JP5231802B2 - Ophthalmic imaging equipment - Google Patents

Ophthalmic imaging equipment Download PDF

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JP5231802B2
JP5231802B2 JP2007341514A JP2007341514A JP5231802B2 JP 5231802 B2 JP5231802 B2 JP 5231802B2 JP 2007341514 A JP2007341514 A JP 2007341514A JP 2007341514 A JP2007341514 A JP 2007341514A JP 5231802 B2 JP5231802 B2 JP 5231802B2
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position
display
tomographic image
eye
scanning
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JP2009160190A (en
JP2009160190A5 (en
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俊夫 村田
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株式会社ニデック
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  The present invention relates to an ophthalmologic imaging apparatus that acquires a tomographic image of an eye to be examined using low coherent light.

  Optical coherence tomography (OCT) using low-coherent light is known as an ophthalmic imaging apparatus that can obtain tomographic images of the eye to be examined (for example, fundus, anterior eye segment, etc.) non-invasively. Yes. In such an ophthalmologic photographing apparatus, for example, a tomographic image is obtained by obtaining information in the depth direction of an eye to be examined using an OCT optical system while scanning measurement light one-dimensionally on the fundus (Patent Literature). 1).

  In addition, the above-described apparatus has a configuration in which an OCT optical system is combined with a scanning laser ophthalmoscope (SLO optical system) for acquiring a front image of an eye to be examined or an imaging optical system having a two-dimensional imaging element. It is known that the examiner changes the imaging position in the vertical and horizontal directions of the subject's eye while moving the measurement line on the front image of the subject's eye displayed on the display by a predetermined switch operation, and takes a tomographic image. The position is determined.

In addition, in the apparatus as described above, after determining the imaging position of the tomographic image as described above, the examiner displays the tomographic image displayed on the display monitor in order to observe the desired fundus region with suitable imaging sensitivity. The optical path length of the reference light is changed while looking at
JP 2007-151622 A

  However, in the case of the conventional apparatus configuration, an operation for changing the imaging position in the vertical and horizontal directions or the acquisition of the reference light after obtaining the tomographic image, which is required until the examiner observes the desired fundus site under the desired imaging conditions. The operation of changing the optical path length is not necessarily performed with an intuitive sense of operation of the examiner, and requires a lot of labor for the examiner. Further, in the case of an inexperienced examiner, there may be a possibility that the examiner cannot find a desired fundus site.

  In view of the above problems, it is an object of the present invention to provide an ophthalmologic photographing apparatus that can smoothly observe a fundus site desired by an examiner.

  In order to solve the above problems, the present invention is characterized by having the following configuration.

(1)
The light emitted from the measurement light source is divided into reference light and measurement light, and irradiation means for irradiating the measurement light toward the eye to be examined, and scanning for scanning the measurement light emitted to the eye to be examined by the irradiation means And an optical path difference changing means for changing an optical path difference between the optical path length of the reference light and the optical path length of the measurement light applied to the eye to be examined, and a combination of the reference light and the reflected light of the measurement light. In an ophthalmologic photographing apparatus comprising: an interference optical system that continuously obtains tomographic images of an eye to be examined by receiving the interference light generated; and display means that displays the tomographic images acquired by the interference optical system as moving images ,
The display means includes a card for designating an arbitrary position on the display screen of the display means.
-Sol appears,
A pointing device for moving the cursor on the display screen of the display means;
Control means capable of setting a plurality of shooting conditions based on the position of the cursor on the display screen of the display means and an operation signal from the pointing device ;
The control means is based on an operation signal output from the pointing device when the cursor is placed on a tomographic image display area set on the display screen as an area for displaying a moving image of the tomographic image. Then, the optical path difference is changed by the optical path difference changing means, and a moving image of a tomographic image obtained after the optical path difference is changed is displayed on the display means .
(2)
In the ophthalmologic photographing apparatus of (1),
The position specifying means comprises a pointing device for moving the cursor on the display screen of the display means,
The pointing device further includes a pressing detection means for detecting that the pointing device is pressed by the examiner's hand,
The control means outputs a detection signal from the press detection means in a state where the cursor is placed in a display area of the tomographic image on the display screen of the display means, and the detection signal is output. The movement information of the designated position is acquired based on the operation signal output from the pointing device as it is,
Based on the movement information of the designated position in the vertical direction of the position designation means, one of the optical path difference changing means or the scanning means is controlled, and based on the movement information of the designated position in the left-right direction of the position designation means. The other of the optical path difference changing means and the scanning means is controlled.
(3)
In the ophthalmologic photographing apparatus of (1),
When the cursor is placed on a front image display region set as a region for displaying a fundus front image, the control unit controls the eye to be inspected by the scanning unit based on an operation signal output from the pointing device. Changing the scanning position of the measurement light in the above, and displaying the tomographic image acquired after the scanning position is changed as a moving image on the display means,
A change in imaging position in the depth direction of a predetermined eye part in a tomographic image acquired after the scanning position is changed is detected, and based on the detection result, a predetermined value set before the change of the scanning position is detected. The optical path difference changing unit is controlled so that a deviation of a photographing position in a depth direction of the predetermined eye part to be examined with respect to a reference position is corrected.


  According to the present invention, the fundus site desired by the examiner can be observed smoothly.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an optical system and a control system of the ophthalmologic photographing apparatus according to the present embodiment. In the present embodiment, the horizontal direction component on the plane perpendicular to the depth direction (the same plane as the subject's face) is X as the depth (depth) direction of the eye to be examined. The direction and vertical direction components will be described as the Y direction.

  In FIG. 1, the optical system uses an interference optical system (hereinafter referred to as an OCT optical system) 200 for non-invasively obtaining a tomographic image of the fundus of the eye to be examined using an optical interference technique, and infrared light. It is roughly divided into a scanning laser ophthalmoscope (SLO) optical system 300 that acquires a fundus SLO image for illuminating and observing the fundus of the eye to be examined. These optical systems are mounted in a housing (not shown), and the housing is three-dimensionally moved with respect to the eye to be examined by a predetermined alignment moving mechanism via an operation member such as a joystick. Is done.

  Reference numeral 40 denotes a dichroic mirror as a light splitting member and a light coupling member, which reflects measurement light (for example, around λ = 840 nm) emitted from the measurement light source 27 used in the OCT optical system 200 and reflects it to the SLO optical system 300. It has a characteristic of transmitting laser light (for example, near λ = 780 nm) emitted from the SLO light source 61 used. In this case, the dichroic mirror 40 makes the measurement optical axis L2 of the OCT optical system 200 and the measurement optical axis L1 of the SLO optical system 300 coaxial.

  First, the configuration of the OCT optical system 200 provided on the reflection side of the dichroic mirror 40 will be described. Reference numeral 27 denotes an OCT light source that emits low-coherent light used as measurement light and reference light of the OCT optical system 200. For example, an SLD light source is used. For the OCT light source 27, for example, a light source having a center wavelength of 840 nm and a bandwidth of 50 nm is used. Reference numeral 26 denotes a fiber coupler that doubles as a light splitting member and a light coupling member. The light emitted from the OCT light source 27 is split into reference light and measurement light by the fiber coupler 26 via an optical fiber 38a as a light guide. The measurement light goes to the eye E through the optical fiber 38b, and the reference light goes to the reference mirror 31 through the optical fiber 38c.

  In the optical path for emitting the measurement light toward the eye E, the end 39b of the optical fiber 38b for emitting the measurement light, the collimator lens 25, and a relay lens (movable in the optical axis direction in accordance with the refractive error of the eye to be examined) A focusing unit 24, and a scanning unit 23 including a combination of two galvanometer mirrors capable of scanning the measurement light in the XY directions on the fundus by driving the scanning drive mechanism 51 are disposed. The dichroic mirror 40 and the objective lens 10 serve as a light guide optical system that guides OCT measurement light from the OCT optical system 200 to the fundus of the eye to be examined. Note that the scanning unit 23 of the present embodiment has a configuration in which the scanning direction of the measurement light to be scanned on the fundus can be arbitrarily set by arbitrarily adjusting the reflection angle of the measurement light by the two galvanometer mirrors. Yes. Therefore, it is possible to obtain a tomographic image of an arbitrary region of the fundus of the eye to be examined. For example, by scanning the measurement light in an oblique direction with respect to the fundus, it is possible to obtain a tomographic image when the fundus of the eye to be examined is cut obliquely, and scanning the measurement light in a round shape with respect to the fundus By doing so, it is possible to obtain a tomographic image at a certain distance from a predetermined position on the fundus of the eye to be examined. Note that the end 39b of the optical fiber 38b is disposed so as to be conjugate with the fundus of the eye to be examined. Further, the two galvanometer mirrors of the scanning unit 23 are arranged at a position substantially conjugate with the eye pupil to be examined.

  The measurement light emitted from the end 39b of the optical fiber 38b is converted into a parallel beam by the collimator lens 25, reaches the scanning unit 23 via the relay lens 24, and the reflection direction is changed by driving the two galvanometer mirrors. Then, the measurement light reflected by the scanning unit 23 is reflected by the dichroic mirror 40 and then condensed on the fundus of the eye to be examined via the objective lens 10.

  Then, the measurement light reflected from the fundus is reflected by the dichroic mirror 40 through the objective lens 10, travels to the OCT optical system 200, and passes through the two galvanometer mirrors of the scanning unit 23 and the relay lens 24, and the collimator lens 25. And is incident on the end 39b of the optical fiber 38b. The measurement light incident on the end 39b reaches the end 84a through the optical fiber 38b, the fiber coupler 26, and the optical fiber 38d.

  On the other hand, an end portion 39c of an optical fiber 38c that emits the reference light, a collimator lens 29, and the reference mirror 31 are arranged in the optical path that emits the reference light toward the reference mirror 31. The reference mirror 31 is configured to be movable in the optical axis direction by the reference mirror drive mechanism 50 in order to change the optical path length of the reference light.

  The reference light emitted from the end 39c of the optical fiber 38c is converted into a parallel light beam by the collimator lens 29, reflected by the reference mirror 31, collected by the collimator lens 29, and incident on the end 39c of the optical fiber 38c. The reference light incident on the end 39c reaches the fiber coupler 26 through the optical fiber 38c.

  Then, the reflected light of the measurement light irradiated on the fundus and the reference light generated as described above are combined by the fiber coupler 26 to be interference light, and then emitted from the end portion 84a through the optical fiber 38d. A spectroscopic optical system 800 (spectrometer unit) 800 separates interference light into frequency components in order to obtain an interference signal for each frequency, and includes a collimator lens 80, a grating mirror (diffraction grating) 81, a condensing lens 82, and a light receiving element. 83. The light receiving element 83 is a one-dimensional element (line sensor) having sensitivity in the infrared region.

  Here, the interference light emitted from the end portion 84 a is collimated by the collimator lens 80, and then is split into frequency components by the grating mirror 81. Then, the interference light split into frequency components is condensed on the light receiving surface of the light receiving element 83 via the condenser lens 82. Thereby, spectrum information of interference fringes is recorded on the light receiving element 83. Then, the spectrum information is input to the control unit 70 and analyzed using Fourier transform, whereby information in the depth direction of the subject's eye can be measured. Here, the control unit 70 can acquire a tomographic image by causing the scanning unit 23 to scan the measurement light on the fundus in a predetermined transverse direction. For example, a tomographic image on the XZ plane or YZ plane of the fundus of the eye to be examined can be acquired by scanning in the X direction or the Y direction (Note that in this embodiment, the measurement light is one-dimensionally scanned with respect to the fundus in this way. And a method for obtaining a tomographic image is referred to as a B-scan). The acquired tomographic image is stored in a memory 72 connected to the control unit 70. Furthermore, it is also possible to acquire a three-dimensional image of the fundus of the eye to be examined by two-dimensionally scanning the measurement light in the XY direction.

  Next, the SLO optical system (confocal optical system) 300 disposed in the transmission direction of the dichroic mirror 40 will be described. Reference numeral 61 denotes an SLO light source that emits highly coherent light. For example, a laser diode light source of λ = 780 nm is used. In the optical path for emitting laser light emitted from the SLO light source 61 toward the eye E to be examined, the relay lens 63 that can move in the optical axis direction according to the refractive error of the eye to be examined, and the scanning drive mechanism 52 are driven on the fundus. A scanning unit 64, a relay lens 65, and an objective lens 10, which are a combination of a galvanometer mirror and a polygon mirror capable of scanning measurement light at high speed in the XY directions, are arranged. Further, the reflection surfaces of the galvanometer mirror and the polygon mirror of the scanning unit 23 are arranged at a position substantially conjugate with the eye pupil to be examined. Note that the scanning unit 64 included in the SLO optical system 300 in the present embodiment has a configuration different from that of the scanning unit 23 included in the OCT optical system 200 described above.

  A beam splitter 62 is disposed between the SLO light source 61 and the relay lens 63. In the reflection direction of the beam splitter 62, a condensing lens 66 for constituting a confocal optical system, a confocal aperture 67 placed at a conjugate position to the fundus, and an SLO light receiving element 68 are provided. Yes.

  Here, the laser light (measurement light) emitted from the SLO light source 61 passes through the beam splitter 62, then reaches the scanning unit 64 via the relay lens 63, and the reflection direction is driven by driving the galvanometer mirror and polygon mirror. be changed. The laser light reflected by the scanning unit 64 is transmitted through the dichroic mirror 40 via the relay lens 65 and then condensed on the fundus of the eye to be examined via the objective lens 10.

The laser light reflected from the fundus is reflected by the beam splitter 62 via the objective lens 10, the relay lens 65, the galvano mirror and polygon mirror of the scanning unit 64, and the relay lens 63. Thereafter, the light is condensed by the condenser lens 66 and then detected by the light receiving element 68 through the confocal aperture 67. Then, the light reception signal detected by the light receiving element 68 is input to the control unit 70. The control unit 70 acquires a front image of the fundus of the eye to be examined based on the light reception signal obtained by the light receiving element 68. The acquired front image is stored in the memory 72.

The control unit 70 is connected to the display display 75 and controls the display image. Further, a memory 72 and a mouse 76 used as a pointing device are connected to the control unit 70. Note that the mouse 76 in the present embodiment has a sensor for detecting a movement signal when the body of the mouse 76 is two-dimensionally moved by the examiner's hand, and for detecting that the mouse 76 is pressed by the examiner's hand. The left and right mouse buttons and a wheel mechanism that can rotate in the front-rear direction are provided between the left and right mouse buttons.

  Next, a method of acquiring a tomographic image (B scan image) on the XZ plane by B scan will be described. FIG. 2 is a diagram for explaining an operation when sequentially acquiring an OCT image by B scan and an SLO image by two-dimensional scan. Here, the control unit 70 turns on the irradiation light irradiated on the fundus of the eye to be inspected via the OCT optical system 200 in order to obtain the fundus image of the eye to be examined by alternately turning on the OCT light source 27 and the SLO light source 61. Switching is performed between the irradiated measurement light and the laser light irradiated via the SLO optical system. Therefore, an interference signal detected by the light receiving element 83 disposed in the OCT optical system 200 and a light reception signal detected by the light receiving element 68 disposed in the SLO optical system 300 are sequentially input to the control unit 70.

  Here, the control unit 70 divides the upper and lower end areas (hatched portions in FIG. 2) of the scanning area for one frame of the SLO image that hardly affect the image acquisition for the time required for the OCT image acquisition. The SLO light source 61 is turned OFF while it is located in that area. Then, while the SLO light source 61 is OFF, the OCT light source 27 is turned ON and an OCT image is acquired by B scan. And the control part 70 performs such control continuously, and displays the SLO image and OCT image which were obtained alternately as a moving image on the display display 75 simultaneously. For detailed operation of this configuration, refer to Japanese Patent Application No. 2006-204425 by the present applicant.

  The operation of the apparatus having the above configuration will be described. FIG. 3 is an example of a display screen displayed on the display 75. The control unit 70 has a cursor 100 that can move the entire screen of the display 75 on the display 75, a tomographic image 201 acquired by the OCT optical system 200, an SLO image 301 acquired by the SLO optical system 300, and the eye fundus to be examined. A focus adjustment unit 400 for adjusting the focus, an autocoherence button 403, an optical path length adjustment unit 410, an anterior ocular segment observation image 500 photographed by an anterior ocular segment observation camera (not shown) provided in the apparatus are connected. ing. The control unit 70 moves the cursor 100 on the screen of the display 75 based on an operation signal output from the mouse 76 when being moved two-dimensionally by the examiner. In the present embodiment, the imaging condition can be set by performing a click operation or a drag operation while the examiner operates the mouse 76 and moves the cursor 100 to a desired position on the display 75. It has become. In this case, the cursor 100 is used for designating an arbitrary position on the display 75.

  First, the examiner performs alignment so that the measurement optical axis is at the center of the pupil of the subject's eye while viewing the anterior segment image 500 displayed on the display 75, and causes the subject to gaze at a movable fixation lamp (not shown). Then, it leads to the measurement site desired by the examiner.

  Then, while examining the SLO image 301 displayed on the display display 75, the examiner moves the cursor 100 to the slider 400a displayed on the focus adjustment unit 400 using the mouse 76 and performs a drag operation, thereby performing a drag operation. Adjust the focus. In this case, the control unit 70 moves the lens 24 and the lens 63 in the optical axis direction according to the display position of the slider 400a.

  Next, when a click operation is performed with the mouse 76 in a state where the cursor 100 is placed on the autocoherence button 403 displayed on the display 75, the control unit 70 controls the drive mechanism 50 to detect the OCT signal. The reference mirror 31 is automatically moved until In this case, the examiner can manually adjust the optical path length of the reference light by moving the cursor 100 to the slider 410 a displayed on the optical path length adjustment unit 410 using the mouse 76 and performing a drag operation. . In this case, the control unit 70 moves the reference mirror 31 using the drive mechanism 50 according to the display position of the slider 410a.

  Here, when the OCT signal of the light receiving element 83 is detected, the control unit 70 alternately turns on the OCT light source 27 and the SLO light source 61 as described above, and acquires the OCT image and the SLO image alternately. The acquired image is displayed on the screen of the display 75.

  Here, the control unit 70 updates the OCT image and the SLO image displayed on the display 75 as needed every time one frame of each of the OCT image and the SLO image is acquired. In this way, the front image by the SLO optical system 300 and the tomographic image by the OCT optical system 200 can be observed almost simultaneously at the moving image rate. The initial OCT image acquisition position that does not depend on the examiner's setting may be, for example, a predetermined area in the horizontal direction from the center position of the SLO image.

  When the OCT image and the SLO image are displayed on the same screen, the examiner sets the position of the tomographic image that the examiner wants to photograph from the SLO image on the display display 75 that is observed in real time. Here, the examiner uses the mouse 76 to perform a drag operation by placing the cursor 100 on the line LS representing the measurement position (acquisition position) electrically displayed on the SLO image on the screen and performing a drag operation. The line LS is moved with respect to the fundus image, and the measurement position is set. If the line LS is set to be in the X direction, a tomographic image on the XZ plane is taken. If the line LS is set to be in the Y direction, a tomographic image on the YZ plane is taken. It has become. Further, the line LS may be set to an arbitrary shape (for example, an oblique direction or a circle).

  Then, the control unit 70 performs an XZ plane tomographic image capturing operation by B-scan based on the set measurement position. That is, the control unit 70 drives the scanning unit 23 to measure the measurement light so that a tomographic image of the fundus oculi at the position of the line LS is obtained based on the display position of the line LS set on the SLO image on the screen. To scan. Since the relationship between the display position of the line LS (coordinate position on the monitor) and the scanning position of the measurement light by the scanning unit 23 is determined in advance, the control unit 70 performs scanning corresponding to the set display position of the line LS. The two galvanometer mirrors of the scanning unit 23 are appropriately driven and controlled so that the measurement light is scanned over the range.

  Here, when the line LS is moved with respect to the SLO fundus image by the examiner, the control unit 70 sets the measurement position at any time, and acquires the tomographic image at the corresponding measurement position. Then, the acquired tomographic image is displayed on the display screen of the display 75 as needed. In this way, when the tomographic image desired by the examiner is displayed on the display 75, the desired tomographic image and the front image are stored in the memory 72 by a predetermined examiner operation.

  In the above configuration, it is also possible to correct the tomographic image by detecting the positional deviation of the eye to be examined based on the SLO image at the time of acquiring the tomographic image. In this case, the feature point (blood vessel shape and optic nerve head) of the fundus of the eye to be examined is extracted from the obtained SLO image by image processing, and the displacement of the eye to be examined is detected by obtaining the deviation amount of the extracted feature point. Is possible. Then, the control unit 70 drives and controls the scanning unit 23 based on the detected positional deviation amount of the eye to correct the measurement position by the positional deviation amount (the display position of the line LS may be corrected). Even if the subject's eye moves during the measurement, a constant tomographic image can be observed without being affected by it. In addition, the control unit 70 can correct the positional deviation of the eye to be examined by controlling a driving unit (not shown) so as to move the entire apparatus main body based on the detected positional deviation of the eye.

  In addition, the control unit 70 determines the optical path length of the reference light and the optical path of the measurement light based on the specified position information of the specified position specified at an arbitrary position on the tomographic image by the pointing device such as the mouse 76 or the movement information of the specified position. The optical path difference from the length is changed, and the depth position of the eye to be examined corresponding to the reference light is changed. Further, the control unit 70 scans the measurement light based on the specified position information of the specified position or the movement information of the specified position, and changes the scan position of the measurement light on the eye to be examined.

  Further, the control unit 70 detects the eye corresponding to the reference light based on the designated position information in the vertical direction of the designated position designated at an arbitrary position on the tomographic image by the pointing device such as the mouse 76 or the movement information of the designated position. Control of one of the change of the depth position or the change of the scanning position of the measuring light, and based on the designated position information of the designated position in the left-right direction or the movement information of the designated position, The other change control of the change of the depth position or the change of the scanning position of the measurement light is performed.

  More specifically, the control unit 70 operates the operation signal output from the mouse 76 in a state where the cursor 100 is placed on the tomographic image display area 201R set as an area for displaying the tomographic image 201 on the display 75. Based on the above, the depth position of the eye to be examined or the scanning position of the measurement light corresponding to the reference light is changed. In this case, the memory 72 stores the display position (coordinate position) of the tomographic image display area 201R on the display 75.

    When a tomographic image is captured as described above and the tomographic image 201 is displayed in the tomographic image display area 201R on the display 75, and then the depth position of the eye to be examined or the scanning position of the measurement light corresponding to the reference light is to be changed. The examiner operates the mouse 76 to move the cursor 100 to the tomographic image 201 and performs a predetermined operation (for example, a drag operation or a click operation) on the tomographic image 201.

  For example, the control unit 70 clicks the mouse 76 with the cursor 100 placed on the tomographic image display area 201R, and moves (drags) the mouse 76 in an arbitrary direction on the horizontal plane in the clicked state. And the depth position of the eye to be examined corresponding to the reference light and the scanning of the measurement light so that the tomographic image 201 is moved in the display area 201R following the cursor 100 moved according to the operation direction of the mouse 76. The position is changed (see FIG. 4).

  In this case, the control unit 70 in the vertical direction and the horizontal direction specified by the cursor 100 based on the operation signal output from the mouse 76 while the detection signal from the mouse button provided on the mouse 76 is output. Get the movement information of the specified position.

  Here, as shown in FIG. 4A, when the mouse 76 is moved in the front-rear direction while the tomographic image 201 is clicked, a drag operation in the vertical direction with respect to the tomographic image 201 on the display 75 is performed. Then, the control unit 80 moves the cursor 100 in the vertical direction based on the operation signal, and the tomographic image 201 is moved following the movement of the cursor 100 as shown in FIG. In this way, the optical path length of the reference light is changed by moving the reference mirror 31 using the drive mechanism 50.

  At this time, the control unit 70 moves the reference mirror 31 in a direction in which the optical path length of the reference light becomes longer when the mouse 76 is moved in the forward direction, and moves the reference light in the direction in which the mouse 76 moves backward. The reference mirror 31 is moved in the direction in which the optical path length becomes shorter. When the optical path length of the reference light is changed by the movement of the reference mirror 31, as a result, the optical path difference between the optical path length of the reference light and the optical path length of the measurement light is changed, and the optical path length of the reference light (light source 27) is changed. The depth position on the fundus where the optical path length is equal to that of the reference mirror 31 to the spectroscopic optical system 800 is changed. Thereby, the depth position on the fundus corresponding to the optical path length of the reference light is changed.

  Then, when the reference mirror 31 is moved as described above and the tomographic image acquired after the optical path length of the reference light is changed is displayed on the display 75, as a result, the retina, pigment epithelium, choroid, etc. Is displayed so as to move vertically on the display 75. At this time, when the mouse 76 is moved in the forward direction, the fundus tomographic image is moved upward, and when the mouse 76 is moved in the backward direction, the fundus tomographic image is displayed on the display 75 so as to move downward. Is done.

  The control unit 70 detects the amount of movement of the mouse 76 in the front-rear direction from the drag start position on the basis of the position where the drag operation is started based on the operation signal output from the mouse 76, and in the vertical direction. The movement information of the designated position is acquired, and the reference mirror 31 is moved based on the movement information. The memory 72 stores a calculation table indicating the amount of movement of the reference mirror 31 when the mouse 76 is moved by a predetermined amount from the drag start position, and the control unit 80 detects the mouse detected as described above. The amount of movement of the reference mirror 31 is obtained by obtaining the amount of movement of the reference mirror 31 corresponding to the amount of forward and backward movement of 76 from the calculation table.

  In this embodiment, when the mouse 76 is moved back and forth, dragging is started so that the amount of displacement of the display position in the vertical direction of the cursor 100 is equal to the amount of displacement of the display position in the vertical direction of the tomographic image 201. The correspondence between the amount of movement of the mouse 76 in the front-rear direction from the position and the amount of movement of the reference mirror 31 is set. Therefore, the reference mirror 31 is moved so that the tomographic image 201 is displayed on the display 75 so as to follow the cursor 100 moved by the drag operation on the mouse 76.

In the above configuration, the control unit 70 moves the reference mirror 31 whenever necessary to acquire the tomographic image, updates the already displayed tomographic image, and newly acquires the tomographic image. Is displayed on the display 75, when the mouse 76 is dragged, the examiner can observe the change in imaging sensitivity of the fundus site displayed on the screen in real time. It is easy to adjust to shooting conditions. in this case,
In addition, the tomographic imaging sensitivity is the maximum for the image acquired at a depth position where the optical path length is equal to the reference light, and the imaging sensitivity increases as the distance from the depth position corresponding to the optical path length of the reference light increases. Lower. In this embodiment, since the tomographic image displayed at the upper limit of the tomographic image display area 201R on the display 75 is a tomographic image corresponding to the movement position of the reference mirror 31, it is displayed near the upper limit of the tomographic image display area R. The tomographic image with the highest imaging sensitivity is displayed, and the tomographic image with the imaging sensitivity decreasing in the downward direction is displayed.

  According to the configuration as described above, the examiner performs a drag operation on the tomographic image 201 using the mouse 76, whereby the desired fundus site (for example, retina, choroid, etc.) is displayed with a high imaging sensitivity. Therefore, the fundus region desired by the examiner can be observed smoothly by the intuitive operation feeling of the examiner. In the above description, it is assumed that the display position of the tomographic image moves up and down in accordance with the change in the depth position of the eye to be examined corresponding to the optical path length of the reference light. As long as the depth position of the eye to be examined corresponding to the optical path length of the reference light is changed, various modifications are possible.

  Next, the case where a drag operation in the horizontal direction with the mouse 76 is performed on the tomographic image on the display 75 will be described with reference to FIG. Here, as shown in FIG. 5A, the mouse 76 is moved in the left-right direction while the tomographic image 201 is clicked, so that a drag operation in the left-right direction with respect to the tomographic image 201 on the display 75 is performed. When the operation is performed, the cursor 100 is moved in the left-right direction based on the operation signal, and scanning drive is performed so that the tomographic image 201 is moved following the movement of the cursor 100 as shown in FIG. By changing the scanning position of the galvanometer mirror 23 using the mechanism 52, the scanning position (irradiation position) of the measurement light on the fundus of the eye to be examined when acquiring a tomographic image is changed.

  The driveable range (rotatable range) of each galvanometer mirror 23 set for acquiring a tomographic image is set wider than the drive range (rotation angle) of the galvanomirror 23 when acquiring a single tomographic image. Therefore, the control unit 70 selects a predetermined driving position from the drivable range while setting the driving range of the galvano mirror 23 constant when acquiring one tomographic image. More specifically, the mirror rotation start angle and the rotation completion angle are changed while the width of the rotation angle of the mirror when acquiring one tomographic image is constant (the center position of the mirror deflection angle (the rotation center)). Change position)). Accordingly, the scanning position of the measurement light on the eye fundus is changed while the scanning range of the measurement light is set to a predetermined scanning width by making the scanning angle of the measurement light scanned on the eye fundus constant. It is possible. That is, even when the scanning position of the measurement light is changed, the irradiation width of the measurement light on the fundus of the eye to be examined is not changed, and the irradiation range of the measurement light moves as a whole in the left-right direction.

  Here, when the mouse 76 is moved in the left direction, the control unit 70 determines that the scanning position of the measurement light after the start of the drag operation is in the right direction (when viewed from the apparatus side). When the galvano mirror 23 is moved so that it is moved to the right, and the mouse 76 is moved to the right, the scanning position of the measuring light after the start of the drag operation is more to the left than the scanning position of the measuring light before the start of the drag operation ( The galvanometer mirror 23 is moved so as to be moved when viewed from the apparatus side.

  Then, the driving position of the galvanometer mirror 23 when acquiring the tomographic image as described above is changed, and the tomographic image acquired after the scanning position of the measuring light on the eye fundus is changed is displayed on the display 75. As a result, a fundus tomographic image including the retina, pigment epithelium, choroid, etc. is displayed so as to move on the display 75 in the left-right direction. In this case, in the fundus region that is newly irradiated with the measurement light by the drag operation to the measurement light irradiation position before the drag operation and the measurement light irradiation target, the corresponding tomographic image is displayed in the tomographic image display region. In the fundus region displayed on 201R and removed from the measurement light irradiation target by the drag operation, the corresponding tomographic image is erased from the tomographic image display region 201R.

  The control unit 70 detects the amount of movement of the mouse 76 in the left-right direction from the drag start position on the basis of the operation signal output from the mouse 76, and designates in the left-right direction. The position movement information is acquired, and based on this, the scanning position of the galvanometer mirror 23 when acquiring the tomographic image is changed. The memory 72 stores a calculation table indicating the amount of deviation of the rotation center position of the galvanometer mirror 23 when a single tomographic image is acquired when the mouse 76 is moved by a predetermined amount from the drag start position. Then, the control unit 80 acquires the amount of deviation of the rotation center position of the galvanometer mirror 23 corresponding to the amount of lateral movement of the mouse 76 detected as described above from the calculation table.

  In the present embodiment, when the mouse 76 is moved to the left and right, dragging is started so that the displacement amount of the display position in the left and right direction of the cursor 100 is equal to the displacement amount of the display position in the left and right direction of the tomographic image 201. The correspondence between the amount of movement of the mouse 76 from the position in the left-right direction and the amount of deviation of the rotation center position is set. Therefore, the galvanometer mirror 23 is driven so that the tomographic image 201 is displayed on the display 75 so as to follow the cursor 100 moved by the drag operation on the mouse 76.

  In the above configuration, the control unit 70 acquires a tomographic image by changing the moving range of the galvanometer mirror 23 whenever the mouse 76 is moved, and updates the already displayed tomographic image to obtain a new one. If the tomographic image is displayed on the display 75, when the mouse 76 is dragged, the examiner can observe in real time the change in the acquisition site in the left-right direction of the tomographic image displayed on the screen. Therefore, adjustment to the imaging conditions desired by the examiner becomes easy.

  Further, the control unit 70 displays the line LS representing the measurement position (acquisition position) displayed electronically on the SLO image 301 when the measurement light scanning position on the eye fundus is changed as described above. The position is changed to correspond to the changed scanning position.

  According to the configuration described above, the examiner can adjust the desired fundus site to be displayed on the display 75 by performing a drag operation on the tomographic image 201 using the mouse 76. The fundus site desired by the examiner can be observed smoothly by a typical operation feeling.

    Further, according to the above configuration, the examiner changes the depth position of the subject eye corresponding to the optical path length of the reference light and the scanning position of the measurement light on the subject eye while viewing the tomographic image 201. Therefore, these two changing operations can be performed smoothly.

  In the present embodiment, the depth position of the eye to be examined corresponding to the optical path length of the reference light is changed by moving the mouse 76 back and forth, while the scanning position of the measurement light on the eye fundus is changed by moving the mouse 76 left and right. Control to change. Therefore, based on the operation signal output when the mouse 76 is moved in an oblique direction (because the movement of the mouse 76 in the front-rear direction and the movement of the mouse 76 in the left-right direction are detected simultaneously), the reference light By simultaneously changing the depth position of the eye to be examined corresponding to the optical path length and the scanning position of the measurement light on the fundus of the eye to be examined, the imaging positions in the depth direction and the left-right direction of the tomographic image are changed in parallel. It is also possible. In this case, the tomographic image 201 is displayed so as to move in an oblique direction on the display 75, and the position of the tomographic image displayed on the display 75 is confirmed while checking the position of the tomographic image in the depth direction and the horizontal direction. Therefore, the fundus site desired by the examiner can be observed smoothly. Conversely, when the mouse 76 is moved back and forth to change the shooting position in the depth direction and then the mouse 76 is moved to the left and right to change the shooting position in the left and right direction, the shooting position in the depth direction is changed. At this point, the tomographic image of the fundus site is not visible from the tomographic image display area 201R, and the positional relationship in the depth direction may not be grasped, and the effort to search for the desired fundus site may increase.

  In the above description, the tomographic image displayed on the display 75 is updated by moving the reference mirror 31 or moving the center of the swing angle of the galvano mirror 23 as needed in response to the drag operation of the mouse 76. However, the tomographic image 201 already displayed on the display 75 is moved following the movement of the cursor 100, and when an operation signal for which the clicked state is released is input, the drag start position is started. After the reference mirror 31 is moved according to the amount of movement of the mouse 76 in the front-rear direction (or left-right direction) (or after the center of the swing angle of the galvano mirror 23 is moved), a tomographic image is acquired and acquired. The obtained tomographic image may be displayed on the display 75.

In the above configuration, when the cursor 100 is placed on the tomographic image display area 201R and the wheel unit provided on the mouse 76 is further rotated, the control unit 70 changes the rotation direction and the rotation amount. Accordingly, the scanning drive mechanism 51 is used to move the irradiation position of the measurement light on the fundus in the Y direction so as to change the imaging position in the vertical direction (direction perpendicular to the tomographic plane) of the tomographic image. The angle of the galvanometer mirror 23 may be adjusted. For example, when the wheel unit is rotated forward, the control unit 80 operates the galvanometer mirror 23 so that the scanning position of the measurement light on the fundus moves upward according to the rotation amount. On the other hand, when the wheel unit is rotated backward, the control unit 80 operates the galvanometer mirror 23 so that the scanning position of the measurement light on the fundus moves downward according to the rotation amount. Also,
When the cursor 100 is placed on the tomographic image display area 201R and the wheel portion provided on the mouse 76 is rotated, the reference mirror 31 may be moved according to the rotation direction and the rotation amount. .

  In the above description, in the tomographic image displayed on the display 75, the vertical direction on the screen of the display 75 corresponds to the depth direction of the fundus and the horizontal direction corresponds to the scanning direction of the measurement light on the fundus. However, the present invention can be applied even in a display form in which the vertical direction on the screen of the display 75 corresponds to the scanning direction of the measurement light on the fundus and the horizontal direction corresponds to the depth direction of the fundus. Note that the above-described display form is particularly useful when the scanning direction of the measurement light on the eye fundus is the vertical direction. In this case, the control unit 70 measures the measurement light of the eye according to the vertical movement of the mouse 76. The depth position of the eye to be examined corresponding to the optical path length of the reference light may be changed according to the left / right movement of the mouse 76.

  When changing the scanning position of the measurement light in the left-right direction (vertical direction) on the eye to be examined as described above, each layer of the fundus is also curved due to the curved shape of the fundus of the eye to be examined. The display position of a predetermined fundus region (for example, retina, choroid, pigment epithelium, etc.) in the fundus image displayed in the display area of the image 201 is displayed on the OCT image 201 on the display 75 by changing the imaging position in the horizontal direction. As a result, the imaging sensitivity at the fundus site desired by the examiner may change.

  Therefore, the change in the imaging position in the depth direction of the predetermined eye part in the tomographic image acquired after changing the scanning position of the measurement light on the eye to be examined as described above, based on the detection result, The optical path difference between the reference light and the measurement light may be changed so that the deviation of the imaging position in the depth direction of the predetermined eye part to be measured with respect to the predetermined reference position set before the change of the scanning position is corrected. Good.

  More specifically, in the case where the scanning position of the measurement light on the eye to be examined is changed in the left-right direction based on the left-right movement of the mouse as described above, the control unit 70 performs a predetermined process in the acquired tomographic image. A change in imaging position in the depth direction of the fundus region (for example, a retinal pigment epithelium having a high reflectance) is detected so that a predetermined fundus region in the tomographic image display area 201R is displayed with substantially the same imaging sensitivity. The movement of the reference mirror 31 may be controlled based on the detection result.

  In this case, in the tomographic image acquired by the OCT optical system 200, a pigment epithelium part having a relatively high reflectance is extracted by image processing, and the imaging position (depth direction) on the captured image of the extracted pigment epithelium part is determined. Monitor.

  Here, the control unit 70 first detects the extraction position of the pigment epithelium part at the stage before the change of the scanning position of the measurement light and sets it as the reference position, and then changes the scanning position of the measurement light. By detecting the extraction position of the pigment epithelium part in the stage, the shift amount in the depth direction of the imaging position of the pigment epithelium part with respect to a predetermined reference position is obtained. Then, the control unit 70 moves the reference mirror 31 in the direction in which the deviation of the photographing position is corrected, and stops the movement of the reference mirror 31 when the deviation amount becomes almost zero. In this way, the reference mirror 31 is corrected so that the shift of the pigment epithelium portion with respect to the predetermined reference position set before the change of the imaging position on the tomographic image is corrected in conjunction with the change of the scanning position of the measurement light in the left-right direction. By moving the, the fundus site observed by the eye to be examined can be observed with a constant imaging sensitivity.

  Next, a method for changing the imaging position of the tomographic image by performing a click operation on the tomographic image 201 with the mouse 76 will be described. More specifically, as shown in FIG. 6A, the control unit 70 clicks the mouse 76 with the cursor 100 placed on the tomographic image display area 201R, and the mouse 76 is not moved. When the clicked state is released (the above operation is clicked in the following description), a predetermined area on the tomographic image at the position indicated by the cursor 100 as shown in FIG. The depth position of the eye to be examined or the fundus of the eye to be examined corresponding to the optical path length of the reference light so that (for example, a predetermined point) is displayed at a predetermined reference position (see K in FIG. 6) in the tomographic image display area 201R. The scanning position of the upper measurement light is changed. Note that K in FIG. 6 is for explaining the embodiment, and is not actually displayed.

  In this case, the control unit 70 is designated by the cursor 100 based on an operation signal output from the mouse 76 when a detection signal from a mouse button provided on the mouse 76 is output, and in the vertical and horizontal directions. Get the movement information of the specified position.

  In the memory 72, the coordinate position (X, Y) of the tomographic image display area 201R on the display 75 is stored in a predetermined step, and the control unit 70 is a cursor moved on the tomographic image display area 201R. The display position in 100 tomographic image display areas 201R can be detected. Further, in the memory 72, the coordinate position of a predetermined display position (for example, the center position in the tomographic image display area 201R, the upper side, the lower side, etc.) in the tomographic image display area 201R where the clicked tomographic image area is to be displayed. It is stored as a reference position. In this case, the control unit 70 may electronically display the reticle at a display position corresponding to the above-described reference position.

  Here, when the control unit 70 performs a click operation on the tomographic image 201 on the display 75, the control unit 70 performs the tomographic image of the cursor 100 when the click operation is performed based on the operation signal. The coordinate position in the display area 201R is detected, and movement information of the designated position in the vertical direction and the horizontal direction is acquired. Then, the amount of vertical displacement and the horizontal displacement between the coordinate position of the predetermined reference position and the coordinate position of the cursor 100 for displaying the tomographic image area designated based on the acquired movement information of the designated position. Detect the amount.

  Then, the control unit 70 moves the drive mechanism 50 so that the tomographic image region designated by the cursor 100 is at a predetermined vertical position on the display 75 based on the amount of deviation in the vertical direction obtained as described above. The optical path length of the reference light is changed by moving the reference mirror 31.

  In this case, the control unit 70 moves the reference mirror 31 in a direction in which the optical path length of the reference light is shortened when an area above the predetermined reference position is designated by the cursor 100, and the tomographic image at the predetermined fundus region. When the cursor 100 designates a region below the predetermined reference position, the reference mirror 31 is moved in the direction in which the reference light becomes longer, and the tomographic image at the predetermined fundus site is moved. Move the display position upward.

  Note that the memory 72 stores a calculation table indicating the amount of movement of the reference mirror 31 when the amount of deviation in the vertical direction with respect to a predetermined reference position is the predetermined amount of deviation. The amount of movement of the reference mirror 31 is obtained by obtaining from the calculation table the amount of movement of the reference mirror 31 corresponding to the amount of vertical displacement detected as described above. In this case, the vertical displacement of the display position in the vertical direction of the cursor 100 with respect to the predetermined reference position on the display 75 and the displacement amount of the display position in the vertical direction of the tomographic image 201 are equal to each other. A correspondence relationship between the amount of deviation in the direction and the amount of movement of the reference mirror 31 is set. Therefore, the reference mirror 31 is moved so that a predetermined tomographic image region designated by a click operation on the mouse 76 is displayed at a predetermined vertical position on the display 75.

  In the above configuration, for example, the examiner can set the predetermined reference position on the display 75 near the upper limit of the tomographic image display region R displayed on the display 75 with high imaging sensitivity. Is used to move the display position of the tomographic image 201 so that a desired fundus region (eg, retina, choroid, etc.) is displayed on the display 75 with high imaging sensitivity. Therefore, the fundus site desired by the examiner can be observed smoothly. Thereby, the examiner can arbitrarily select a fundus region displayed in a state where the imaging sensitivity is high. In the above description, it is assumed that the display position of the tomographic image moves up and down in accordance with the change in the depth position of the eye to be examined corresponding to the optical path length of the reference light. As long as the depth position of the eye to be examined corresponding to the optical path length of the reference light is changed, various modifications are possible.

  Further, the control unit 70 scans the driving mechanism 52 so that the tomographic image area designated by the cursor 100 comes to a predetermined left and right position on the display 75 based on the deviation amount in the left and right direction obtained as described above. The scanning position (irradiation position) of the measurement light on the eye fundus when the tomographic image is acquired is changed by changing the amount of deviation of the rotation center position of the galvanometer mirror 23 using.

  In this case, when the region located on the left with respect to the predetermined reference position is designated by the cursor 100, the control unit 70 sets the scanning position of the measurement light after the click operation to the left of the scanning position of the measurement light before the click operation. When the galvano mirror 23 is moved so as to be moved in the direction (when viewed from the apparatus side) and a region on the right side with respect to a predetermined reference position is designated by the cursor 100, scanning of the measurement light before the click operation is performed. The galvanometer mirror 23 is moved so that the scanning position of the measurement light after the click operation is moved in the right direction (when viewed from the apparatus side) rather than the position.

  The memory 72 stores a calculation table indicating change information of the scanning position (driving position) of the galvano mirror 23 when the amount of deviation in the left-right direction with respect to the predetermined reference position is the predetermined amount of deviation. The control unit 80 acquires, from the calculation table, the change information of the scanning position of the galvanometer mirror 23 corresponding to the lateral displacement amount detected as described above. In this case, the horizontal displacement of the display position of the cursor 100 with respect to the predetermined reference position on the display 75 and the displacement of the display position in the horizontal direction of the tomographic image 201 are equal to each other. Correspondence between the displacement amount in the direction and the change information of the scanning position of the galvanometer mirror 23 is set. Accordingly, the reference mirror 31 is moved so that a predetermined tomographic image area designated by a click operation on the mouse 76 is displayed at a predetermined left and right position on the display 75.

  In the above configuration, the control unit 70 acquires the tomographic image by moving the reference mirror 31 or changing the scanning position of the galvano mirror 23 in response to the click operation of the mouse 76 on the tomographic image 201, and the already displayed tomographic image. The tomographic image newly acquired by updating the image is displayed on the display 75.

  Further, the control unit 70 displays the line LS representing the measurement position (acquisition position) displayed electronically on the SLO image 301 when the measurement light scanning position on the eye fundus is changed as described above. The position is changed so as to correspond to the changed scanning position.

  According to the configuration as described above, the examiner performs a click operation on the tomographic image 201 using the mouse 76, and thereby changes the display position of the tomographic image 201 so that the desired fundus region is displayed on the display 75. Since it can be moved in the direction, the fundus site desired by the examiner can be observed smoothly.

  In the present embodiment, the control unit 70 determines the optical path of the reference light according to the display position in the vertical direction of the cursor 100 with respect to a predetermined reference position on the display 75 when the tomographic image 201 is clicked. Control for changing the scanning position of the measurement light on the fundus of the eye to be examined according to the display position in the left-right direction of the cursor 100 with respect to a predetermined reference position on the display 75 while changing the depth position of the eye to be examined corresponding to the length. It is carried out.

  In this case, it corresponds to the optical path length of the reference light based on the designated position information output when the click operation is performed in a state where the cursor 100 is placed obliquely with respect to the predetermined reference position on the display 75. By simultaneously changing the depth position of the eye to be examined and changing the scanning position of the measurement light on the eye fundus, it is also possible to change the imaging position in the depth direction and the left-right direction of the tomographic image in parallel. .

  In this case, since the tomographic image 201 is displayed so as to move in an oblique direction on the display 75, the position of the tomographic image displayed on the display 75 is confirmed while the depth direction and the left-right direction of the tomographic image are displayed. Since the imaging position can be changed, the fundus site desired by the examiner can be observed smoothly.

  In addition to the mode for simultaneously changing the shooting position in the depth direction and the left-right direction as described above, based on the display position in the vertical direction of the cursor 100 when a click operation is performed on the tomographic image 201. Measurement on the fundus of the eye to be examined based on the mode for changing the depth position of the eye to be examined corresponding to the optical path length of the reference light and the display position in the left-right direction of the cursor 100 when the click operation is performed on the tomographic image 201 A mode for changing the scanning position of the light in the left-right direction may be provided.

  In the above description, the mouse 76 is used to change the depth position of the subject eye corresponding to the optical path length of the reference light or the scanning position of the measurement light on the subject eye fundus. The configuration is not limited to this as long as an arbitrary position on the displayed tomographic image can be designated. In this case, the touch panel function is mounted on the display, and based on the specified position information on the display when the tomographic image on the touch panel is touched or the movement information of the specified position when the drag operation is performed on the tomographic image on the touch panel. The depth position of the eye to be examined or the scanning position of the measurement light on the eye fundus corresponding to the optical path length of the reference light may be changed.

  In the above description, the reference light is reflected by arranging the reference mirror 31 in the reference light optical path. However, the reference light is allowed to pass through the optical path formed by the optical fiber without using the reference mirror. As a result, the reference light and the measurement light reflected from the fundus may interfere with each other (see Japanese Patent Application Laid-Open No. 2007-151622). In this case, for example, the optical path length of the reference light can be changed by moving the emission end of the optical fiber arranged in the reference light optical path.

  In the above description, the optical path length between the reference light and the measurement light is changed by changing the optical path length of the reference light, but the optical path length of the measurement light is changed. It is good also as a structure. In this case, for example, the optical path length of the measurement light may be changed by integrally moving the collimator lens 25 and the end 39b of the optical fiber 38b in the optical axis direction.

It is a figure which shows the optical system and control system of the ophthalmologic imaging device of this embodiment. It is a figure explaining the operation | movement at the time of acquiring sequentially the OCT image by B scan, and the SLO image by two-dimensional scan. It is an example of the display screen displayed on a display. It is a figure explaining the change of a display image when the drag operation to the up-down direction is made with respect to the tomographic image on a display. It is a figure explaining the change of a display image when the drag operation to the left-right direction is made | formed with respect to the tomographic image on a display. It is a figure explaining the change of a display image when clicking operation is performed with respect to the tomographic image on a display.

Explanation of symbols

23 Scanning section (galvanomirror)
27 OCT light source 31 Reference mirror 70 Control unit 75 Display 76 Mouse 100 Cursor 200 OCT optical system 201 Tomographic image 201R Tomographic image display area

Claims (3)

  1. The light emitted from the measurement light source is divided into reference light and measurement light, and irradiation means for irradiating the measurement light toward the eye to be examined, and scanning for scanning the measurement light emitted to the eye to be examined by the irradiation means And an optical path difference changing means for changing an optical path difference between the optical path length of the reference light and the optical path length of the measurement light applied to the eye to be examined, and a combination of the reference light and the reflected light of the measurement light. In an ophthalmologic photographing apparatus comprising: an interference optical system that continuously obtains tomographic images of an eye to be examined by receiving the interference light generated; and display means that displays the tomographic images acquired by the interference optical system as moving images ,
    The display means includes a card for designating an arbitrary position on the display screen of the display means.
    -Sol appears,
    A pointing device for moving the cursor on the display screen of the display means;
    Control means capable of setting a plurality of shooting conditions based on the position of the cursor on the display screen of the display means and an operation signal from the pointing device ;
    The control means is based on an operation signal output from the pointing device when the cursor is placed on a tomographic image display area set on the display screen as an area for displaying a moving image of the tomographic image. change the optical path difference by the optical path difference changing means Te, ophthalmologic photographing apparatus according to claim a moving image of a tomographic image acquired after the optical path difference is changed to be displayed on the display means.
  2. The ophthalmologic photographing apparatus according to claim 1.
    The position specifying means comprises a pointing device for moving the cursor on the display screen of the display means,
    The pointing device further includes a pressing detection means for detecting that the pointing device is pressed by the examiner's hand,
    The control means outputs a detection signal from the press detection means in a state where the cursor is placed in a display area of the tomographic image on the display screen of the display means, and the detection signal is output. The movement information of the designated position is acquired based on the operation signal output from the pointing device as it is,
    Based on the movement information of the designated position in the vertical direction of the position designation means, one of the optical path difference changing means or the scanning means is controlled, and based on the movement information of the designated position in the left-right direction of the position designation means. And an optical path difference changing unit or the scanning unit is controlled.
  3. The ophthalmologic photographing apparatus according to claim 1.
    When the cursor is placed on a front image display region set as a region for displaying a fundus front image, the control unit controls the eye to be inspected by the scanning unit based on an operation signal output from the pointing device. Changing the scanning position of the measurement light in the above, and displaying the tomographic image acquired after the scanning position is changed as a moving image on the display means,
    A change in imaging position in the depth direction of a predetermined eye part in a tomographic image acquired after the scanning position is changed is detected, and based on the detection result, a predetermined value set before the change of the scanning position is detected. An ophthalmologic photographing apparatus characterized by controlling the optical path difference changing means so as to correct a deviation of a photographing position in a depth direction of the predetermined eye part to be examined with respect to a reference position.
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