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WO2016017199A1 - Système d'observation à balayage optique - Google Patents

Système d'observation à balayage optique Download PDF

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Publication number
WO2016017199A1
WO2016017199A1 PCT/JP2015/056631 JP2015056631W WO2016017199A1 WO 2016017199 A1 WO2016017199 A1 WO 2016017199A1 JP 2015056631 W JP2015056631 W JP 2015056631W WO 2016017199 A1 WO2016017199 A1 WO 2016017199A1
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WO
WIPO (PCT)
Prior art keywords
scanning
resolution
spiral
light
path
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/JP2015/056631
Other languages
English (en)
Japanese (ja)
Inventor
聡一郎 小鹿
和真 金子
正憲 住吉
大野　渉
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.)
Olympus Corp
Original Assignee
Olympus Corp
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 Olympus Corp filed Critical Olympus Corp
Priority to JP2015550106A priority Critical patent/JPWO2016017199A1/ja
Publication of WO2016017199A1 publication Critical patent/WO2016017199A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00057—Operational features of endoscopes provided with means for testing or calibration
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00172—Optical arrangements with means for scanning
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/103—Scanning systems having movable or deformable optical fibres, light guides or waveguides as scanning elements

Definitions

  • the present invention relates to an optical scanning observation system, and more particularly to an optical scanning observation system that scans a subject to acquire an image.
  • the above-described optical scanning observation system has, for example, a predetermined scanning path by swinging the tip of an illumination fiber that is an optical fiber that guides illumination light emitted from a light source.
  • the object is scanned along the line, the return light from the object is received by a light receiving fiber that is an optical fiber disposed around the illumination fiber, and the object's light is received based on the return light received by the light receiving fiber.
  • An observation image is generated.
  • an apparatus having a configuration similar to such an optical scanning observation system for example, an endoscope apparatus disclosed in Japanese Patent Application Laid-Open No. 2010-142597 is known.
  • Japanese Unexamined Patent Application Publication No. 2010-142597 discloses that an endoscope apparatus that scans a subject in a spiral shape to obtain an observation image can selectively set normal observation and high resolution mode. A configuration is disclosed.
  • Japanese Patent Application Laid-Open No. 2010-142597 discloses that when the high resolution mode is set, the subject is scanned at twice the number of rounds of normal observation while maintaining the scanning area in normal observation.
  • a configuration for performing an operation related to acquisition of an observation image at a half frame rate of observation is disclosed.
  • the present invention has been made in view of the above-described circumstances, and provides an optical scanning observation system capable of reducing visual discomfort that may occur in accordance with a change in resolution of an observation image obtained by scanning a subject.
  • the purpose is that.
  • An optical scanning observation system includes an optical fiber configured to guide illumination light for illuminating a subject and emit the light from an exit end, and swing the exit end. Generates an actuator unit configured to displace the irradiation position of the illumination light emitted to the subject via the optical fiber, and generates a drive signal for scanning the subject along a spiral scanning path.
  • a drive signal generation unit configured to output to the actuator unit, and return light of the illumination light emitted to the subject, and generate and output a signal corresponding to the detected return light
  • a light detection unit configured as described above, an image generation unit configured to generate an observation image based on a signal output from the light detection unit, and to output the generated observation image to a display device; View When the resolution of the image is changed, control is performed to change the scanning range of the spiral scanning path according to the changed resolution while maintaining the number of revolutions in the spiral scanning path. And a configured scanning control unit.
  • FIG. The figure which shows an example of the spiral scanning path
  • FIG. which shows an example of the signal waveform of the drive signal produced
  • FIG. 1 is a diagram illustrating a configuration of a main part of an optical scanning observation system according to an embodiment.
  • the optical scanning observation system 1 includes a scanning endoscope 2 that is inserted into a body cavity of a subject, a main body device 3 that can connect the endoscope 2, and a main body
  • a display device 4 connected to the device 3 and an input device 5 capable of inputting information and giving instructions to the main device 3 are configured.
  • the endoscope 2 includes an insertion portion 11 formed with an elongated shape that can be inserted into a body cavity of a subject.
  • a connector portion 61 for detachably connecting the endoscope 2 to the connector receiving portion 62 of the main body device 3 is provided at the proximal end portion of the insertion portion 11.
  • an electrical connector device for electrically connecting the endoscope 2 and the main body device 3 is provided inside the connector portion 61 and the connector receiving portion 62.
  • an optical connector device for optically connecting the endoscope 2 and the main body device 3 is provided inside the connector portion 61 and the connector receiving portion 62.
  • An illumination fiber 12 that is an optical fiber that guides the illumination light supplied from the light source unit 21 of the main body device 3 to the illumination optical system 14 in a portion from the proximal end portion to the distal end portion inside the insertion portion 11, and
  • the incident end including the light incident surface of the illumination fiber 12 is disposed in a multiplexer 32 provided inside the main body device 3. Further, the emission end portion including the light emission surface of the illumination fiber 12 is disposed in the vicinity of the light incident surface of the lens 14 a provided at the distal end portion of the insertion portion 11.
  • the incident end portion including the light incident surface of the light receiving fiber 13 is fixedly disposed around the light emitting surface of the lens 14 b on the distal end surface of the insertion portion 11. Further, the emission end portion including the light emission surface of the light receiving fiber 13 is arranged in a duplexer 36 provided inside the main body device 3.
  • the illumination optical system 14 includes a lens 14a on which illumination light having passed through the light emission surface of the illumination fiber 12 is incident, and a lens 14b that emits illumination light having passed through the lens 14a to a subject.
  • an actuator portion 15 that is driven based on a drive signal supplied from the driver unit 22 of the main body device 3 is provided.
  • the illumination fiber 12 and the actuator unit 15 are arranged so as to have, for example, the positional relationship shown in FIG. 2 in a cross section perpendicular to the longitudinal axis direction of the insertion unit 11.
  • FIG. 2 is a cross-sectional view for explaining the configuration of the actuator unit.
  • a ferrule 41 as a joining member is disposed between the illumination fiber 12 and the actuator unit 15.
  • the ferrule 41 is made of, for example, zirconia (ceramic) or nickel.
  • the ferrule 41 is formed as a quadrangular prism, and side surfaces 42 a and 42 c that are perpendicular to the X-axis direction, which is the first axial direction orthogonal to the longitudinal axis direction of the insertion portion 11, Side surfaces 42b and 42d perpendicular to the Y-axis direction, which is the second axial direction perpendicular to the longitudinal axis direction of the insertion portion 11, are included.
  • the illumination fiber 12 is fixedly arranged at the center of the ferrule 41.
  • the ferrule 41 may be formed as a shape other than the quadrangular column as long as it has a column shape.
  • the actuator section 15 includes a piezoelectric element 15a disposed along the side surface 42a, a piezoelectric element 15b disposed along the side surface 42b, and a piezoelectric element 15c disposed along the side surface 42c. , And a piezoelectric element 15d disposed along the side surface 42d.
  • the piezoelectric elements 15a to 15d have polarization directions set individually in advance, and are configured to expand and contract in accordance with a drive signal supplied from the main body device 3.
  • a memory 16 in which endoscope information including various information related to the endoscope 2 is stored.
  • the endoscope information stored in the memory 16 is read out by the controller 25 of the main body device 3 when the connector portion 61 of the endoscope 2 and the connector receiving portion 62 of the main body device 3 are connected.
  • the main unit 3 includes a light source unit 21, a driver unit 22, a detection unit 23, a memory 24, and a controller 25.
  • the light source unit 21 includes a light source 31a, a light source 31b, a light source 31c, and a multiplexer 32.
  • the light source 31a includes a laser light source, for example, and is configured to emit red wavelength band light (hereinafter also referred to as R light) to the multiplexer 32 when light is emitted under the control of the controller 25. Yes.
  • R light red wavelength band light
  • the light source 31b includes, for example, a laser light source, and is configured to emit green wavelength band light (hereinafter also referred to as G light) to the multiplexer 32 when light is emitted under the control of the controller 25. Yes.
  • G light green wavelength band light
  • the light source 31c includes, for example, a laser light source, and is configured to emit light in a blue wavelength band (hereinafter also referred to as B light) to the multiplexer 32 when light is emitted under the control of the controller 25. Yes.
  • B light a blue wavelength band
  • the multiplexer 32 multiplexes the R light emitted from the light source 31a, the G light emitted from the light source 31b, and the B light emitted from the light source 31c onto the light incident surface of the illumination fiber 12. It is configured to supply.
  • the driver unit 22 includes a signal generator 33, D / A converters 34a and 34b, and an amplifier 35.
  • the signal generator 33 is a predetermined drive signal as shown by a broken line in FIG. 3, for example, as a first drive signal for swinging the emission end of the illumination fiber 12 in the X-axis direction.
  • a signal having a signal waveform obtained by performing the above modulation on a sine wave is generated and output to the D / A converter 34a.
  • the signal generator 33 is, for example, indicated by a one-dot chain line in FIG. 3 as a second drive signal for swinging the emission end of the illumination fiber 12 in the Y-axis direction based on the control of the controller 25.
  • a signal having a signal waveform in which the phase of the first drive signal is shifted by 90 ° is generated and output to the D / A converter 34b.
  • FIG. 3 is a diagram illustrating an example of a signal waveform of a drive signal supplied to the actuator unit.
  • the D / A converter 34 a is configured to convert the digital first drive signal output from the signal generator 33 into an analog first drive signal and output the analog first drive signal to the amplifier 35.
  • the D / A converter 34 b is configured to convert the digital second drive signal output from the signal generator 33 into an analog second drive signal and output the analog second drive signal to the amplifier 35.
  • the amplifier 35 is configured to amplify the first and second drive signals output from the D / A converters 34 a and 34 b and output the amplified signals to the actuator unit 15.
  • FIG. 4 is a diagram illustrating an example of a spiral scanning path from the center point A to the outermost point B.
  • FIG. 5 is a diagram illustrating an example of a spiral scanning path from the outermost point B to the center point A.
  • illumination light is irradiated to a position corresponding to the center point A of the irradiation position of the illumination light on the surface of the subject.
  • the irradiation position of the illumination light on the surface of the subject is first outward from the center point A as the first point.
  • illumination light is emitted to the outermost point B of the illumination light irradiation position on the surface of the subject.
  • the irradiation position of the illumination light on the surface of the subject is second inward from the outermost point B as a starting point.
  • illumination light is irradiated to the center point A on the surface of the subject.
  • the actuator unit 15 is emitted to the subject through the emission end by swinging the emission end of the illumination fiber 12 based on the first and second drive signals supplied from the driver unit 22.
  • the illumination light irradiation position can be displaced along the spiral scanning path shown in FIGS. 4 and 5.
  • the amplitude change rate in the present embodiment is the period from time T1 to time T2, which is the period during which the subject is scanned along the first spiral scanning path, taking the signal waveform of FIG. 3 as an example. Assume that the rate of increase in amplitude and the rate of decrease in amplitude during the period from time T2 to time T3, which is the period during which the subject is scanned along the second spiral scanning path, are shown.
  • the scanning range in this embodiment belongs to the inner side of the outermost peripheral path including the outermost point B of the spiral scanning path. It shall be shown as a region.
  • the detection unit 23 includes a duplexer 36, detectors 37a, 37b, and 37c, and A / D converters 38a, 38b, and 38c.
  • the demultiplexer 36 includes a dichroic mirror and the like, and separates the return light emitted from the light emitting surface of the light receiving fiber 13 into light for each of R (red), G (green), and B (blue) color components. And it is comprised so that it may radiate
  • the detector 37a includes, for example, an avalanche photodiode and the like, detects the intensity of the R light output from the duplexer 36, generates an analog R signal corresponding to the detected intensity of the R light, and generates A It is configured to output to the / D converter 38a.
  • the detector 37b includes, for example, an avalanche photodiode, detects the intensity of the G light output from the branching filter 36, generates an analog G signal corresponding to the detected intensity of the G light, and generates A It is configured to output to the / D converter 38b.
  • an avalanche photodiode detects the intensity of the G light output from the branching filter 36, generates an analog G signal corresponding to the detected intensity of the G light, and generates A It is configured to output to the / D converter 38b.
  • the detector 37c includes, for example, an avalanche photodiode and the like, detects the intensity of the B light output from the demultiplexer 36, generates an analog B signal corresponding to the detected intensity of the B light, and generates A It is configured to output to the / D converter 38c.
  • the A / D converter 38a is configured to convert the analog R signal output from the detector 37a into a digital R signal and output it to the controller 25.
  • the A / D converter 38b is configured to convert the analog G signal output from the detector 37b into a digital G signal and output it to the controller 25.
  • the A / D converter 38c is configured to convert the analog B signal output from the detector 37c into a digital B signal and output it to the controller 25.
  • the memory 24 stores, for example, information including parameters such as a signal level, a frequency, and a phase difference for specifying the signal waveform in FIG. 3 as control information used when controlling the main unit 3. Further, in the memory 24, as an image processing parameter used when generating an observation image output to the display device 4, for example, a frame rate when generating an observation image using a signal output from the detection unit 23. Information including FR is stored.
  • the controller 25 detects whether or not the insertion portion 11 is electrically connected to the main body device 3 by detecting the connection state of the connector portion 61 in the connector receiving portion 62 via a signal line or the like (not shown). It is configured to be able to. Further, the controller 25 is configured to perform an operation for reading the endoscope information from the memory 16 and storing it in the memory 24 when detecting that the insertion unit 11 is electrically connected to the main body device 3. Has been.
  • the controller 25 includes a light source control unit 25a, a scanning control unit 25b, and an image generation unit 25c.
  • the light source control unit 25a is configured to perform control for causing the light sources 31a to 31c to emit light simultaneously, for example, based on the control information read from the memory 24.
  • the scanning control unit 25b is configured to control the driver unit 22 to generate a drive signal having a signal waveform as shown in FIG. Yes.
  • the scanning control unit 25b detects that an instruction for setting the resolution of the observation image displayed on the display device 4 to a desired resolution has been given in the input device 5, the scan control unit 25b responds to the desired resolution.
  • the driver unit 22 is configured to perform control for generating a drive signal.
  • the image generation unit 25c is configured to generate an observation image at a frame rate FR based on the image processing parameters read from the memory 24. Further, the image generation unit 25c uses the R signal, the G signal, and the B signal sequentially output from the detection unit 23 during a period corresponding to the time T1 to the time T2 based on the image processing parameters read from the memory 24. Is generated, an observation image for one frame is generated using the generated pixel information, and the generated observation image is output to the display device 4. In addition, the image generation unit 25c uses the R signal, the G signal, and the B signal output from the detection unit 23 during a period corresponding to the time T2 to the time T3 based on the image processing parameters read from the memory 24. It is configured to generate an observation image for one frame using the generated pixel information, and output the generated observation image to the display device 4.
  • the display device 4 includes, for example, a monitor and is configured to display an observation image output from the main device 3.
  • the input device 5 includes, for example, a keyboard or a touch panel, and is configured to be able to give an instruction to set the resolution of the observation image displayed on the display device 4 to a desired resolution.
  • the input device 5 is not limited to being configured as a separate device from the main body device 3 as shown in FIG. 1, but may be configured as an interface integrated with the main body device 3, for example. Good.
  • the optical scanning observation system 1 having the configuration as described above will be described.
  • the case where the signal waveform of FIG. 3 is stored in the memory 24 in advance as a signal waveform corresponding to a predetermined resolution RP will be described as an example.
  • the case where the resolution of the observation image displayed on the display device 4 is changed from a predetermined resolution RP (current resolution) will be described as an example.
  • a user such as a surgeon connects each part of the optical scanning observation system 1 and turns on the power, and then operates the input device 5 to change the resolution of the observation image displayed on the display device 4 to a predetermined resolution RP.
  • An instruction is given to set a lower resolution RL.
  • the resolution RL is determined based on, for example, the core diameter of the illumination fiber 12, the lens diameter of each lens included in the illumination optical system 14, and / or the frequency characteristics of the piezoelectric elements 15a to 15d. As long as it does not fall below the lower limit, it may be set to an arbitrary size.
  • the light source control unit 25a performs control for causing the light sources 31a, 31b, and 31c to emit light simultaneously based on the control information read from the memory 24 after the power of the main body device 3 is turned on.
  • white light including R light, G light, and B light is supplied to the illumination fiber 12 as illumination light.
  • the scanning control unit 25b specifies the signal waveform of FIG. 3 based on the control information read from the memory 24 after the main unit 3 is turned on.
  • the scanning control unit 25b When the scanning control unit 25b detects that an instruction for setting the resolution of the observation image displayed on the display device 4 to the resolution RL is given in the input device 5, the scanning control unit 25b maintains the frequency of the signal waveform in FIG. For example, by setting the amplitude change rate in the signal waveform of FIG. 3 to an amplitude change rate AH larger than the amplitude change rate AP, for example, the driver performs control for generating a drive signal having a signal waveform as shown in FIG. This is performed for the unit 22. In other words, when the scanning control unit 25b detects that an instruction for setting the resolution of the observation image displayed on the display device 4 to the resolution RL is given in the input device 5, the signal corresponding to the resolution RL is detected. The driver unit 22 is controlled to generate a drive signal having a waveform.
  • FIG. 6 is a diagram illustrating an example of a signal waveform of a drive signal generated when the resolution of the observation image is set to RL.
  • the scanning range by the spiral scanning path is set to the resolution RL while maintaining the number of revolutions in the spiral scanning path. Will be expanded accordingly.
  • FIG. 7 is a diagram illustrating an example of a spiral scanning path from the center point A to the outermost point B when the resolution of the observation image is set to RL.
  • FIG. 8 is a diagram illustrating an example of a spiral scanning path from the outermost point B to the center point A when the resolution of the observation image is set to RL.
  • An image is displayed on the display device 4.
  • the user connects each part of the optical scanning observation system 1 and turns on the power, and then operates the input device 5 so that the resolution of the observation image displayed on the display device 4 is higher than a predetermined resolution RP.
  • An instruction for setting the resolution RH is given.
  • the resolution RH is set to an arbitrary size as long as it does not exceed a predetermined upper limit determined based on, for example, the core diameter of the illumination fiber 12 and the frequency characteristics of the piezoelectric elements 15a to 15d. May be.
  • the scanning control unit 25b When the scanning control unit 25b detects that an instruction for setting the resolution of the observation image displayed on the display device 4 to the resolution RH is given in the input device 5, the scanning control unit 25b maintains the frequency of the signal waveform in FIG. For example, by setting the amplitude change rate in the signal waveform of FIG. 3 to an amplitude change rate AL smaller than the amplitude change rate AP, for example, a driver performs control for generating a drive signal having a signal waveform as shown in FIG. This is performed for the unit 22. That is, when the scanning control unit 25b detects that an instruction for setting the resolution of the observation image displayed on the display device 4 to the resolution RH has been issued in the input device 5, a signal corresponding to the resolution RH is detected. The driver unit 22 is controlled to generate a drive signal having a waveform.
  • FIG. 9 is a diagram illustrating an example of a signal waveform of a drive signal generated when the resolution of the observation image is set to RH.
  • the scanning range by the spiral scan path is set to the resolution RH while maintaining the number of revolutions in the spiral scan path. Reduced accordingly.
  • FIG. 10 is a diagram illustrating an example of a spiral scanning path from the center point A to the outermost point B when the resolution of the observation image is set to RH.
  • FIG. 11 is a diagram illustrating an example of a spiral scanning path from the outermost point B to the center point A when the resolution of the observation image is set to RH.
  • an observation image having a narrow angle of view and a high resolution is obtained as an observation image corresponding to the resolution RH compared to the case where the predetermined resolution RP is set.
  • An image is displayed on the display device 4.
  • a signal waveform set to a frequency lower than the frequency of the signal waveform of FIG. 3 while maintaining the amplitude change rate of the signal waveform of FIG. Control for generating a drive signal including the above may be performed in the scanning control unit 25b.
  • Control for generating a drive signal including the above may be performed in the scanning control unit 25b.
  • the frequency of the drive signal is set to a frequency close to the resonance frequency of the piezoelectric elements 15a to 15d according to such control, for example, the amplitude change rate is lower than the amplitude change rate of the signal waveform in FIG.
  • the scanning range by the spiral scanning path may be maintained (so as not to be expanded).
  • the resolution of the observation image displayed on the display device 4 can be changed without changing the frame rate FR. Therefore, according to the present embodiment, it is possible to reduce the visual discomfort that can be caused by changing the resolution of the observation image obtained by scanning the subject.
  • the present embodiment is not limited to the one applied to the optical scanning observation system 1 configured to scan the subject by simultaneously irradiating the R light, the G light, and the B light.
  • the present invention can also be applied to an optical scanning observation system 1A configured to scan an object by sequentially irradiating R light, G light, and B light as shown in FIG.
  • FIG. 12 is a diagram illustrating a configuration of a main part of an optical scanning observation system according to a modification example of the embodiment.
  • optical scanning observation system 1A a specific configuration of the optical scanning observation system 1A will be described. In the following, for the sake of simplicity, detailed description of portions to which the same configuration as that of the optical scanning observation system 1 can be applied is omitted as appropriate.
  • an optical scanning observation system 1A includes an endoscope 2, a main body device 3A to which the endoscope 2 can be connected, a display device 4 connected to the main body device 3A, and a main body device. And an input device 5 capable of inputting and instructing information to 3A.
  • the main device 3A includes a light source unit 21, a driver unit 22, a detection unit 23A, a memory 24, and a controller 25.
  • the detection unit 23A includes a detector 37d and an A / D converter 38d.
  • the detector 37d includes, for example, an avalanche photodiode and generates an analog signal corresponding to the intensity of return light (R light, G light, and B light) sequentially emitted from the light emitting surface of the light receiving fiber 13. And output to the A / D converter 38d.
  • the A / D converter 38d is configured to convert the analog signal output from the detector 37d into a digital signal and output it to the controller 25.
  • the light source control unit 25a of the optical scanning observation system 1A is configured to perform control for causing the light sources 31a, 31b, and 31c to emit light sequentially and periodically based on the control information read from the memory 24.
  • the illumination light irradiated along the spiral scanning path is periodically and sequentially in the order of R light ⁇ G light ⁇ B light ⁇ R light. Switch.
  • the same control as that of the optical scanning observation system 1 can be performed in the scanning control unit 25b.
  • the same effects as the scanning observation system 1 can be obtained.
  • the optical scanning observation system 1A by performing control to change the signal waveform of the drive signal generated in the scanning control unit 25b, along the spiral scanning path.
  • the combination of the light emission interval of the light sources 31a, 31b, and 31c and the sampling frequency of the A / D converter 38d is changed without changing the radial resolution of the image obtained by scanning the subject.
  • the circumferential resolution of the image may be changed.
  • the frequency in the spiral scanning path is increased.
  • the resolution in the circumferential direction of an image obtained by scanning the subject along the spiral scanning path can be improved while maintaining the number of times.
  • the peripheral in the spiral scanning path is performed. The resolution in the circumferential direction of the image obtained by scanning the subject along the spiral scanning path can be reduced while maintaining the number of times.

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Abstract

L'invention concerne un système d'observation à balayage optique comprenant une fibre optique qui guide une lumière d'éclairage destinée à éclairer un sujet, une unité actionneur qui déplace l'emplacement éclairé par la lumière d'éclairage émise sur le sujet par l'intermédiaire de la fibre optique, une unité de génération de signal d'entraînement qui génère et émet en sortie un signal d'entraînement pour balayer le sujet le long d'un trajet de balayage en spirale, une unité de détection optique qui détecte une lumière renvoyée de la lumière d'éclairage et génère et émet en sortie un signal correspondant à la lumière renvoyée détectée, une unité de génération d'images qui génère une image d'observation en fonction du signal émis en sortie par l'unité de détection optique et qui émet en sortie l'image d'observation générée vers un dispositif d'affichage, ainsi qu'une unité de commande de balayage qui, lorsque la résolution de l'image d'observation est modifiée, effectue une commande pour modifier la zone de balayage du trajet de balayage en spirale en fonction de la résolution après le changement, tout en maintenant le nombre de circulations sur le trajet de balayage en spirale.
PCT/JP2015/056631 2014-07-31 2015-03-06 Système d'observation à balayage optique Ceased WO2016017199A1 (fr)

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JP2014156866 2014-07-31
JP2014-156866 2014-07-31

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