JP2013248517A - Ophthalmic imaging apparatus and ophthalmic imaging method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve precise focus adjustment even if aberration exists in an eye to be examined.SOLUTION: An ophthalmic imaging apparatus adjusts a positional relation of a plurality of focus marker images based on respective focus markers projected from a focus marker-projecting unit provided on an illumination optical system onto an eye to be examined. After the adjustment of the positional relation, the ophthalmic imaging apparatus controls a moving unit that moves a focusing unit along an optical axis of an imaging optical system, so that a focus correction for aberration of the eye to be examined is made.

Description

  The present invention relates to an ophthalmologic photographing apparatus and an ophthalmologic photographing method used for photographing the fundus of a subject's eye in an ophthalmic clinic or the like.

  In order to easily focus on the fundus of the eye to be examined, a focus split index divided on the pupil of the eye to be examined is projected, the index image is observed through the focus lens of the observation imaging system, and the focus split index image It is known to focus by observing the positional relationship. Then, both are moved in the direction of the optical axis in conjunction with each other, and the focus split index image on the fundus of the eye to be examined is observed. A fundus camera that can focus on the subject is known. Furthermore, an apparatus that captures a focus split image, detects the position of the focus split image, and performs autofocus is also known.

  Japanese Patent Application Laid-Open No. 2004-228867 also captures a projected focus split image and performs autofocus from the positional relationship of the focus split image. Disclosed is a fundus camera that captures a focus split index image divided into two projected onto the fundus, detects the focus state from each position of the two focus split index images, and dims the brightness of the index at that time Has been.

Patent Document 2 discloses an ophthalmologic apparatus that detects a focus state by projecting a focus index onto the fundus and capturing an index image with a photographing optical system.
Japanese Patent Laid-Open No. 5-95907 Japanese Patent Laid-Open No. 8-27592

  However, in order to remove reflected light from the cornea of the eye to be examined, the conventional fundus camera divides the region of the fundus illumination light beam, the focus split indicator light beam, and the observation photographing light beam in the vicinity of the eye to be examined. For this reason, when there is an individual difference in the aberration of the eye optical system to be examined, if the image is taken only by setting the focus split index image position to a predetermined positional relationship, an error occurs in focusing depending on the eye to be examined, and the focus is shifted. Possible fundus image.

  An object of the present invention is to solve the above-mentioned problems and to perform accurate focusing even when there is aberration in the eye to be examined.

An ophthalmologic photographing apparatus according to the present invention
A focus index projection means provided in the illumination optical system, for projecting a plurality of focus indices on the eye to be examined;
Moving means for moving the focusing means along the optical axis of the photographing optical system;
Control means for controlling the moving means so as to perform focus correction in accordance with the aberration of the eye to be examined after adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices.

In addition, the ophthalmologic photographing method according to the present invention includes:
Adjusting the positional relationship of a plurality of focus index images based on a plurality of focus indices projected from the focus index projection means provided in the illumination optical system onto the eye;
And a step of controlling a moving unit that moves the focusing unit along the optical axis of the imaging optical system so as to perform focus correction that matches the aberration of the eye to be examined after the positional relationship is adjusted.

  According to the present invention, even when there is an aberration inherent in the eye to be inspected, autofocus with higher accuracy than that of a conventional fundus camera can be performed by using both detection by the split optical element and phase difference detection.

1 is a configuration diagram of a fundus camera of Example 1. FIG. It is the side view and front view of a focus parameter | index projection means. It is a block diagram of a phase difference detection means. It is explanatory drawing of the position of the focus parameter | index light beam on a to-be-tested eye pupil. It is function explanatory drawing of a focus parameter | index. It is explanatory drawing of the to-be-tested eye E and the focus parameter | index light beam and observation imaging light beam of the objective lens vicinity. It is explanatory drawing of spherical aberration. FIG. 5 is an explanatory diagram of a focus index light beam and an observation photographing light beam in a subject eye having spherical aberration. FIG. 6 is an explanatory diagram of a focus index image on the fundus and an image obtained by projecting a one-dimensional sensor onto the fundus. It is explanatory drawing of the relationship between a phase difference detection means and a fundus conjugate surface. It is explanatory drawing of the output signal of a one-dimensional sensor. It is a block diagram of a focus lens unit.

  The present invention will be described in detail based on the embodiments shown in the drawings.

  FIG. 1 is a configuration diagram of a fundus camera that is an example of an ophthalmologic photographing apparatus according to the present embodiment. On an optical axis O1, an observation light source 1 that emits steady light such as a halogen lamp, a condenser lens 2, and an infrared ray A filter 3 that transmits light and blocks visible light, an imaging light source 4 such as a strobe, a lens 5, and a mirror 6 are arranged. On the optical axis O2 in the reflection direction of the mirror 6, a ring diaphragm 7 having a ring-shaped opening, a focus index projection means 8, a relay lens 9, and a perforated mirror 11 having a photographing diaphragm 10 disposed in the central opening are sequentially arranged. Has been. The optical axis O1 and the optical axis O2 constitute an illumination optical system that illuminates the eye to be examined.

  An objective lens 12 is disposed on the optical axis O3 in the reflection direction of the perforated mirror 11 so as to face the eye E to be examined. Behind the opening at the center of the perforated mirror 11, there are a focus lens 13, a photographing lens 14, flip-up mirrors 15 and 16, which are examples of reflecting means that can be inserted into and removed from the optical path, and an image sensor 17 for still images. The fundus photographing optical system is configured in sequence.

  On the optical axis O4 in the reflection direction of the flip-up mirror 15, a mirror 18 that reflects infrared light and transmits visible light is disposed. On the optical axis O5 in the reflection direction of the mirror 18, a field lens 19, a lens 20, and an observation image pickup device 21 are sequentially arranged to constitute a fundus observation optical system. The still image pickup device 17 and the observation image pickup device 21 are optically arranged at conjugate positions. Further, a phase difference detecting means 22 is arranged on the optical axis O6 of the reflected light path which is the reflection direction of the flip-up mirror 16.

  2A is a side view of the focus index projection unit 8, and FIG. 2B is a front view. As shown in FIG. 2, the focus index projection means 8 is provided with a focus split prism 23 having prism portions 23a, 23b and 23c, a focus index 24 having a rectangular opening 24a, and a focus index illumination LED 25. .

  The focus index projection means 8 and the focus lens 13 are connected by a focus link mechanism 26, and move in conjunction with the directions of the optical axes O2 and O3. The focus link mechanism 26 optically conjugates the focus index 24 of the focus index projection unit 8 with the still image pickup device 17 and the observation image pickup device 21.

  Further, in the phase difference detecting means 22, as shown in FIG. 3, the optical axis of the optical axis O6 behind (following) the conjugate plane A optically conjugate with the still image pickup device 17 and the observation image pickup device 21. A pair of lenses 27a and 27b and one-dimensional sensors 28a and 28b are respectively disposed outside. The one-dimensional sensors 28a and 28b are provided at positions optically conjugate with the conjugate plane A via the lenses 27a and 27b, and are examples of information indicating the phase of the target image on the one-dimensional sensors 28a and 28b. The distance is obtained by detecting a phase difference, that is, a deviation. The still image pickup element 17 and the observation image pickup element 21 are also called first image pickup means, and at least one of the plurality of one-dimensional sensors is also called second image pickup means.

  The output of the still image pickup device 17 is connected to the control unit 32 via the image processing unit 31, and the output of the observation image pickup device 21 is directly connected to the control unit 32. The outputs of the one-dimensional sensors 28a and 28b are connected to the control unit 32 via phase difference calculation means 33 for acquiring information indicating the phase of at least one of the plurality of focus indexes.

  An output of the control unit 32 is connected to the observation light source 1 via an observation light source control unit 34 that controls light amount adjustment / lighting / extinguishing, and the like, and a photographing light source control unit 35 that controls light amount adjustment / lighting / extinction. To the imaging light source 4. Further, an image memory 36, a photographing switch 37, and a monitor 38 are connected to the control unit 32.

  Devices other than the monitor 38 and the photographing switch 37 are mounted on an optical base (not shown) to constitute an optical unit of a fundus camera, and the optical unit is further placed on a stage unit.

During fundus photography, the control unit 32 controls the observation light source control unit 34 to turn on the observation light source 1. The light beam emitted from the observation light source 1 is condensed by the condenser lens 2, the visible light is cut by the filter 3, only the infrared light is transmitted and transmitted through the photographing light source 4, the lens 5, the mirror 6, and the ring diaphragm. 7 is used as a ring beam. Further, it passes through the focus index projection means 8 and the relay lens 9 and is deflected in the direction of the optical axis O3 by the perforated mirror 11, and illuminates the fundus Er of the eye E through the objective lens 12. The light beam reaching the fundus Er is reflected and scattered and emitted from the eye E as a fundus reflection image. The fundus reflection image passes through the objective lens 12, the photographing aperture 10, the focus lens 13, and the photographing lens 14, and is then deflected by the flip-up mirror 15 and the mirror 18, and is observed through the field lens 19 and the lens 20. 21 is imaged.
The control unit 32 displays the fundus image captured by the observation image capturing element 21 on the monitor 38.

  The examiner performs fine adjustment of the alignment between the eye E and the optical unit while observing the fundus image displayed on the monitor 38, and then performs focus adjustment, which will be described later, and presses the photographing switch 37 to perform photographing.

  In FIG. 2, the light flux from the focus index illumination LED 25 is deflected in the direction of the optical axis O2 by the prism portion 23a of the focus split prism 23 and reaches the prism portions 23b and 23c. Here, the prism portions 23b and 23c function as split optical elements having prism surfaces with contrasting angles. The light beams reaching the prism portions 23b and 23c pass through the rectangular opening 24a of the focus index 24 shown in FIG. 2, and become two focus index light beams Lb and Lc symmetrical to the optical axis O2, respectively. It reaches the eye E through the perforated mirror 11 and the objective lens 12.

  FIG. 4 shows a position Lp1 where the focus index light beam Lb passes over the pupil Ep of the eye E and a position Lp2 of the focus index light beam Lc on the pupil Ep of the eye E.

  5A to 5C show the relationship between the focus index light beams Lb and Lc reaching the fundus Er of the eye E and the focus index images Fb and Fc on the fundus Er by the plurality of focus index light beams Lb and Lc. Is shown.

  FIG. 5A shows a case where the fundus Er of the eye E and the focus index 24 are in an optically conjugate positional relationship. Since the fundus oculi Er and the focus index 24 are optically conjugate, the focus index light beams Lb and Lc separated into two become index images Fb and Fc of the rectangular openings 24a of the focus index 24 on the fundus Er and substantially in a line. Lined up.

  FIG. 5B shows a case in which the eye E is more myopic than that in FIG. At this time, since the fundus Er and the focus index 24 are not optically conjugate, the focus index light beams Lb and Lc separated into two become the focus index images Fb and Fc on the fundus Er, and the index image Fb is upward. The index image Fc is shifted downward.

  FIG. 5C shows a case where the eye E is far-sighted than FIG. Since the fundus Er and the focus index 24 are not optically conjugate, the focus index light beams Lb and Lc separated into two become the focus index images Fb and Fc on the fundus Er, and the index image Fb is below the index image Fc. Shifts upward.

  The examiner observes the focus index images Fb and Fc displayed on the monitor 38 and manually operates a focus knob (not shown) to adjust the positional relationship between the focus index images Fb and Fc so as to satisfy a predetermined condition. To do. In other words, the fundus Er and the focus index 24 can be optically conjugate by adjusting so that the focus index images Fb and Fc are arranged in a substantially line. With the focus link mechanism 26, the focus index 24 of the focus index projection unit 8, the imaging surface of the still image pickup device 17, and the fundus Er are in an optically conjugate relationship, and the fundus Er can be focused.

  However, when the eye E has spherical aberration, astigmatism, and the like, and the optical aberration is large, even if the focus index images Fb and Fc are arranged in a substantially line, the best focus may not be achieved on the fundus Er.

  FIG. 6 shows focus index light beams Lb and Lc and an observation photographing light beam L near the eye E and the objective lens 12. On the pupil Ep of the eye E, the focus index light beams Lb and Lc pass through positions away from the optical axis O3, and the observation photographing light beam L limited by the objective lens 12 is on the pupil Ep along the optical axis O3. It passes through the center. When the optical aberration of the eye E is small, the depth of focus of the fundus camera is deep. Therefore, if the focus index images Fb and Fc are arranged in a substantially line, the fundus Er can be focused.

  FIG. 7 is an explanatory diagram of spherical aberration. Light rays L1, L2, and L3 having different heights from the optical axis O and incident on the focal plane B of the lens 41 are incident on the lens 41 from the right side of the drawing. . When the lens 41 has spherical aberration, the light ray L3 having the lowest height from the optical axis O passes through a position on the focal plane B substantially close to the optical axis O, but the light rays L1 and L2 are separated from the optical axis O. Pass through the position.

  In the case of the eye E having large aberrations, the focus index light beams Lb and Lc and the observation photographing light beam L pass through different areas on the pupil Ep on the pupil Ep of the eye E. Therefore, even if the focus index images Fb and Fc are arranged in a line, the focus is not always focused on the fundus Er due to the influence of aberration.

  FIG. 8 shows the eye E to be examined having a large spherical aberration, the focus index light beams Lb and Lc near the objective lens 12, and the observation photographing light beam L. Since the spherical aberration of the eye E is large, the focus index images Fb and Fc are not best focused even if they are arranged in a line, so that the focus index image Fb is often located below and the focus index image Fc is often located above. Then, the fundus Er is in focus.

  Thus, there are individual differences in aberrations such as spherical aberration and astigmatism in the human eye. Therefore, in the case of the eye E to be examined with large aberrations, focus correction that matches the aberration is required.

  FIGS. 9A to 9C show focus index images Fb and Fc projected onto the fundus Er and sensor images Sab, Sa and Sc obtained by projecting the one-dimensional sensors 28a and 28b onto the fundus Er.

  The examiner observes the image displayed on the monitor 38 and manually operates the focus knob to arrange the focus index images Fb and Fc in a line. If there is little optical aberration in the eye E, the fundus Er, the still image pickup device 17 and the conjugate plane A of the phase difference detection means 22 shown in FIG. 10 are optically conjugate, as shown in FIG. In addition, the two images on the fundus oculi Er by the one-dimensional sensors 28a and 28b overlap to form a sensor image Sab.

  If there is aberration in the eye E, the two sensor images Sa and Sb on the fundus Er are shifted up and down by the one-dimensional sensors 28a and 28b. As shown in FIG. 10, when there is a conjugate plane of the fundus Er in front of the vicinity of the conjugate plane A, the sensor image Sa is shifted downward and the sensor image Sb is shifted upward as shown in FIG. 9B. On the contrary, when the conjugate surface of the fundus Er is in the back of the conjugate surface A, the sensor image Sa is shifted upward and the sensor image Sb is shifted downward as shown in FIG.

  FIGS. 11A to 11C show signals to be output to the control unit 32 of the one-dimensional sensors 28a and 28b in the case of FIGS. 9A to 9C. When there is little optical aberration in the eye E, when the focus index images Fb and Fc are arranged in a line, as shown in FIG. 11A, the output signals Oa, Ob is the same signal.

  When the eye E has an aberration and the conjugate surface of the fundus Er is in front of the conjugate surface A, when the focus index images Fb and Fc are arranged in a line, as shown in FIG. The outputs Oa and Ob of the original sensors 28a and 28b have different phases. That is, the phase of the output signal Oa is delayed, and the phase of the output signal Ob is advanced. Further, when there is a conjugate surface of the fundus Er in the vicinity of the conjugate surface A, when the focus index images Fb and Fc are arranged in a line, as shown in FIG. 11C, the one-dimensional sensors 28a and 28b The outputs are in different phases. That is, the phase of the output signal Oa is advanced, and the phase of the output signal Ob is delayed. These output signals Oa and Ob are input to the phase difference calculating means 33, and the phase difference is calculated to obtain the amount of focus deviation.

  Up to this point, the general procedure by the fundus camera and the functions of the focus index projection unit 8 and the phase difference detection unit 22 are used, and these functions are used in combination to correct the focus according to individual differences such as human eye aberrations. Explained that is required. That is, fine adjustment of the alignment between the eye E and the optical unit is performed, and then the focus knob is operated so that the focus index images Fb and Fc projected on the monitor 38 are arranged in a line, and the first focus adjustment is performed. Is going. However, as described above, when there is aberration in the eye E, focus adjustment to the fundus Er may not always be the best focus, but in this embodiment, focus correction that matches individual differences such as human eye aberration is performed. It is possible.

  When the examiner presses the photographing switch 37 after the completion of the first focus adjustment, the control unit 32 flips the flip-up mirror 15 to the dotted line position in FIG. Next, the second focus adjustment is performed by moving the focus lens 13 in the optical axis direction so that the phase difference calculated using the phase difference calculation means 33 is within the allowable range.

  Here, the control unit 32 controls the focus link driving means of the focus link mechanism 26, and when the phase difference calculated by the phase difference calculating means 33 by the second focus adjustment falls within the allowable value, the flip-up mirror 16 is moved. Jump up to the dotted line position in FIG. That is, after controlling the focus link driving means in a state where the flip-up mirror 16 is in the optical path of the photographing optical system, the flip-up mirror 16 is removed from the optical path of the photographing optical system. Subsequently, the imaging light source 4 emits light via the imaging light source control unit 35, and the image processing unit 31, which is an example of a still image acquisition unit, acquires a still image by imaging with the imaging device 17 for still images. The image processing unit 31 appropriately performs image processing on the still image, records the image in the image memory 36, and displays the captured still image on the monitor 38.

  As described above, the fundus camera which is an example of the ophthalmologic photographing apparatus according to the present embodiment includes the focus index projection unit 8 and the phase difference detection unit 22, so that the focus index projection unit and the fundus photographing optical due to the aberration of the eye E are examined. An error in focusing with the system can be detected and adjusted.

  Further, in this embodiment, when the focus index illumination LED 25 is a light source that emits near-infrared light, the focus index light flux and the photographic illumination light flux that is visible light emitted from the photographic light source 4 have different wavelengths. The portions that are reflected and scattered in the fundus Er of the eye E to be examined are different. Therefore, the control unit 32 does not perform control so that the phase difference calculated by the phase difference calculation unit 33 is minimized, but corrects the difference between the reflected and scattered portions of the visible light and near infrared light of the fundus Er. The focus link driving means is controlled so that the phase difference becomes a predetermined phase difference.

  Further, the control unit 32 is configured to blink the focus index illumination light source when the lens drive by the phase difference detection unit is completed, and to notify the examiner of the completion of the autofocus operation.

  In addition to the first embodiment, the second embodiment includes a focus correction switch and a focus lens moving unit. By having the focus correction switch, when the focus correction switch is pressed, the control unit 32 controls the output of the phase difference calculation means 33 to drive the focus lens moving means so that the phase difference is minimized. The focus correction switch may be shared with the shooting switch 37.

  FIG. 12 shows the focus lens unit 51. The focus lens 13 is fixed by a focus lens moving unit 52 including a motor, a gear, and the like. The focus lens moving unit 52 can move in the direction of the optical axis O3 by a control signal from the control unit 32 independently of the focus link mechanism 26.

  The amount of movement of the focus lens 13 on the optical axis O3 is smaller than the amount of movement by the focus lens moving means 52 and the amount of movement by the focus link mechanism 26. By doing so, the mechanism of the focus lens moving means 52 can be miniaturized, and the entire fundus camera can be miniaturized. In addition, the operator can perform focusing with the same operation feeling as that of a conventional fundus camera, and the positional relationship between the focus index images Fb and Fc observed by the operator does not change. That is, even if correction is performed by detecting the phase difference, the positional relationship of the focus index image observed by the operator does not change, so that no uncomfortable feeling is caused.

  When the focus correction switch is pressed, the control unit 32 controls the focus lens moving unit 52 so that the phase difference is minimized, and when the phase difference calculated by the phase difference calculating unit 33 falls within the allowable value, the control unit 32 An electronic sound informs you that focus correction has been completed. When the focus correction is completed, the examiner presses the photographing switch 37 to photograph the fundus Er.

  As described above, since the focus correction switch is provided, it is possible to operate the focus correction when necessary, so that correction unintended by the operator can be prevented and energy consumption can be suppressed.

  Furthermore, in this embodiment, the monitor 38 is provided with warning means for displaying a warning and a warning sound such as a buzzer. When the focus correction switch is pressed, the control unit 32 drives the focus lens moving unit 52 and controls the buzzer sound or the focus index image when the phase difference calculated by the phase difference calculating unit 33 does not fall within a predetermined amount. A warning is issued by warning means such as blinking of Fb and Fc. Accordingly, it is possible to notify the operator that it is difficult to detect the phase difference between the focus index images Fb and Fc, and to prompt the operator to perform shooting with manual focus. That is, if it is difficult to detect the phase difference of the focus index image and the operator is notified by the warning means, shooting with manual focus can be facilitated.

  In the above description, preferred embodiments 1 and 2 have been described. However, it goes without saying that the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.

DESCRIPTION OF SYMBOLS 1 Light source for observation 4 Light source for imaging | photography 8 Focus index projection means 13 Focus lens 15, 16 Bounce mirror 17 Imaging element for still images 21 Imaging element for observation images 22 Phase difference detection means 24 Focus index 26 Focus link mechanism 28a, 28b Primary Original sensor 32 Control unit 33 Phase difference calculation means 36 Image memory 37 Shooting switch 38 Monitor 51 Focus lens unit Fb, Fc Focus index image Lb, Lc Focus index luminous flux Oa, Ob Output signal

Claims (19)

A focus index projection means provided in the illumination optical system, for projecting a plurality of focus indices on the eye to be examined;
Moving means for moving the focusing means along the optical axis of the photographing optical system;
Control means for controlling the moving means so as to perform focus correction in accordance with the aberration of the eye to be examined after adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices;
An ophthalmologic photographing apparatus comprising: An acquisition means for acquiring information indicating a phase in at least one of the plurality of focus index images;
The ophthalmologic photographing apparatus according to claim 1, wherein the control unit performs the focus correction by controlling the moving unit based on information indicating the phase. A focus index projection means provided in the illumination optical system, for projecting a plurality of focus indices on the eye to be examined;
Moving means for moving the focusing means along the optical axis of the photographing optical system;
Obtaining means for obtaining information indicating a phase in at least one of the plurality of focus indicators;
Control means for controlling the moving means based on the information indicating the phase after adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices;
An ophthalmologic photographing apparatus comprising: Information that indicates the position of the conjugate plane in the optical axis direction is detected as information indicating the phase, which is provided after the conjugate plane that is optically conjugate with the imaging means provided in the imaging optical system. Detecting means for
The ophthalmologic photographing apparatus according to claim 3, wherein the control unit controls the moving unit based on the detected information. A detecting unit that is provided at a subsequent stage of the conjugate plane that is optically conjugate with the imaging unit provided in the photographing optical system and that detects information indicating the position of the conjugate plane in the optical axis direction; ,
The ophthalmologic photographing apparatus according to claim 1, wherein the control unit performs the focus correction by controlling the moving unit based on the detected information. A focus index projection means provided in the illumination optical system, for projecting a plurality of focus indices on the eye to be examined;
Moving means for moving the focusing means along the optical axis of the photographing optical system;
A detection unit that is provided at a subsequent stage of a conjugate plane that is optically conjugate to an imaging unit provided in the imaging optical system, and that detects information indicating the position of the conjugate plane in the optical axis direction;
Control means for controlling the moving means based on the detected information after adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices;
An ophthalmologic photographing apparatus comprising: It further has reflecting means provided so as to be detachable with respect to the optical path of the photographing optical system,
The detecting means is provided in a reflected light path of the reflecting means;
5. The control unit according to claim 4, wherein the control unit removes the reflection unit from the optical path of the imaging optical system after controlling the moving unit in a state where the reflection unit is in the optical path of the imaging optical system. The ophthalmologic photographing apparatus according to any one of 6. The detection means is
A plurality of lenses provided at a subsequent stage of the conjugate surface and disposed outside the optical axis of the photographing optical system;
A second imaging unit that images at least one focus index image of the plurality of focus index images as a plurality of sensor images via the plurality of lenses;
The ophthalmologic photographing apparatus according to claim 4, wherein the control unit controls the moving unit based on a signal from the second imaging unit. The second imaging means is composed of a plurality of one-dimensional sensors,
The ophthalmologic photographing apparatus according to claim 8, wherein the control unit controls the moving unit based on a plurality of signals from the plurality of one-dimensional sensors.   The ophthalmologic photographing apparatus according to claim 4, further comprising a warning unit that issues a warning when the detected information does not satisfy a predetermined condition.   The ophthalmologic imaging according to any one of claims 1 to 10, wherein the control unit adjusts a positional relationship between the plurality of focus index images so that the plurality of focus index images are arranged in a substantially line. apparatus.   12. The apparatus according to claim 1, further comprising a still image acquisition unit configured to capture the still image of the eye to be inspected by capturing the eye after the control unit controls the moving unit. The ophthalmologic photographing apparatus described in 1. Adjusting the positional relationship of a plurality of focus index images based on a plurality of focus indices projected from the focus index projection means provided in the illumination optical system onto the eye;
Controlling the moving means for moving the focusing means along the optical axis of the imaging optical system so as to perform focus correction suitable for the aberration of the eye to be examined after the positional relationship is adjusted;
An ophthalmologic photographing method characterized by comprising: Further comprising obtaining information indicating a phase in at least one of the plurality of focus index images.
14. The ophthalmologic imaging method according to claim 13, wherein in the controlling step, the focus correction is performed by controlling the moving unit based on information indicating the phase. Obtaining information indicating a phase in at least one of a plurality of focus indexes projected onto the eye to be examined from a focus index projection unit provided in the illumination optical system;
Controlling a moving means for moving the focus means along the optical axis of the imaging optical system based on the information indicating the phase after adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices; ,
An ophthalmologic photographing method characterized by comprising: Information indicating the position of the conjugate plane in the optical axis direction is obtained by the detection means provided at the subsequent stage of the conjugate plane that is optically conjugate with the imaging means provided in the imaging optical system. And further including a step of detecting as information to indicate,
The ophthalmologic imaging method according to claim 15, wherein in the controlling step, the moving unit is controlled based on the detected information. A step of detecting information indicating the position of the conjugate plane in the optical axis direction by detection means provided at a stage subsequent to the conjugate plane that is optically conjugate with the imaging unit provided in the imaging optical system; In addition,
14. The ophthalmologic imaging method according to claim 13, wherein in the controlling step, the focus correction is performed by controlling the moving unit based on the detected information. A step of detecting information indicating a position of the conjugate plane in the optical axis direction by a detection unit provided at a subsequent stage of the conjugate plane that is an optically conjugate position with respect to an imaging unit provided in the photographing optical system;
After adjusting the positional relationship of the plurality of focus index images based on the plurality of focus indices projected on the eye to be examined from the focus index projection means provided in the illumination optical system, the focus means is photographed based on the detected information Controlling the moving means moving along the optical axis of the optical system;
An ophthalmologic photographing method characterized by comprising: The detection means is provided in a reflection optical path of a reflection means provided to be removable with respect to the optical path of the photographing optical system;
17. The control step includes removing the reflecting means from the optical path of the photographing optical system after controlling the moving means in a state where the reflecting means is in the optical path of the photographing optical system. The ophthalmologic imaging method according to any one of items 1 to 18.

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