蛍光体光源装置によれば、蛍光体３０を効率よく励起させて発光させることができ、しかも、例えばトップハット形状のような均一性の高い光強度分布を有する光を放射することができる。また、蛍光体３０を励起させるホログラム素子２０による合成再生像が均一な光強度分布を有するものであることにより、蛍光体３０の発光効率が局所的に低下したり、蛍光体３０自体が損耗したりするといった問題が生ずることを回避することができる。
　また、個々のレーザ光源１１がホログラム素子２０に対するレーザ光の照射輝度が小さいものであっても、蛍光体３０上に生成される合成再生像は十分に高い輝度を有するものとなる。これにより、蛍光体３０より放射される光の光量を多くすることができて高い光出力を得ることができ、しかも、ホログラム素子２０に対する熱負荷を低減することができる。 Thus, in the phosphor light source device having the above-described configuration, the reproduced images H1, H2, and H2 generated from the irradiation positions L1, L2, and L3 on the hologram element 20 of the laser light emitted from each of the plurality of laser light sources 11, respectively. H3 is superimposed on the phosphor 30, and a synthesized reproduction image formed thereby is used as excitation light for the phosphor 30. Further, since the light intensity distribution in the reconstructed image region of the composite reconstructed image is uniform, the phosphor light source device configured as described above can efficiently excite the phosphor 30 to emit light. Light having a highly uniform light intensity distribution such as a top hat shape can be emitted. Further, since the composite reproduction image by the hologram element 20 that excites the phosphor 30 has a uniform light intensity distribution, the luminous efficiency of the phosphor 30 is locally reduced or the phosphor 30 itself is worn out. Can be avoided.
Further, even if each laser light source 11 has a low irradiation luminance of the laser beam to the hologram element 20, the synthesized reproduction image generated on the phosphor 30 has a sufficiently high luminance. As a result, the amount of light emitted from the phosphor 30 can be increased, a high light output can be obtained, and the thermal load on the hologram element 20 can be reduced.

　以上、本発明の実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、種々の変更を加えることができる。
　例えば、励起用光源としては、半導体レーザよりなるレーザ光源に限定されるものではなく、ランプ光源やＬＥＤなどが用いられてもよく、また、その数も特に制限されるものではない。また、励起用光源は、マルチエミッター半導体レーザとマイクロレンズによるコリメーション機構とが組み合わせられて構成されたものであってもよい。
　また、本発明の蛍光体光源装置においては、例えば複数の励起用光源の各々に対応する複数のホログラム素子が設けられた構成とされていてもよい。このような構成のものにおいては、各々のホログラム素子は、均一な光強度分布を有する再生像を生成するものである必要はなく、各々のホログラム素子による再生像の強度が互いに補償されて蛍光体上で生成される合成再生像が均一な光強度分布を有するものとなるよう構成されていればよい。また、ホログラム素子として、再生像を入光面の反対面側に生成する透過型のものが用いられた構成とされていてもよい。さらにまた、ホログラム素子に平行ビームが照射される構成のものを例に挙げたが、ホログラム素子の製造時に用いられた参照光の光路に沿った方向の光が含まれる収束ビーム等がホログラム素子に照射される構成とされていてもよい。また、ホログラムへの入射光学系は、レンズのみならず、ミラーによって集光する構成など種々の構成とすることが考えられる。
　蛍光体の冷却手段としては、例えば蛍光体自体を機械的に動かし（例えば回転させ）再生像が照射される位置を時間的に変化させる方法も有効である。 As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be added.
For example, the excitation light source is not limited to a laser light source made of a semiconductor laser, and a lamp light source, an LED, or the like may be used, and the number thereof is not particularly limited. The excitation light source may be configured by combining a multi-emitter semiconductor laser and a collimation mechanism using a microlens.
In the phosphor light source device of the present invention, for example, a plurality of hologram elements corresponding to each of the plurality of excitation light sources may be provided. In such a configuration, each hologram element does not have to generate a reproduced image having a uniform light intensity distribution, and the intensity of the reproduced image by each hologram element is compensated for each other to obtain a phosphor. What is necessary is just to be comprised so that the synthetic | combination reproduction | regeneration image produced | generated above may have a uniform light intensity distribution. The hologram element may be configured to use a transmission type element that generates a reproduced image on the opposite side of the light incident surface. Furthermore, the hologram element is exemplified as a configuration in which a parallel beam is irradiated. However, a convergent beam including light in a direction along the optical path of the reference light used in manufacturing the hologram element is applied to the hologram element. You may be set as the structure irradiated. In addition, it is conceivable that the incident optical system to the hologram has various configurations such as a configuration of condensing by a mirror as well as a lens.
As a phosphor cooling means, for example, a method of mechanically moving (for example, rotating) the phosphor itself and changing the position where the reproduced image is irradiated with time is also effective.

　図２は、本発明の蛍光体光源装置の他の例における構成の概略を示す図である。
　この蛍光体光源装置は、ホログラム素子として、レーザ光の入光面側に再生像が生成される反射型のものの代わりに、レーザ光の入光面の反対面側に再生像が生成される透過型のものが用いられている。
　レーザ光出射機構１０は、各々蛍光体３０を励起させる光を出射する励起用光源を構成する複数（例えば９つ）のレーザ光源１１と、レーザ光源１１より所定の拡がり角で出射される光を略平行光とする複数のコリメートレンズ１２とを具えている。
　各々のレーザ光源１１は、例えば互いに同一の発振波長のレーザ光を出射する半導体レーザよりなり、出射されるレーザ光の光軸が互いに平行に延びるよう配置されている。
　各々のコリメートレンズ１２は、対応するレーザ光源１１の光出射方向前方側の位置において、光軸が対応するレーザ光源の光軸と一致する状態で配置されている。 FIG. 2 is a diagram showing a schematic configuration in another example of the phosphor light source device of the present invention.
In this phosphor light source device, a hologram element is used to transmit a reconstructed image on the opposite side of the laser light incident surface, instead of a reflection type that generates a reconstructed image on the laser light incident surface. The type is used.
The laser beam emitting mechanism 10 includes a plurality of (for example, nine) laser light sources 11 constituting an excitation light source that emits light that excites the phosphors 30 and light emitted from the laser light source 11 at a predetermined divergence angle. A plurality of collimating lenses 12 for substantially parallel light are provided.
Each laser light source 11 is made of, for example, a semiconductor laser that emits laser beams having the same oscillation wavelength, and is arranged so that the optical axes of the emitted laser beams extend in parallel to each other.
Each collimator lens 12 is arranged at a position on the front side in the light emission direction of the corresponding laser light source 11 so that the optical axis coincides with the optical axis of the corresponding laser light source.

　この例における蛍光体光源装置は、レーザ光出射機構１０より出射されるレーザ光により再生像を生成する透過型のホログラム素子２１を具えている。
　ホログラム素子２１は、各々のレーザ光源１１よりのレーザ光が当該ホログラム素子２１の製造時に用いられた参照光の照射方向に沿った方向より照射される位置に配置されている。
　ホログラム素子２１には、蛍光体３０の入光面上の所定領域、例えば矩形領域を照明する光よりなる再生像が記録されている。
　ホログラム素子２１におけるレーザ光の各照射位置から発生する各再生像は、蛍光体３０上の再生像領域Ｘ内における光強度分布が均一となるものであり、蛍光体３０の入光面上の同一の位置に生成される。すなわち、各再生像は、蛍光体３０上において重畳されて蛍光体３０上の再生像領域Ｘ内における光強度分布が均一な合成再生像を形成する。図２においては、理解を容易にするために、ホログラム素子２１における２箇所のレーザ光の照射位置Ｌａ，Ｌｉより生成される再生像Ｈａ，Ｈｉのみを破線で示してある。 The phosphor light source device in this example includes a transmissive hologram element 21 that generates a reproduced image by laser light emitted from the laser light emitting mechanism 10.
The hologram element 21 is arranged at a position where the laser light from each laser light source 11 is irradiated from the direction along the irradiation direction of the reference light used when the hologram element 21 is manufactured.
The hologram element 21 records a reproduction image made of light that illuminates a predetermined area, for example, a rectangular area, on the light incident surface of the phosphor 30.
Each reproduced image generated from each irradiation position of the laser beam on the hologram element 21 has a uniform light intensity distribution in the reproduced image region X on the phosphor 30, and is the same on the light incident surface of the phosphor 30. Is generated at the position. That is, each reproduced image is superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region X on the phosphor 30. In FIG. 2, for easy understanding, only the reproduced images Ha and Hi generated from the two laser light irradiation positions La and Li in the hologram element 21 are shown by broken lines.

　ホログラム素子２１による合成再生像の形成位置には、合成再生像により励起されて発光する蛍光体３０が配置されている。
　この例における蛍光体３０は、例えば、円盤状の透光性基板３１の一面上に、蛍光体膜が円環状（リング状）に形成されて構成されている（図２においては、便宜上、蛍光体膜にハッチングが付してある。）。透光性基板３１は、図示しない駆動機構によって、当該透光性基板３１の中心軸（透光性基板３１に垂直な軸）Ｃ２を中心に回転駆動される。ここに、透光性基板３１の回転数は、例えば６０ｒｐｍである。このような構成とされていることにより、蛍光体３０が過熱状態となることを防止することができて蛍光体３０の損傷または機能低下（劣化）を抑制することができる。 A phosphor 30 that emits light when excited by the combined reproduction image is disposed at the position where the combined reproduction image is formed by the hologram element 21.
The phosphor 30 in this example is configured, for example, by forming a phosphor film in an annular shape (ring shape) on one surface of a disc-shaped translucent substrate 31 (in FIG. The body membrane is hatched.) The translucent substrate 31 is rotationally driven around a central axis (axis perpendicular to the translucent substrate 31) C2 of the translucent substrate 31 by a driving mechanism (not shown). Here, the rotational speed of the translucent substrate 31 is, for example, 60 rpm. With such a configuration, it is possible to prevent the phosphor 30 from being overheated and to suppress damage or deterioration (deterioration) of the function of the phosphor 30.

　上記の蛍光体光源装置においては、各々のレーザ光源１１より出射されるレーザ光がコリメートレンズ１２によって平行光とされてホログラム素子２１に照射される。これにより、ホログラム素子２１上のレーザ光の各照射位置から発生する再生像の各々が、回転駆動される透光性基板３１の一面上に形成された蛍光体３０の所定箇所において重畳されて、合成再生像が形成される。そして、合成再生像により蛍光体３０が励起されて発光し、当該蛍光が、蛍光体３０の入光面に垂直な軸を中心とする概略ランバーシアン分布の配光分布特性（均一な配光分布特性）にて透光性基板３１の他面側から出射される。この蛍光体光源装置より出射される光は、図１に示す蛍光体光源装置と同様に、例えば凸レンズによって平行光化するなどして利用することができる。
　このような構成の蛍光体光源装置によっても、上記と同様の効果を得ることができる。 In the phosphor light source device described above, the laser light emitted from each laser light source 11 is converted into parallel light by the collimator lens 12 and irradiated onto the hologram element 21. Thereby, each reproduction image generated from each irradiation position of the laser beam on the hologram element 21 is superimposed at a predetermined position of the phosphor 30 formed on one surface of the translucent substrate 31 to be rotationally driven, A composite reproduction image is formed. Then, the phosphor 30 is excited by the synthesized reproduction image to emit light, and the fluorescence is distributed in a light distribution distribution characteristic (uniform light distribution distribution) having an approximately Lambertian distribution centered on an axis perpendicular to the light incident surface of the phosphor 30. Characteristic), the light is emitted from the other surface side of the translucent substrate 31. The light emitted from the phosphor light source device can be used by making it parallel light by a convex lens, for example, as in the phosphor light source device shown in FIG.
Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained.

　図３は、本発明の蛍光体光源装置のさらに他の例における構成の概略を示す図である。
　この蛍光体光源装置は、図２に示す構成の蛍光体光源装置において、ホログラム素子２１に対する入射光学系として、レーザ光出射機構１０より出射される光を集束する集束レンズ１５および各レーザ光源１１よりの光をホログラム素子２１の入光面上において走査させる光学素子をさらに具えた構成とされていることの他は、図２示す蛍光体光源装置と同一の構成を有する。図３において、図２示す蛍光体光源装置のものと同一の構成部材には、同一の符号が付してあり、その説明を省略する。 FIG. 3 is a diagram showing a schematic configuration in still another example of the phosphor light source device of the present invention.
This phosphor light source device is a phosphor light source device having the configuration shown in FIG. 2, as an incident optical system for the hologram element 21, from a focusing lens 15 that focuses light emitted from the laser light emitting mechanism 10 and each laser light source 11. 2 has the same configuration as that of the phosphor light source device shown in FIG. 2 except that it further includes an optical element that scans the light on the light incident surface of the hologram element 21. 3, the same components as those of the phosphor light source device shown in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

　各レーザ光源１１より出射される光をホログラム素子２１の入光面上において走査させる光学素子として、例えば、各々ガルバノメータスキャナにより構成された１対のスキャンミラー４０Ａ，４０Ｂが用いられている。一方のスキャンミラー４０Ａは、集束レンズ１５によるレーザ光の集束位置において、集束レンズ１５によって集束されたレーザ光の光点がホログラム素子２１の入光面上において一方向に走査されるよう、揺動可能に設けられている。他方のスキャンミラー４０Ｂは、一方のスキャンミラー４０Ａよりのレーザ光の光点がホログラム素子２０Ａの入光面上において前記一方向とは垂直な他方向に走査されるよう、揺動可能に設けられている。各々のスキャンミラー４０Ａ，４０Ｂの揺動中心軸Ｃ３，Ｃ４は、互いに直交する方向に延びるよう設定されている。 For example, a pair of scan mirrors 40A and 40B each composed of a galvanometer scanner is used as an optical element for scanning the light emitted from each laser light source 11 on the light incident surface of the hologram element 21. One scan mirror 40 </ b> A swings so that the light spot of the laser beam focused by the focusing lens 15 is scanned in one direction on the light incident surface of the hologram element 21 at the laser beam focusing position by the focusing lens 15. It is provided as possible. The other scan mirror 40B is swingably provided so that the light spot of the laser beam from one scan mirror 40A is scanned in the other direction perpendicular to the one direction on the light incident surface of the hologram element 20A. ing. The oscillation center axes C3 and C4 of the scan mirrors 40A and 40B are set to extend in directions orthogonal to each other.

　上記の蛍光体光源装置においては、レーザ光出射機構１０より出射されるレーザ光が、集束レンズ１５によって集束されて、一対のスキャンミラー４０Ａ，４０Ｂに順次に入射される。これらの一対のスキャンミラー４０Ａ，４０Ｂが互いに関連されて制御されることにより、各レーザ光源１１より出射されるレーザ光がホログラム素子２１の入光面上の同一の位置に照射されると共に当該レーザ光の光点がホログラム素子２１の入光面上を２次元的な軌跡を描いて時間的に変化するよう走査される。これにより、ホログラム素子２１上のレーザ光の照射位置から発生する再生像が、回転駆動される透光性基板３１の一面上に形成された蛍光体の所定箇所において生成される。ここに、ホログラム素子２１による再生像は、レーザ光の照射位置に拘らず、蛍光体３０上の周方向における同一位置に生成される。そして、再生像により蛍光体３０が励起されて発光し、当該蛍光が、蛍光体３０の入光面に垂直な軸を中心とする概略ランバーシアン分布の配光分布特性（均一な配光分布特性）にて透光性基板３１の他面側から出射される。この蛍光体光源装置においても、出射される光は、図１に示す蛍光体光源装置と同様に、例えば凸レンズによって平行光化するなどして利用することができる。
　このような構成の蛍光体光源装置によっても、上記と同様の効果を得ることができ、しかも、ホログラム素子２１へのビーム集中による熱負荷を緩和することができる。 In the phosphor light source device described above, the laser light emitted from the laser light emitting mechanism 10 is converged by the converging lens 15 and sequentially incident on the pair of scan mirrors 40A and 40B. By controlling the pair of scan mirrors 40A and 40B in relation to each other, the laser light emitted from each laser light source 11 is applied to the same position on the light incident surface of the hologram element 21 and the laser is emitted. Scanning is performed so that the light spot of light changes in time on a light incident surface of the hologram element 21 while drawing a two-dimensional locus. Thereby, a reproduced image generated from the irradiation position of the laser beam on the hologram element 21 is generated at a predetermined position of the phosphor formed on one surface of the translucent substrate 31 that is rotationally driven. Here, the reproduced image by the hologram element 21 is generated at the same position in the circumferential direction on the phosphor 30 regardless of the irradiation position of the laser beam. Then, the phosphor 30 is excited by the reproduced image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on an axis perpendicular to the light incident surface of the phosphor 30 (uniform light distribution characteristic). ) From the other surface side of the translucent substrate 31. Also in this fluorescent light source device, the emitted light can be used by making it parallel light by a convex lens, for example, as in the fluorescent light source device shown in FIG.
Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained, and the thermal load due to the beam concentration on the hologram element 21 can be reduced.

　図４は、本発明の蛍光体光源装置のさらに他の例における構成の概略を示す図である。
　この蛍光体光源装置は、図１に示す構成の蛍光体光源装置において、複数のレーザ光源１１の各々に対応する複数のホログラム素子２０Ａ，２０Ｂ，２０Ｃが設けられた構成とされていることの他は、図１に示す蛍光体光源装置と同一の構成を有する。図４において、図１示す蛍光体光源装置のものと同一の構成部材には、同一の符号が付してあり、その説明を省略する。 FIG. 4 is a diagram showing a schematic configuration in still another example of the phosphor light source device of the present invention.
This phosphor light source device is configured such that a plurality of hologram elements 20A, 20B, and 20C corresponding to each of the plurality of laser light sources 11 are provided in the phosphor light source device having the configuration shown in FIG. Has the same configuration as the phosphor light source device shown in FIG. 4, the same components as those of the phosphor light source device shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

　各々のホログラム素子２０Ａ，２０Ｂ，２０Ｃは、蛍光体３０上の再生像領域内において所定の光強度分布を有する再生像Ｈ１，Ｈ２，Ｈ３を生成するものである。
　各々のホログラム素子２０Ａ，２０Ｂ，２０Ｃは、レーザ光出射機構１０における対応するレーザ光源１１より出射されるレーザ光が当該ホログラム素子２０Ａ，２０Ｂ，２０Ｃの製造時に用いられた参照光の照射方向に沿った方向より照射される位置に配置されている。そして、ホログラム素子２０Ａ，２０Ｂ，２０Ｃの各々は、再生像Ｈ１，Ｈ２，Ｈ３が蛍光体３０上において重畳されるよう配置されている。 Each hologram element 20A, 20B, 20C generates reproduction images H1, H2, H3 having a predetermined light intensity distribution in the reproduction image region on the phosphor 30.
Each hologram element 20A, 20B, 20C has a laser beam emitted from the corresponding laser light source 11 in the laser beam emission mechanism 10 along the irradiation direction of the reference light used when manufacturing the hologram elements 20A, 20B, 20C. It is arranged at the position irradiated from the direction. Each of the hologram elements 20A, 20B, and 20C is arranged so that the reproduced images H1, H2, and H3 are superimposed on the phosphor 30.

　上記の蛍光体光源装置においては、各々のレーザ光源１１より出射されるレーザ光がコリメートレンズ１２によって平行光とされて対応するホログラム素子２０Ａ，２０Ｂ，２０Ｃに照射されることにより、各々のホログラム素子２０Ａ，２０Ｂ，２０Ｃに記録された再生像Ｈ１，Ｈ２，Ｈ３が再生される。各再生像Ｈ１，Ｈ２，Ｈ３は、蛍光体３０上において重畳されて、蛍光体３０上の再生像領域内における光強度分布が均一な合成再生像が形成される。ここに、蛍光体に入射されるレーザ光（合成再生像）の強度分布は、各再生像Ｈ１，Ｈ２，Ｈ３の強度分布が互いに補償されて、例えばトップハット形状（均一な強度分布）を有するものとなる。そして、合成再生像により蛍光体３０が励起されて発光し、当該蛍光が、蛍光体３０の入光面に垂直な軸Ｃ１を中心とする概略ランバーシアン分布の配光分布特性（均一な配光分布特性）にて出射される。この蛍光体光源装置より出射される光は、例えば凸レンズ４５により平行光化するなどして利用することができる。
　このような構成の蛍光体光源装置によっても、上記と同様の効果を得ることができる。 In the phosphor light source device described above, each hologram element 20A, 20B, 20C is irradiated with the laser light emitted from each laser light source 11 as parallel light by the collimating lens 12 and thereby irradiated to each hologram element. Reproduced images H1, H2, and H3 recorded on 20A, 20B, and 20C are reproduced. The reproduced images H1, H2, and H3 are superimposed on the phosphor 30 to form a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor 30. Here, the intensity distribution of the laser light (synthetic reconstructed image) incident on the phosphor has a top hat shape (uniform intensity distribution), for example, as the intensity distribution of each reconstructed image H1, H2, H3 is mutually compensated. It will be a thing. Then, the phosphor 30 is excited by the synthesized reproduction image and emits light, and the fluorescence is distributed in a substantially Lambertian distribution centering on the axis C1 perpendicular to the light incident surface of the phosphor 30 (uniform light distribution). (Distribution characteristics). The light emitted from this phosphor light source device can be utilized by making it parallel light by a convex lens 45, for example.
Even with the phosphor light source device having such a configuration, the same effect as described above can be obtained.

　以上のように、本発明の蛍光体光源装置は、均一な光強度分布を有する光を高い光出力で出射することのできるものであるので、プロジェクタ装置用の光源装置として有用なものとなる。以下、本発明の蛍光体光源装置が搭載されたプロジェクタ装置について説明する。 As described above, since the phosphor light source device of the present invention can emit light having a uniform light intensity distribution with high light output, it is useful as a light source device for a projector device. Hereinafter, a projector apparatus equipped with the phosphor light source device of the present invention will be described.

＜プロジェクタ装置＞
　図５は、本発明の蛍光体光源装置が搭載されたプロジェクタ装置の一例における構成の概略を示す図である。
　このプロジェクタ装置は、第１の色光光源部５０Ｒ、第２の色光光源部５０Ｇおよび第３の色光光源部５０Ｂと、第１の色光光源部５０Ｒよりの色光Ｒ、第２の色光光源部５０Ｇよりの色光Ｇおよび第３の色光光源部５０Ｂよりの色光Ｂを合成して合成光Ｗを出射する色合成光学部材６０と、色合成光学部材６０よりの合成光Ｗが入射されて光画像Ｐが出射される空間変調素子７０と、光画像Ｐを拡大してスクリーンＳに投射する、投射レンズよりなる合成光画像投射機構８０とを具えている。 <Projector device>
FIG. 5 is a diagram showing an outline of a configuration in an example of a projector device on which the phosphor light source device of the present invention is mounted.
The projector device includes a first color light source unit 50R, a second color light source unit 50G, a third color light source unit 50B, a color light R from the first color light source unit 50R, and a second color light source unit 50G. The color light G and the color light B from the third color light source 50B are combined to emit the combined light W, and the combined light W from the color composite optical member 60 is incident to generate the optical image P. A spatial modulation element 70 to be emitted and a combined light image projection mechanism 80 made of a projection lens for enlarging and projecting the light image P onto the screen S are provided.

　第１の色光光源部５０Ｒは、色光Ｒ（例えば赤色光）を放射する第１のレーザ光源を励起用光源として具えた、図１乃至図３のいずれかの蛍光体光源装置により構成されている。
　第２の色光光源部５０Ｇは、色光Ｇ（例えば緑色光）を放射する第２のレーザ光源を励起用光源として具えた、図１乃至図３のいずれかの蛍光体光源装置により構成されている。
　第３の色光光源部５０Ｂは、色光Ｂ（例えば青色光）を放射する第３のレーザ光源を励起用光源として具えた、図１乃至図３のいずれかの蛍光体光源装置により構成されている。 The first color light source unit 50R includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a first laser light source that emits color light R (for example, red light) as an excitation light source. .
The second color light source unit 50G includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a second laser light source that emits color light G (for example, green light) as an excitation light source. .
The third color light source unit 50B includes the phosphor light source device of any one of FIGS. 1 to 3 that includes a third laser light source that emits color light B (for example, blue light) as an excitation light source. .

　色合成光学部材６０は、第１の色光光源部５０Ｒよりの色光Ｒの光路、第２の色光光源部５０Ｇよりの色光Ｇの光路および第３の色光光源部５０Ｂよりの色光Ｂの光路の交点に配置されている。色合成光学部材６０としては、例えばダイクロイックプリズムなどの色合成プリズムを用いることができる。 The color combining optical member 60 is an intersection of the optical path of the colored light R from the first colored light source 50R, the optical path of the colored light G from the second colored light source 50G, and the optical path of the colored light B from the third colored light source 50B. Is arranged. As the color synthesis optical member 60, for example, a color synthesis prism such as a dichroic prism can be used.

　この例における空間変調素子７０としては、例えば透過型のものが用いられており、色合成光学部材６０よりの合成光Ｗの光路上に配置されている。 As the spatial modulation element 70 in this example, for example, a transmission type element is used, and is arranged on the optical path of the synthesized light W from the color synthesizing optical member 60.

　上記のプロジェクタ装置においては、第１の色光光源部５０Ｒよりの色光Ｒ、第２の色光光源部５０Ｇよりの色光Ｇおよび第３の色光光源部５０Ｂよりの色光Ｂが色合成光学部材６０に入射され、この色合成光学部材６０によって合成されて合成光Ｗが出射される。色合成光学部材６０よりの合成光Ｗは空間変調素子７０に入射され、この空間変調素子７０によって変調されることにより形成された光画像Ｐが合成光画像投射機構８０を介してスクリーンＳに拡大投射される。 In the projector apparatus, the color light R from the first color light source unit 50R, the color light G from the second color light source unit 50G, and the color light B from the third color light source unit 50B are incident on the color combining optical member 60. Then, the combined light W is emitted after being combined by the color combining optical member 60. The combined light W from the color combining optical member 60 is incident on the spatial modulation element 70, and the light image P formed by being modulated by the spatial modulation element 70 is enlarged on the screen S via the combined light image projection mechanism 80. Projected.

　上記のプロジェクタ装置によれば、各色光光源部５０Ｒ，５０Ｇ，５０Ｂが上記の蛍光体光源装置により構成されていることにより、当該蛍光体光源装置が均一な光強度分布を有する光を高い光出力で出射することのできるものであるので、高輝度の画像を投射することができる。 According to the projector device described above, each of the color light source units 50R, 50G, and 50B includes the phosphor light source device, so that the phosphor light source device outputs light having a uniform light intensity distribution with a high light output. Therefore, it is possible to project a high-luminance image.

　１０　レーザ光出射機構
　１１　レーザ光源
　１２　コリメートレンズ
　１５　集束レンズ
　２０，２０Ａ，２０Ｂ，２０Ｃ　ホログラム素子（反射型）
　２１　ホログラム素子（透過型）
　３０　蛍光体
　３１　透光性基板
　４０Ａ，４０Ｂ　スキャンミラー
　４５　凸レンズ
　Ｈ１，Ｈ２，Ｈ３，Ｈａ，Ｈｉ　再生像
　　Ｘ　再生像領域
　５０Ｒ　第１の色光光源部
　５０Ｇ　第２の色光光源部
　５０Ｂ　第３の色光光源部
　６０　色合成光学部材
　７０　空間変調素子
　８０　合成光画像投射機構
　　Ｓ　スクリーン
　　Ｐ　光画像
                                                                                 DESCRIPTION OF SYMBOLS 10 Laser beam emission mechanism 11 Laser light source 12 Collimating lens 15 Focusing lens 20, 20A, 20B, 20C Hologram element (reflection type)
21 Hologram element (transmission type)
30 phosphor 31 translucent substrate 40A, 40B scan mirror 45 convex lens H1, H2, H3, Ha, Hi reproduction image X reproduction image region 50R first color light source unit 50G second color light source unit 50B third color light source Section 60 Color combining optical member 70 Spatial modulation element 80 Synthetic light image projection mechanism S Screen P Optical image

Claims (5)

　蛍光体と、当該蛍光体を励起させる光を出射する励起用光源とを具備し、当該蛍光体から発せられる光が出射される蛍光体光源装置であって、
　ホログラム素子が、前記励起用光源よりの光が当該ホログラム素子の製造時に用いられた参照光の照射方向に沿った方向より照射される位置であって、かつ、当該ホログラム素子に記録された再生像が前記蛍光体上に生成される位置に、配置されており、
　当該ホログラム素子は、前記蛍光体上の再生像領域内における光強度分布が均一な再生像を生成するものであることを特徴とする蛍光体光源装置。 A phosphor light source device comprising a phosphor and an excitation light source that emits light that excites the phosphor, and that emits light emitted from the phosphor,
The hologram element is a position where the light from the excitation light source is irradiated from the direction along the irradiation direction of the reference light used in manufacturing the hologram element, and a reproduced image recorded on the hologram element Is arranged at a position where it is generated on the phosphor,
The phosphor light source device according to claim 1, wherein the hologram element generates a reproduction image having a uniform light intensity distribution in a reproduction image region on the phosphor. 　複数の励起用光源を具えており、当該各々の励起用光源より出射されるレーザ光の前記ホログラム素子上の各照射位置から発生する再生像の各々が、前記蛍光体の入射面において重ね合わせられることを特徴とする請求項１に記載の蛍光体光源装置。 A plurality of excitation light sources are provided, and each reproduction image generated from each irradiation position on the hologram element of the laser light emitted from each excitation light source is superimposed on the incident surface of the phosphor. The phosphor light source device according to claim 1. 　前記励起用光源より出射される光を前記ホログラム素子の入光面上において走査させる光学素子を具えていることを特徴とする請求項１または請求項２に記載の蛍光体光源装置。 3. The phosphor light source device according to claim 1, further comprising an optical element that scans light emitted from the excitation light source on a light incident surface of the hologram element. 4. 　蛍光体と、当該蛍光体を励起させる光を出射する複数の励起用光源とを具備し、当該蛍光体から発せられる光が出射される蛍光体光源装置であって、
　複数のホログラム素子が、対応する励起用光源より出射される光が当該ホログラム素子の製造時に用いられた参照光の照射方向に沿った方向より照射される位置であって、かつ、当該ホログラム素子に記録された再生像が前記蛍光体上に生成される位置に、配置されており、
　前記複数のホログラム素子による再生像の各々が重ね合わせられて、前記蛍光体上の再生像領域内における光強度分布が均一な合成再生像が生成されることを特徴とする蛍光体光源装置。 A phosphor light source device comprising a phosphor and a plurality of excitation light sources that emit light that excites the phosphor, and that emits light emitted from the phosphor,
The plurality of hologram elements are positions where light emitted from the corresponding excitation light source is irradiated from the direction along the irradiation direction of the reference light used at the time of manufacturing the hologram element, and the hologram element It is arranged at a position where the recorded reproduced image is generated on the phosphor,
The phosphor light source device characterized in that each of the reproduced images by the plurality of hologram elements is superimposed to generate a combined reproduced image having a uniform light intensity distribution in the reproduced image region on the phosphor. 　前記ホログラム素子は、前記蛍光体上の矩形領域を照明する光よりなる再生像が記録されたものであることを特徴とする請求項１または請求項４に記載の蛍光体光源装置。
                                                                                 5. The phosphor light source device according to claim 1, wherein the hologram element is a recording of a reproduction image made of light that illuminates a rectangular region on the phosphor. 6.
PCT/JP2013/062474 2012-06-15 2013-04-26 Phosphor light source device Ceased WO2013187145A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012135460A JP2014002839A (en) 2012-06-15 2012-06-15 Phosphor light source device
JP2012-135460 2012-06-15

Publications (1)

Publication Number Publication Date
WO2013187145A1 true WO2013187145A1 (en) 2013-12-19

Family

ID=49757980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/062474 Ceased WO2013187145A1 (en) 2012-06-15 2013-04-26 Phosphor light source device

Country Status (3)

Country Link
JP (1) JP2014002839A (en)
TW (1) TW201403131A (en)
WO (1) WO2013187145A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036425A1 (en) * 2013-09-10 2015-03-19 Valeo Vision Lighting module for a vehicle
WO2016082960A1 (en) * 2014-11-25 2016-06-02 Robert Bosch Gmbh Headlight module comprising a beam directing device and a luminophore
JP2017504075A (en) * 2014-01-13 2017-02-02 フィリップス ライティング ホールディング ビー ヴィ Lamp and method for using such a lamp
AT517519B1 (en) * 2015-08-03 2017-04-15 Zkw Group Gmbh A method for driving a laser lighting device for a vehicle headlight

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6922881B2 (en) * 2014-11-07 2021-08-18 大日本印刷株式会社 Display device and mobile
JP6697765B2 (en) 2015-09-29 2020-05-27 パナソニックＩｐマネジメント株式会社 Light source device and light projecting device
DE102016117557A1 (en) * 2016-09-19 2018-03-22 HELLA GmbH & Co. KGaA Lighting device for vehicles
WO2018114479A1 (en) * 2016-12-19 2018-06-28 Lumileds Holding B.V. Laser lighting module for vehicle headlight
CN110418917B (en) 2017-03-28 2020-08-21 松下知识产权经营株式会社 Light source device and light projection device
JP2021089303A (en) * 2019-12-02 2021-06-10 キヤノン株式会社 Light source device and image projection device
JP2021089302A (en) * 2019-12-02 2021-06-10 キヤノン株式会社 Light source device and image projection device
JP2022050838A (en) * 2020-09-18 2022-03-31 カシオ計算機株式会社 Light source device and projection device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003043581A (en) * 2001-07-31 2003-02-13 Hitachi Ltd Illumination device and projection type video display device using the same
JP2008152116A (en) * 2006-12-19 2008-07-03 Lasertec Corp Lighting device and lighting method
JP2012103615A (en) * 2010-11-12 2012-05-31 Seiko Epson Corp Illumination device and projector
JP2012174520A (en) * 2011-02-22 2012-09-10 Stanley Electric Co Ltd LIGHTING OPTICAL SYSTEM AND METHOD FOR MANUFACTURING LIGHTING OPTICAL SYSTEM

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003043581A (en) * 2001-07-31 2003-02-13 Hitachi Ltd Illumination device and projection type video display device using the same
JP2008152116A (en) * 2006-12-19 2008-07-03 Lasertec Corp Lighting device and lighting method
JP2012103615A (en) * 2010-11-12 2012-05-31 Seiko Epson Corp Illumination device and projector
JP2012174520A (en) * 2011-02-22 2012-09-10 Stanley Electric Co Ltd LIGHTING OPTICAL SYSTEM AND METHOD FOR MANUFACTURING LIGHTING OPTICAL SYSTEM

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015036425A1 (en) * 2013-09-10 2015-03-19 Valeo Vision Lighting module for a vehicle
JP2017504075A (en) * 2014-01-13 2017-02-02 フィリップス ライティング ホールディング ビー ヴィ Lamp and method for using such a lamp
US9903564B2 (en) 2014-01-13 2018-02-27 Philips Lighting Holdings B.V. Lamp as well as a method for using such a lamp
WO2016082960A1 (en) * 2014-11-25 2016-06-02 Robert Bosch Gmbh Headlight module comprising a beam directing device and a luminophore
AT517519B1 (en) * 2015-08-03 2017-04-15 Zkw Group Gmbh A method for driving a laser lighting device for a vehicle headlight
US10670220B2 (en) 2015-08-03 2020-06-02 Zkw Group Gmbh Method for controlling a laser illumination device for a motor vehicle headlight

Also Published As

Publication number Publication date
JP2014002839A (en) 2014-01-09
TW201403131A (en) 2014-01-16

Similar Documents

Publication Publication Date Title
WO2013187145A1 (en) Phosphor light source device
JP6292523B2 (en) Wavelength conversion device, illumination optical system, and electronic apparatus using the same
JP5987368B2 (en) Illumination device and projection device
JP5617288B2 (en) Lighting device and projector
JP5673247B2 (en) Light source device and projector
JP6311219B2 (en) Illumination light forming device, illumination light source device, and image display device
JP5664222B2 (en) Light source device and projector
JP5527835B2 (en) Illumination optical system and projector using the same
US9740088B2 (en) Light source apparatus and projection display apparatus provided with same including waveplate and dichroic prism
JP5716401B2 (en) Light source device and projector
JP6626733B2 (en) Light emitting device, lighting device, and projection device
JP6796751B2 (en) Light source device and projection type image display device
JP2013041170A (en) Light source device and projector
JP6406736B2 (en) Projector and image display method
JP2014142369A (en) Illumination optical system and electronic apparatus using the same
JP6244558B2 (en) Light source device and projection display device
JP2016136461A (en) Illumination device and projection device using the same
JP2014186080A (en) Light source device and projection video display device
JP2017015966A (en) Light source device and projector
JP2016145881A (en) Wavelength conversion element, lighting device and projector
JP2012037638A (en) Light source device and projector
JP6238204B2 (en) Photosynthesis unit
JP5949983B2 (en) Light source device and projector
JP6094866B2 (en) Illumination optics
JP5733376B2 (en) projector

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13804777

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13804777

Country of ref document: EP

Kind code of ref document: A1