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WO2024083370A1 - Unité de déviation - Google Patents

Unité de déviation Download PDF

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Publication number
WO2024083370A1
WO2024083370A1 PCT/EP2023/069534 EP2023069534W WO2024083370A1 WO 2024083370 A1 WO2024083370 A1 WO 2024083370A1 EP 2023069534 W EP2023069534 W EP 2023069534W WO 2024083370 A1 WO2024083370 A1 WO 2024083370A1
Authority
WO
WIPO (PCT)
Prior art keywords
deflection unit
user
unit
image content
designed
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/EP2023/069534
Other languages
German (de)
English (en)
Inventor
Robert Weiss
Karoly Varga-Umbrich
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2024083370A1 publication Critical patent/WO2024083370A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G02B2027/0105—Holograms with particular structures
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G02B2027/0185—Displaying image at variable distance
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G02B2027/0187—Display position adjusting means not related to the information to be displayed slaved to motion of at least a part of the body of the user, e.g. head, eye
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking

Definitions

  • the invention relates to a deflection unit, an optical system for a virtual retinal display (retinal scan display) and a method for projecting at least one image content onto the retina of a user with the aid of an optical system.
  • data glasses are described as an optical system.
  • the lenses are designed to be exchanged depending on the user's diopters.
  • the invention is therefore based on the object of enabling a simplified vision correction for the user of the data glasses.
  • a deflection unit according to claim 1 is proposed. Furthermore, an optical system for a virtual retinal display (retinal scan display) according to claim 6 and a method for projecting at least one image content onto the retina of a user with the aid of an optical system according to claim 14 are proposed.
  • the deflection unit is designed in particular for use in an optical system for a virtual retinal display (retinal scan display).
  • An image content can be projected onto the deflection unit by means of a projector unit.
  • the deflection unit is designed to direct the image content onto an eye of a user.
  • the deflection unit has at least partially an uneven, in particular wavy, profile at least on a surface of the deflection unit directed towards the eye of the user.
  • the surface directed towards the user is in particular the surface onto which the image content strikes.
  • the profile is designed in such a way that when at least part of the image content strikes a plurality of defined positions, in particular areas, of the profile, the image content is focused on a retina of the user.
  • the deflection unit with its uneven profile thus enables vision correction, which can be generated by the image content in the form of the scanned light beam striking certain, defined positions of the uneven profile.
  • myopia nearsightedness
  • the image content must be brought closer to the retina for optimal focusing on the user's retina.
  • the areas protruding from the uneven profile or the "mountains” are chosen as the defined positions for deflection onto the user's eye.
  • hyperopia farsightedness
  • the image content must be further away from the retina for optimal focusing on the user's retina.
  • the areas sloping from the uneven profile or the "valleys" are chosen as defined positions for redirection to the user's eye.
  • the uneven, particularly wavy, profile is preferably designed as a sinusoidal profile, particularly in a cross-section of the deflection unit. This profile makes it particularly easy to create "peaks" and "valleys" for redirecting the image content from defined positions.
  • the deflection unit is preferably designed as a metastructure.
  • Such metastructures are in particular nanostructured surfaces on a flat, translucent carrier material.
  • the advantage of such a metastructure is in particular its small size and weight.
  • the deflection unit is designed as a holographic optical element (HOE).
  • HOEs deflect the image content to the user's eye depending on the angle of incidence and/or wavelength.
  • the deflection unit is designed as a mirror.
  • each position, in particular each area, of the uneven profile of the deflection unit is assigned at least one defined focal length, in particular focal length.
  • the design of the wavy surface is preferably such that the image curvature radius which can also occur mixed in certain positions.
  • the axis of the two focal planes also changes continuously. This means that an existing astigmatism of the user is also linked to an optimal position on the wavy surface, which leads to optimal focusing on the retina and thus to optimal signal strength.
  • optical system for a virtual retinal display (retinal scan display).
  • This optical system comprises an image source that supplies the image content in the form of image data.
  • the optical system comprises an image processing device for the image data.
  • the optical system has a projector unit with a first light source, in particular one that can be modulated over time, for generating first light rays, in particular those that are visible to the user.
  • the projector unit additionally has a controllable deflection device for the first light rays for scanning projection of the image content.
  • the controllable deflection device is in particular designed as at least one micromirror that is mounted so that it can rotate in one or two dimensions.
  • the optical system has the deflection unit described above, onto which the image content is projected.
  • the deflection unit is designed to direct the image content onto an eye of a user.
  • the deflection unit has at least partially an uneven, in particular wavy, profile at least on a surface of the deflection unit that is directed towards the eye.
  • the profile is designed in such a way that when at least part of the image content hits a plurality of defined positions, in particular areas, of the profile, the image content is focused on a retina of the user.
  • the first light beams are preferably designed as light beams in a red wavelength range.
  • the projector unit additionally has a second light source, in particular one that can be modulated over time, for generating second light beams in a green wavelength range and a third light source, in particular one that can be modulated over time, for generating third light beams in a blue wavelength range.
  • the projected image content is then composed of the first, second and third light beams. A color image can thus be generated as the image content.
  • the projector unit is preferably in this state- context designed to combine the first, second and third light beams into common, collimated light beams.
  • the optical system additionally has a storage unit in which a defined at least one focal length, in particular focus length, is stored, associated with a respective position, in particular a respective area, of the uneven profile of the deflection unit.
  • the same at least one focal length is assigned to several positions. This is because some positions of the uneven profile simply have the same distance from the user's eye or retina.
  • the optical system also has a first input device, which is designed to receive an input from the user about a diopter value of at least one of the user's eyes.
  • the input device can be provided as a digital input mask on the optical system. Alternatively, the input device can also be provided as a mechanical input device.
  • the storage unit and the input device can also be provided externally, outside the optical system on, for example, a mobile device.
  • this mobile device has a connection, in particular a wireless one, to the optical system.
  • the optical system also has a control unit, which is designed to assign at least one focal length of the user stored in the storage unit, corresponding to the entered diopter value.
  • the calculation of the focal length from the diopter value is known to those skilled in the art. The assignment can be made, for example, using a lookup table.
  • the control unit is designed to control the first light source in such a way that the first light rays only impinge on the plurality of defined positions of the uneven profile of the deflection unit assigned to the stored focal length.
  • the first light source is in particular controlled in such a way that the first light source is switched on and off at defined times. This switching of the first light source on and off then leads to the first light rays only impinging on the plurality of defined positions of the uneven profile of the deflection unit assigned to the stored focal length.
  • the image data can also be blanked or activated at the defined times.
  • the optical system additionally has a second input device which is designed to enable the user of the optical system to manually adjust, in particular set, the plurality of defined positions of the profile.
  • This input device is provided in particular as a mechanical adjustment wheel, by means of which the user independently sets the ideal focus length or the appropriate time intervals for emitting the first light beams by turning the wheel.
  • the projector unit preferably additionally has a fourth light source for generating fourth light beams in an infrared wavelength range.
  • the controllable deflection device is also designed to deflect the fourth light beams in a scanning manner.
  • the fourth light beams are also projected onto the deflection unit.
  • the deflection unit is designed to direct the fourth light beams onto the user's eye, wherein the profile of the deflection unit is designed such that when the fourth light beams impinge on the plurality of defined positions, in particular areas, of the uneven profile, the fourth light beams are focused on the user's retina.
  • the optical system additionally has a sensor which is designed to detect fourth light beams scattered back from a user's retina or a modulation of a power, in particular a laser power, of the fourth light source.
  • the sensor serves as an eye tracking sensor.
  • the sensor is preferably designed as part of a laser feedback interferometer, in particular integrated into the projector unit.
  • the sensor is designed as an external sensor, which is arranged in particular on a frame of data glasses as an optical system.
  • the sensor is designed as a photodetector in both cases.
  • control unit serves to determine, in particular continuously, the plurality of defined positions that focus the image content on the user's retina, depending on the fourth light rays detected by the sensor and scattered back from the user's retina or the modulation of the power of the fourth light source.
  • the control unit can determine at which positions of the uneven profile the fourth light rays are optimally focused on the retina.
  • the eye tracking signal generated by the reflected fourth light rays is at these positions.
  • the control unit is also designed to control the first light source in such a way that the first light rays only hit the determined, defined positions of the uneven profile of the deflection unit.
  • control unit is also designed in particular to switch the first light source on and off at defined times or to blank or activate the image data.
  • the optimal focal length can thus be continuously determined and readjusted using the control unit.
  • control unit also controls the fourth light source and synchronizes the emission of the first and fourth light rays.
  • the projector unit is designed to combine the first and fourth light beams into common, collimated light beams.
  • the first and second light beams are thus scanned along the same scan path by means of the controllable deflection device.
  • the projector unit is designed to combine the first, second, third and fourth light beams into common, collimated light beams.
  • the optical system additionally has an optical segmentation element which has at least a first segment for projecting the image content generated by the scanning projector unit via a first imaging path onto at least one projection area of the deflection unit.
  • the projection area here comprises the uneven profile of the deflection unit.
  • the projection area corresponds to the uneven profile of the deflection unit.
  • the optical segmentation element has a second segment for projecting the image content generated by the scanning projector unit via a second imaging path, which is different from the first, onto the at least one projection area of the deflection unit.
  • the deflection unit is designed to deflect the image content onto the user's eye in such a way that, in particular one after the other in time, a plurality of exit pupils (A, B) arranged spatially offset from one another are generated with the image content.
  • the user's effective eyebox is thus enlarged.
  • the deflection unit is designed in particular as a multiplexing HOE.
  • the deflection unit is designed as two separate HOEs, which are stacked in particular as layers. The different exit pupils are preferably selected depending on a detected and/or determined eye condition of the user.
  • the optical system is designed as data glasses.
  • the optical system has an image source that supplies the image content in the form of image data.
  • the optical system has an image processing device for the image data.
  • the optical system comprises a projector unit with a first light source, in particular one that can be modulated in time, for generating first, in particular visible, light rays.
  • the projector unit also has a controllable deflection device for the first light rays for scanning projection of the image content.
  • the optical system has the deflection unit described above, onto which the image content is projected.
  • the deflection unit serves to direct the image content onto an eye of a user.
  • the deflection unit has at least partially an uneven, in particular wavy, profile at least on a surface of the deflection unit directed towards the eye.
  • the image content is focused on the user's retina when at least part of the image content strikes a plurality of defined positions, in particular regions, of the uneven profile of the deflection unit.
  • the projector unit preferably has a fourth light source for generating fourth light beams in an infrared wavelength range.
  • the fourth light beams in an infrared wavelength range are also generated by means of the fourth light source.
  • the fourth light beams are projected onto the deflection unit and deflected onto the user's eye by means of the deflection unit.
  • fourth light beams scattered back from a retina of the user or a modulation of a power, in particular a laser power, of the fourth light source are detected by means of a sensor of the optical system.
  • the (plurality t R(i] of defined positions of the uneven profile of the deflection unit are determined depending on the fourth light rays detected by the sensor and scattered back from the user's retina or the modulation of the power of the fourth light source.
  • the first light source is then controlled by the control unit of the optical system in such a way that the first light rays only impinge on the determined, defined positions of the uneven profile of the deflection unit.
  • an input from the user regarding a diopter value of at least one eye of the user is recorded by means of a first input device, in particular of the optical system.
  • a defined at least one focal length, in particular focal length is assigned to a respective position, in particular a respective area, of the uneven profile of the deflection unit.
  • the calculation of the focal length from the diopter value is known to those skilled in the art. The assignment can be made, for example, using a lookup table.
  • the first light source is then controlled by means of the control unit in such a way that the first light rays only impinge on the plurality of defined positions of the uneven profile of the deflection unit assigned to the stored focal length.
  • Figure 1 shows an optical system for a virtual retinal display (retinal scan display).
  • Figure 2 shows the optical system as data glasses.
  • Figures 3a and 3b show the nearsightedness and farsightedness of the data glasses user.
  • Figure 4 shows an uneven profile of the deflection unit.
  • Figure 5 shows a plurality of defined positions of an uneven profile of the deflection unit.
  • Figure 6a shows a first embodiment of a method for projecting at least one image content onto the retina of a user with the aid of an optical system.
  • Figure 6b shows a second embodiment of the method for projecting at least one image content onto the retina of a user by means of an optical system.
  • Figure 1 shows an embodiment of an optical system la for a virtual retinal display (retinal scan display).
  • the optical system la has an image source 26a that supplies the image content in the form of image data 12a.
  • the optical system la has an image processing device 10a for the image data 12a.
  • the optical system la has a projector unit 16a with a first light source 82a, which can be modulated in particular over time, for generating first, in particular visible, light rays.
  • a controllable deflection device 92a of the projector unit 16a is used for scanning projection of the image content in the form of the first light rays.
  • the optical system la has a deflection unit 106a onto which the image content is projected.
  • the deflection unit 106a which in this case is designed as a holographic optical element and is integrated into a lens 68a, is used to direct the image content onto an eye 24a of a user.
  • the deflection unit 106a has an uneven profile (not shown here for the sake of simplicity) on a surface of the deflection unit 106a directed towards the eye 24a.
  • the uneven profile is designed in such a way that when at least part of the image content hits a plurality of defined positions, in particular areas, of the profile, the image content is focused on a retina 22a of the user.
  • Figure 3a shows the consequences of a user's myopia (nearsightedness).
  • the incoming first light rays 105a shown here as an example are not focused on the retina 102a of the eye 103a after passing through the pupil 104a and the lens 109a of the user, but have a focal point 101a that is too short.
  • Figure 3b shows the consequences of a user's hyperopia (farsightedness).
  • the The incoming first light rays 105b shown by way of example are also not optimally focused on the retina 102b of the eye 103b after passing through the pupil 104b and the lens 109b of the user, but have a focal point 101b that is too wide.
  • the displayed image content appears blurred to the user.
  • the invention enables visual acuity correction for the user of the optical system la.
  • Figure 4 shows such an uneven profile lila at least on a surface directed towards the eye of a deflection unit 110a shown by way of example.
  • the wavy profile lila is designed as a sinusoidal profile, in particular in a cross section of the deflection unit.
  • the deflection unit 110a is designed as a holographic optical element.
  • the deflection unit 110a can also be designed as a metastructure or as a mirror.
  • Figure 5 shows a side view of such sinusoidal profiles, wherein the deflection units 120a and 120b shown as examples are designed as two stacked holographic optical elements.
  • the sinusoidal profiles have a plurality of regions or "valleys” sloping down from the sinusoidal profiles as defined first positions 121a, 121b, 121c, and 121d, in particular first regions of the profile. Furthermore, the sinusoidal profiles have a plurality of regions or "mountains” protruding from the sinusoidal profiles as defined second positions 122a, 122b, 122c, and 122d, in particular second regions of the profile. At least one defined focal length, in particular focal length, is assigned to the first positions 121a, 121b, 121c, and 121d and the second positions 122a, 122b, 122c, and 122d of the uneven profile.
  • the first light beams not shown in Figure 1 are designed as light beams in a red wavelength range.
  • the projector unit 16a in this embodiment has a second light source 84a, which can be modulated in particular over time, for generating second light beams (not shown here) in a green wavelength range and a third light source 85a, which can be modulated in particular over time, for generating third light beams (not shown here) in a blue wavelength range.
  • the projected image content is made up of the first, second and third light beams.
  • the optical system la additionally has a storage unit 17a in which, a respective position, in particular a respective area, of the uneven profile of the deflection unit 106a is assigned a defined at least one focal length. In particular, the same at least one focal length is assigned to several positions. Furthermore, the optical system la in Figure 1 has a first input device 25a, which is designed to receive an input from the user about a diopter value of at least one eye of the user.
  • the optical system la has a control unit 80a, which is designed to assign at least one focal length of the user corresponding to the entered diopter value and stored in the memory unit 17a, and to control the first light source 82a in such a way that the first light rays only impinge on the plurality of defined positions of the uneven profile of the deflection unit 106a assigned to the stored focal length.
  • the memory unit 17a is integrated in the control unit 80a.
  • the control unit 80a is in turn integrated in the projector unit 16a.
  • the projector unit 16a in Figure 1 additionally has a fourth light source 86a for generating fourth light beams in an infrared wavelength range.
  • the controllable deflection device 92a serves to deflect the fourth light beams in a scanning manner.
  • the deflection unit 106a in turn serves to direct the fourth light beams onto the eye 24a of the user, wherein the profile of the deflection unit 106a is designed such that when the fourth light beams impinge on the majority of defined positions of the profile, the fourth light beams are focused on the retina 22a of the user.
  • the optical system 1a additionally has a sensor 62a which is designed to detect fourth light beams 21a scattered back from a retina 22a of the user.
  • the control unit 80a serves to determine, in particular continuously, the plurality of defined positions that focus the image content on the user's retina 22a, depending on the fourth light beams 21a detected by the sensor 62a and scattered back from the user's retina 22a.
  • the control unit 80a is further designed to control the first light source 82a in such a way that the first light beams only impinge on the determined, defined positions of the uneven profile of the deflection unit 106a.
  • the sensor 62a is designed as an external sensor. However, the sensor 62a can alternatively also be part of a laser feedback interferometer. ters, in particular integrated into the projector unit 16a.
  • control unit 80a is designed to generate first control signals 94a for the controllable deflection device 92a of the optical system 1 such that the scanning area of the deflection device 92a is adjusted depending on a detected and/or determined eye condition of the user.
  • the controllable deflection device 92a regularly sends its current position signals back to the projector control unit 80a (see arrow 96a).
  • the projector unit 16a is designed to combine the first, second, third and fourth light beams into common light beams 18a by means of a beam combining and/or beam shaping unit 88a.
  • the projector unit 16a further comprises a beam divergence adjustment unit 90a.
  • the beam divergence adjustment unit 90a is provided to adjust a beam divergence of the common light beams 18a leaving the projector unit 16a, in particular laser beams, preferably to a path length of the respective currently emitted common light beams 18a, which path length depends on an arrangement of optical elements of the optical system 1a.
  • the light sources 82a, 84a, 85a and 86a are integrated in a laser module 132a in this embodiment.
  • the optical system 1a in this embodiment has an optical segmentation element 33a.
  • the optical segmentation element 33a which is designed as a segmentation lens, in turn has a first segment 36a for projecting the image content generated by the scanning projector unit 16a via a first imaging path 28a onto a projection area 34a of the deflection unit 106a.
  • the projection area 34a is designed as the uneven profile of the deflection unit 106a.
  • the common light rays 18a are projected via the first imaging path.
  • the optical segmentation element 33a has a second segment 32a for projecting the image content generated by the scanning projector unit 16a via a second imaging path 30a, which is different from the first, onto the projection area 34a of the deflection unit 106a.
  • the common light rays 18a are projected via the second imaging path.
  • the The steering unit 106 in turn serves to redirect the image content to the eye 24a of the user in such a way that a plurality of exit pupils A and B arranged spatially offset from one another are generated with the image content one after the other.
  • Figure 2 shows an optical system 1b for a virtual retinal display (retinal scan display) in the form of data glasses.
  • the projector unit 16a and the image source 26a are integrated into a first temple 74a of the data glasses.
  • the deflection unit 106a is integrated into a lens 66a of the data glasses.
  • the data glasses have a further lens 70a, a frame 144a and a further temple 76a.
  • a projector unit 16a is only provided in one temple 74a and a deflection unit 106a is only provided in one lens 66a.
  • at least one deflection unit 106a can be provided in each lens 70a and 66a and at least one projector unit 16a can be provided in each temple 74a and 76a.
  • the optical system 1b has a second input device 71a in the form of a button-like knurled operating element.
  • the second input device which is integrated in the first temple 74a, serves to enable the user of the optical system to manually adjust, in particular set, the majority of defined positions of the profile.
  • Figure 6a shows, in the form of a flow chart, a first embodiment of a method for projecting at least one image content onto the retina of a user using an optical system.
  • the optical system can be an optical system as shown in Figure 1.
  • the optical system comprises an image source that supplies the image content in the form of image data.
  • the optical system comprises an image processing device for the image data and a projector unit with a first light source, in particular one that can be modulated in time, for generating first, in particular visible, light rays.
  • the projector unit additionally has a controllable deflection device for the first light rays for scanning projection of the image content.
  • the optical system comprises a deflection unit on which before the image content is projected.
  • a method step 240 the image content is redirected to a user's eye.
  • the redirection unit has at least partially an uneven, in particular wavy, profile at least on a surface of the redirection unit directed towards the eye.
  • the image content is focused in method step 240 when at least part of the image content hits a plurality of defined positions, in particular areas, of the uneven profile of the redirection unit on the user's retina. The method is then terminated.
  • fourth light rays in an infrared wavelength range are generated by means of a fourth light source of the projector unit.
  • the fourth light rays are then projected onto the deflection unit in a method step 210.
  • the fourth light rays are deflected onto the user's eye by means of the deflection unit.
  • the fourth light rays scattered back by a retina of the user or a modulation of a power, in particular a laser power, of the fourth light source are then detected by means of a sensor.
  • a method step 235 following method step 230 the majority of defined positions of the uneven profile of the deflection unit are determined, in particular continuously, by means of a control unit as a function of the fourth light rays scattered back by the user's retina detected by means of the sensor or the modulation of the power of the fourth light source. In particular, it is checked at which positions of the profile of the deflection unit the fourth light rays are focused on the user's retina.
  • the first light source is controlled by the control unit in such a way that the first light rays only impinge on the determined, defined positions of the uneven profile of the deflection unit.
  • Figure 6b shows, in the form of a flow chart, a second embodiment of a method for projecting at least one image content onto the retina of a user with the aid of the optical system.
  • the image content is redirected onto an eye of a user, wherein the image content in method step 240 is projected onto the eye of a user when at least part of the image content hits a plurality of defined positions, in particular areas, of the uneven profile of the deflection unit is focused on the user's retina.
  • an input from the user regarding a diopter value of at least one eye of the user is recorded by means of a first input device, in particular of the optical system.
  • a control unit of the optical system is used to assign a defined at least one focal length, in particular a focal length, to a respective position, in particular a respective area, of the uneven profile of the deflection unit.
  • the first light source is controlled by means of the control unit in such a way that the first light rays only impinge on the plurality of defined positions of the uneven profile of the deflection unit assigned to the stored focal length.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne une unité de déviation (106a), qui est conçue en particulier pour être utilisée dans un système optique (1a) pour un affichage à balayage rétinien virtuel. Un contenu d'image est projeté sur l'unité de déviation (106a) au moyen d'une unité de projection (16a). L'unité de déviation (106a) est conçue pour diriger le contenu d'image au niveau d'un œil (24a) d'un utilisateur. L'unité de déviation (106a) présente, au moins en partie, un profil irrégulier au moins sur une surface de l'unité de déviation (106a) qui est dirigée vers l'œil (24a). Le profil est conçu de telle sorte que, lorsqu'au moins une partie du contenu d'image frappe une pluralité de positions définies du profil, le contenu d'image est focalisé sur une rétine (22a) de l'utilisateur.
PCT/EP2023/069534 2022-10-17 2023-07-13 Unité de déviation Ceased WO2024083370A1 (fr)

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