JPH1147093A - Ophthalmologic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic device with which a photographing unit is initialized at a prescribed position when the main body of the device reaches a moving limit through rough alignment. SOLUTION: When performing the rough alignment in the state of moving an optical system housing unit B3 of the photographing unit backward rather than the position after initialization to an eye to be examined before starting the alignment, an examining person operates a joy stick 102 to move a movable base B1 forwards. When a fore limit switch 312 detects the movable base B1 reaches the fore moving limit, the optical system housing unit B3 is moved forwards and positioned at the position after initialization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmological apparatus capable of automatic alignment used in ophthalmic clinics and optician stores.

[0002]

2. Description of the Related Art Conventionally, an ophthalmologic apparatus having a so-called automatic alignment function, that is, a cornea reflected light of an alignment index light projected on an eye to be examined is guided to an optical sensor by a light receiving optical system, and the output of the optical sensor is used as a basis. An ophthalmologic apparatus for automatically aligning an optometric unit with an eye to be examined is known.

In such an ophthalmologic apparatus, an examiner moves a measurement optical axis to a position near a vertex of a cornea of a subject's eye using a joystick while watching a viewfinder or a monitor (coarse alignment). When the rough alignment is completed, automatic alignment is started by the alignment drive unit based on the output of the optical sensor (fine alignment). Thereby, the optometry unit is moved to a predetermined position with respect to the subject's eye.

[0004]

However, in an ophthalmologic apparatus having an automatic alignment function as described above, if disturbance light or the like enters the optical sensor between the time the apparatus is turned on and the start of optometry. Even during rough alignment, the optometry unit may move in an unexpected direction by the alignment driving unit. Therefore, for example, when the right eye of the subject is to be examined in a state where the optometry unit has moved to the left with respect to the subject's eye, the apparatus body is moved to the area where automatic alignment is possible by coarse alignment. Therefore, there is a problem that the optometry cannot be performed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to return an optometric unit to a predetermined position when a movement limit of the apparatus main body is detected by coarse alignment. It is an object of the present invention to provide an ophthalmologic apparatus that can maintain the optometry unit in an area where automatic alignment can be performed by moving the optometry unit in such a manner.

In order to solve the above-mentioned problems, an ophthalmologic apparatus according to the present invention comprises an apparatus main body, an optometry unit provided in the apparatus main body for performing an optometry, and a first apparatus for aligning the apparatus main body with an eye to be examined. In an ophthalmologic apparatus comprising: an alignment unit; and a second alignment unit configured to perform alignment of the optometry unit with respect to an eye to be inspected, a detection unit configured to detect a movement limit of the apparatus main body, and And control means for controlling the operation of the second alignment means.

In the above apparatus, the present invention is characterized in that when the apparatus main body reaches a movement limit by the operation of the first alignment means, the operation of the second alignment means is controlled by the control means so that the optometry means is controlled to a predetermined position. It is characterized by being moved to a position.

Further, in the above apparatus, the present invention is characterized in that the predetermined position is in an area where automatic alignment is possible.

In the above apparatus, the present invention is characterized in that the predetermined position is a center of the apparatus main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking a corneal endothelial cell photographing apparatus as an ophthalmic apparatus as an example.

FIG. 1 is an external view of a corneal endothelial cell photographing apparatus as an ophthalmologic apparatus according to an embodiment of the present invention. As shown in FIG. 1, the corneal endothelial cell imaging apparatus includes a fixed base 100 in which a device power supply (not shown) is built in and an imaging apparatus body B mounted on the fixed base 100. The photographing apparatus main body B includes a movable base (frame) B1 disposed on the fixed base 100, an alignment mechanism storage unit B2 disposed on the movable base B1, and an optical system storage disposed on the alignment mechanism storage unit B2. Unit B
And 3.

FIG. 2 is a view showing the configuration of a movable base of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. As shown in FIG. 2, the movable base B1 includes a movable base body 71 and a base cover-1 that covers the movable base body 71.
01. The movable base body 71 is mounted on the fixed base 100 so as to be slidable right and left and back and forth. The movable base body 71 has a shaft insertion hole 7 that is provided in the left-right direction (X direction).
1a and an insertion hole 71b that opens at a right angle to the shaft insertion hole 71a and opens at the upper surface.

The shaft 72 slidably passes through the shaft insertion hole 71a. Wheels 73 a and 73 b are fixed to both ends of shaft 72. The wheels 73a and 73b move back and forth while being guided by rails (not shown) provided in the front-rear direction (Z direction) provided on the fixed base 100. Thereby, the fixed base 100 can move left, right, front and back.

A push-pull solenoid 74 whose axis is directed up and down is fixed to the movable base body 71 as an electric lock unit (electromagnetic lock unit). The push-pull solenoid 74 has a solenoid 74a and an actuator rod 74b which is advanced from the solenoid 74a by supplying current to the solenoid 74a, and the tip of the actuator rod 74b is inserted into the insertion hole 71b. When the actuator rod 74b is advanced from the solenoid 74a by supplying current to the solenoid 74a, the distal end thereof is pressed against the shaft 72 to fix the movable base body 71 to the shaft 72. In addition,
The movable base body 71 can be fixed to the shaft 72 using a drive unit other than the push-pull solenoid 74.

Further, the movable base B1 can be moved in the front-back direction (Z direction), the up-down direction (Y direction), and the left-right direction (X direction) by a joystick 102 used as a control lever by manual operation by an examiner or the like. It is provided in. The joystick 102 is provided with a photographing switch 103 for photographing corneal endothelial cells by manual operation.

The joystick 102 has a rotating portion 102 'rotatable around its axis, and the rotating portion 102' is configured to be rotatable by about 40 degrees in both the left and right directions about the reference position. . The rotation direction of the rotating unit 102 'is detected by a rotary encoder (not shown), and a motor 104 described later is controlled based on the detection result. Thereby, the optical system storage unit B3 is moved in the vertical direction (Y direction). That is, in the embodiment of the present invention, the drive mechanism based on the manual operation of the joystick 102 is also used as a drive mechanism for automatic alignment described later. However, it is of course possible to provide both drive mechanisms separately. The chin rest 400 may be configured to be driven up and down based on the detection result of the rotary encoder.

FIG. 3 is a diagram showing a configuration of an alignment mechanism of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. As shown in FIG. 3, the alignment mechanism storage unit B2 is provided with an alignment drive mechanism I for performing automatic alignment on the subject's eye. The alignment drive mechanism I includes a lifting / lowering (Y-direction movement) mechanism, a lateral (X-direction) movement mechanism, and a forward / backward (Z-direction) movement mechanism.

The elevating mechanism includes a motor 104 fixed to the upper portion of the movable base B1 for driving up and down, and a movable base B1.
Can be moved vertically (Y direction) (that is, it can be moved up and down)
And a support 105 held by the support. The motor 104 and the support 105 are connected to a pinion rack (not shown).
The column 105 is raised and lowered by the motor 104 and the column 10
The table 106 is fixed to the upper end of the table 5.

The horizontal moving mechanism includes a column 107 and a motor 108 fixed on the table 106, a table 109 slidably held at the upper end of the column 107 in the left-right direction (X direction), and one end of the table 109. It has a rack 110 provided and a pinion 111 provided on the output shaft of the motor 108. The pinion 111 is engaged with the rack 110.

The front-rear movement mechanism includes a motor 112 and a support 113 fixed to an upper portion of the table 109, and a motor 1
A pinion 114 provided on the output shaft 12 and a support 11
Case 11 of optical system storage unit B3 provided on 3
And 5. FIG. 4 is a diagram showing a configuration of an alignment mechanism of a corneal endothelial cell photographing apparatus, which is an ophthalmologic apparatus according to an embodiment of the present invention, and a configuration of a corneal endothelial cell observation and photographing optical system. The optical system storage unit B3 includes a case 115 and a case 11
Corneal endothelial cell observation and imaging optical system 116 provided in
And a control circuit (CPU) 200. Case 1
Reference numeral 15 is slidably held in the front-rear direction (Z direction). A rack 117 is provided on the side of the case 115,
The rack 117 is engaged with the pinion 114.

The motors 104, 108, and 112 move the optical system storage unit B3 based on the light detection output of the corneal endothelial cell observation optical system 116. Motor 10
Reference numeral 4 is used for automatically aligning the optical system housing unit B3 with the eye E in the Y direction, and the motor 108 is connected to the X of the optical system housing unit B3 with respect to the eye E.
The camera 112 is used to automatically perform the alignment in the directions.
To automatically perform the alignment in the Z direction. When the reflected light of the alignment index light from the cornea C is incident on the XY direction alignment detection sensor 4 'and "automatic" is selected by a mode changeover switch described later, the motors 104, 108 and 112 can be driven. Note that stepping motors (pulse motors) capable of position control are used as the motors 104, 108, and 112.

FIG. 5 is a diagram showing a configuration of an optical system for observing and photographing corneal endothelial cells of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. The optical system 116 of the corneal endothelial cell observation and imaging apparatus includes the anterior eye observation optical system 1, the illumination optical system 28 and the observation and imaging optical system 29 arranged on both sides of the anterior eye observation optical system 1.

The anterior segment observation optical system 1 includes a half mirrors 2 and 4, an objective lens 3, a CCD (charge coupled device) camera 5, and an anterior segment illumination light source 7 for illuminating the anterior segment of the eye E to be examined. The half mirrors -2 and 4, the objective lens 3, and the CCD camera 5 are arranged along the optical axis O1. The reflected light from the anterior segment of the eye E illuminated by the anterior segment illumination light source 7 is guided to the CCD camera 5 via the half mirror 2, the objective lens 3, and the half mirror 4.

FIG. 6 is a view showing a part of the configuration of an optical system of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. The half mirror-2 constitutes a part of the alignment target light projection optical system 8. When performing alignment using the alignment index light projection optical system 8, the anterior segment illumination light source 7 is turned on to illuminate the anterior segment of the eye E to be examined. Thereby, the reflected light from the anterior segment of the eye E is received by the CCD camera 5 via the half-mirror-2, the objective lens 3, and the half-mirror-4. It is imaged.

The alignment target light projection optical system 8 has an alignment target light projection light source 9, a pinhole plate 10, a projection lens 11, a stop 12, and a half mirror 13. The pinhole plate 10 is arranged at the focal point of the projection lens 11. Part of the light from the alignment index light projecting light source 9 passes through the pinhole plate 10 to become alignment index light, and then becomes parallel light by the projection lens 11. A part of the alignment index light is reflected by the half mirror 13, is reflected by the half mirror 2 via the projection lens 11 and the stop 12, and is guided to the cornea C of the eye E.

The fixation target projection optical system 14 includes a fixation target projection light source 17 and a pinhole plate 18. As the fixation target projection light source 17, a light emitting diode for projecting the fixation target to the eye E is used. The fixation target light from the fixation target projection optical system 14 passes through the half mirror 13, the projection lens 11, the stop 12, and the half mirror 2 to the cornea C of the eye E to be examined.
It is led to. Thereby, the fixation target is presented to the eye E. Note that the alignment is performed while the subject is fixated on the fixation target.

The alignment index light projected from the alignment index light projecting light source 9 onto the cornea C of the eye E is reflected on the surface of the cornea C, and is a virtual image at an intermediate position between the corneal vertex P and the corneal curvature center O3. To form A part of the alignment index light reflected from the cornea C passes through the half mirror-2 and is converged by the objective lens 3, and is separated into two light components by the half mirror-4 during the convergence.

The light reflected by the half mirror-4 is XY
It is guided to the direction alignment detection sensor 4 '. The XY direction alignment detection sensor 4 'has a light detection surface 4'a on which reflected light of the alignment index light forms an image. As the XY direction alignment detection sensor 4 ', a PSD sensor or an area CCD camera capable of detecting positions in the X direction and the Y direction can be used. When light is received by the light detection surface 4 ′ a of the XY direction alignment detection sensor 4 ′, each light receiving element outputs a detection signal corresponding to a light reception address (address) to the detection circuit 60. On the other hand, the light transmitted through the half mirror-4 is guided to the CCD camera 5 to form an image.

The alignment pattern projection optical system 21 includes:
Alignment pattern projection light source 22, alignment pattern plate 2 on which an annular pattern (not shown) is formed
3 and a projection lens 24. The half mirror 4 reflects light from the alignment pattern projection optical system 21 toward the CCD camera 5, and forms an annular pattern image on the CCD camera 5.

FIG. 7 is a block diagram showing a configuration of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. After image processing is performed by the control circuit 200 based on the image signal output from the CCD camera 5, as shown in FIG. 1, an annular pattern image is displayed on the display screen 90a of the monitor 90 together with the eye image E 'to be inspected. 93 and 94 are displayed.

In FIG. 1, the area inside the annular pattern image 93 is an automatically photographable area S2, and the area between the annular pattern images 93 and 94 is an automatically alignable area S1. Automatic alignment area S1
Are reflected light from the cornea C by the alignment index light projection optical system 8 is incident on the XY direction alignment detection sensor 4 ', and the motors 104, 108,
And 112 are areas indicating that they are ready to operate. Further, the automatic photographable area S2 is an area indicating that the relative position between the subject's eye E and the photographing apparatus main body B becomes appropriate due to the automatic alignment, and photographing is possible. Note that the automatic photographable area S2 is also an area indicating that the relative position between the subject's eye E and the photographing apparatus main body B becomes appropriate due to manual alignment, and that photographing is possible.

The illumination optical system 28 for illuminating the cornea C of the eye E with illumination light from an oblique direction includes an illumination light source 3 for observation.
0, condenser lenses 31 and 33, infrared filter 31 ',
Illumination light source 32 for photography, slit plate 34, light projection lens 3
5, and dichroic mirror 37. The dichroic mirror 37 is provided between the infrared filter 31 'and the slit plate 34. An infrared light emitting LED is used as the imaging illumination light source 30, and a xenon (Xe) lamp is used as the imaging illumination light source 32. Slit plate 3
4 has an elongated rectangular slit 36 formed therein.

The infrared light from the observation illumination light source 30 is guided to the light projecting lens 35 via the condenser lens 31, the infrared filter 31 ', the dichroic mirror 37, and the slit 36. The illumination light from the imaging illumination light source 32 is:
The light is guided to the light projecting lens 35 via the condenser lens 33, the dichroic mirror 37, and the slit 36. When the alignment is completed, the slit plate 34 and the cornea C are substantially conjugate with respect to the light projecting lens 35, and the cornea C is irradiated with the slit light. Part of the slit light enters the inside of the cornea C, and the rest is reflected on the surface of the cornea C.

The observation / photographing optical system 29 comprises two objective lenses 40 and 40 ', a half mirror 41, a mask 42, mirrors 44 and 46, a relay lens 45, and a Z-direction alignment detection sensor (line sensor) 47. Is done. The reflected light from the cornea C is reflected by the objective lenses 40 and 4
The light is guided to the half mirror 41 via 0 ', a part of the light is transmitted, and the rest is reflected. The reflected light transmitted through the half mirror 41 is guided to the mask 42. The mask 42 is used to block extra reflected light other than forming a corneal endothelial cell image. The reflected light forming the corneal endothelial cell image is a mirror.
The light is reflected by the mirror 46 via the relay 44 and the relay lens 45 to form an image on the CCD camera 5.

On the other hand, the light reflected by the half mirror 41 enters the Z-direction alignment detection sensor 47. The Z-direction alignment detection sensor 47 includes a large number of light receiving elements for performing alignment (Z-direction alignment) of the imaging apparatus main body B with respect to the eye E in the optical axis direction on the light detection surface 47a.
Are arranged in a line. When light is received by the light detection surface 47a of the Z direction alignment detection sensor 47,
Each light receiving element outputs a detection signal corresponding to the light receiving address (address) to the detection circuit 47 '. When the alignment of the imaging apparatus main body B with the eye E is completed, the mask 42 and the cornea C are almost conjugate with respect to the objective lenses 40 and 40 '.

When the peak value of the detection signal of each light receiving element of the Z-direction alignment detection sensor 47 (the peak value of the reflected light from the corneal endothelial cells of the eye E) matches the predetermined light-receiving address of the Z-direction alignment detection sensor 47 That is, upon receiving a peak signal (detection signal) output from a predetermined light receiving address of the Z-direction alignment detection sensor 47, the detection circuit 47 'outputs a Z-direction alignment completion signal to the control circuit 200. In response to the Z-direction alignment completion signal, the control circuit 200 controls the light emission of the photographing illumination light source 32 by the light emission control circuit 202.

The light shielding plate 48 is composed of the relay lens 45 and the mirror-4.
The light path between the half mirror 4 and the CCD camera 5 (the light path of the anterior eye observation optical system) is provided in a light path between the half mirror 4 and the CCD camera 5 by a solenoid 48a. ) Is provided so as to be able to be inserted and removed by a solenoid 49a. At the start of the alignment, the light shielding plate 48 is inserted into the optical path of the observation and imaging system, and the light shielding plate 49 is retracted from the optical path of the anterior eye observation system.

When the alignment bright spot image 95 enters the automatic photographable area S2, the control circuit 200 controls the solenoid 49a to insert the light shielding plate 49 into the optical path of the anterior ocular segment observation optical system, and causes the solenoid 48a to move. Control the shading plate 48
Is retracted from the optical path of the observation / photographing optical system. This allows
The observation state of the anterior segment of the eye E is switched to the corneal endothelial cell imaging state.

As shown in FIG. 7, the control circuit 200
CD camera 5, detection circuits 47 'and 60, solenoids 48a, 49a, and 74a, monitor 90, shooting switch 103, drivers 104a, 108a, and 11
2a, an information recording / reproducing device 210 for recording image information of a photographed corneal endothelial cell image, a light emission control circuit 202, and a memory 2
11. Mode switch 250 for performing automatic / manual switching, left limit switch 301, right limit switch 30
2, rear limit switch 311, and front limit switch 31
2, the CCD camera 5, the detection circuit 47 '
And 60, shooting switch 103, information recording / reproducing device 2
10, various information is input from the memory 211, the mode changeover switch 250, the left limit switch 301, the right limit switch 302, the rear limit switch 311, the front limit switch 312, and the like. The control circuit 200 processes various input information, and performs various controls based on the information.

The control circuit 200 includes the light emission control circuit 2
02, the light source 7 for anterior segment illumination, the light source 9 for alignment index light projection, the light source 17 for fixation target projection,
The light emission control of the alignment pattern projection light source 22, the observation illumination light source 30, and the imaging illumination light source 32 is performed.

Next, the operation of the corneal endothelial cell photographing apparatus, which is the ophthalmic apparatus according to the embodiment of the present invention, will be described. In the corneal endothelial cell imaging device according to the embodiment of the present invention,
Prior to photographing the corneal endothelial cells of the eye E, rough alignment is performed manually, and then fine alignment is performed automatically.

FIGS. 8 and 9 are views showing limit switches and the like of a movable base of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention. As shown in FIGS. 8 and 9, in order to detect the movement limit of the movable base B1, a left limit switch 301, a right limit switch 302, a left limit detection groove 303, a right limit detection groove 304, A limit switch 311, a front limit switch 312, a rear limit detection groove 313, and a front limit detection groove 314 are provided.

As shown in FIG. 10, usually, the optical system storage unit B3, which is a photographing unit of the photographing apparatus main body B, is initialized to a predetermined position and is located substantially at the center of the movable base B1. The examiner operates the joystick 102 to move the movable base B1, thereby roughly adjusting the position of the optical system storage unit B3 with respect to the eye E (coarse alignment). By this rough alignment, an alignment bright spot image 95 is placed in the automatically alignable area S1.
, Automatic alignment is started (fine alignment). Thereafter, when the alignment bright spot image 95 enters the automatic photographable area S2, the photographing of the corneal endothelial cells is automatically performed.

Before the automatic alignment is started, the optical system housing unit B3, which is a photographing unit, has been moved to the eye E, for example, to the right side of the position after the above-described initialization due to the incidence of disturbance light or the like (FIG. 11), the examiner operates the joystick 102 so that the alignment bright spot image 95 falls within the automatically alignable area S1. However, when the moving amount of the optical system housing unit B3 is large, that is, when the optical system housing unit B3 has moved far to the right, for example, from the position after the above-described initialization, the alignment brightness is within the automatic alignment enabling area S1. Point image 95
Therefore, the movable base B1 cannot be moved by the rough alignment so as to enter the position, and a left movement limit of the movable base B1 occurs.

In this case, the state of the left limit switch 301 changes due to the presence of the left limit detection groove 303, and the movable base B
It detects that 1 has reached the left movement limit. In response to this detection result, the optical system housing unit B3 is moved to the left and positioned at the position after the above-mentioned initialization (initialization). As a result, the optical system storage unit B3 is positioned substantially at the center of the movable base B1, so that the examiner operates the joystick 102 to perform the rough alignment, thereby setting the alignment bright spot image 95 in the automatically alignable area S1.
And automatic alignment can be performed.

In a state where the optical system housing unit B3 has largely moved to the left side due to the incidence of disturbance light or the like, the right limit detection groove 304 is present while the movable base B1 is moving rightward by coarse alignment. If it is detected that the state of the right limit switch 302 has changed and the right movement limit has been reached, the optical system storage unit B3 is moved rightward and initialized to the position after the above-described initialization.

In addition, before the alignment is started, the optical system housing unit B3, which is a photographing unit, is moved, for example, rearward from the position after the above-described initialization with respect to the eye E due to the incidence of disturbance light or the like before the start of alignment. (See Fig. 12)
In the case of performing the rough alignment by the operator, the examiner operates the joystick 102 so that the alignment bright spot image 95 falls within the automatically alignable area S1. However, when the moving amount of the optical system storage unit B3 is large, that is,
When the optical system storage unit B3 has moved farther, for example, to the rear than the position after the above-described initialization, the alignment luminescent spot image 95 is displayed in the automatically alignable area S1.
The movable base B1 cannot be moved by the rough alignment so that the movement of the movable base B1 may occur, and a front movement limit of the movable base B1 occurs.

In this case, the state of the front limit switch 312 changes due to the presence of the front limit detection groove 314, and the movable base B
It detects that 1 has reached the previous movement limit. In response to the detection result, the optical system housing unit B3 is moved in the forward direction and positioned at the position after the above-mentioned initialization (initialization). As a result, the optical system storage unit B3 is positioned substantially at the center of the movable base B1, so that the examiner operates the joystick 102 to perform the rough alignment, thereby setting the alignment bright spot image 95 in the automatically alignable area S1.
And automatic alignment can be performed.

In the state where the optical system housing unit B3 has largely moved to the front side due to the incidence of disturbance light or the like, while the movable base B1 is moving backward in the rough alignment, the presence of the rear limit detection groove 313 causes the movable base B1 to move backward. When it is detected that the state of the rear limit switch 311 has changed and the rear movement limit has been reached, the optical system housing unit B3 is moved in the forward direction to initialize to the position after the above-mentioned initialization.

[0050]

As described above, according to the present invention, when the movement limit of the movable base moving in the rough alignment of the ophthalmologic apparatus is detected, the photographing unit is moved in a predetermined direction with respect to the left-right direction or the front-back direction. To initialize. Therefore, in the case where the rough alignment is performed in a state where the photographing unit has been moved by the incidence of disturbance light or the like, it is possible to prevent the movable base from reaching the movement limit and preventing photographing.

[Brief description of the drawings]

FIG. 1 is an external view of a corneal endothelial cell imaging apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a movable base of the corneal endothelial cell photographing apparatus as the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of an alignment mechanism of the corneal endothelial cell photographing apparatus which is the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an alignment mechanism of a corneal endothelial cell photographing apparatus, which is an ophthalmologic apparatus according to an embodiment of the present invention, and a configuration of an optical system for corneal endothelial cell observation photographing.

FIG. 5 is a diagram showing a configuration of an optical system for observing and photographing corneal endothelial cells of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 6 is a diagram showing a part of a configuration of an optical system of a corneal endothelial cell photographing apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a corneal endothelial cell imaging apparatus which is an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 8 is a view showing a limit switch and the like of a movable base of the corneal endothelial cell photographing apparatus which is the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 9 is a view showing a limit switch and the like of a movable base of the corneal endothelial cell photographing apparatus which is the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 10 is a view for explaining a positional relationship between a movable base and a photographing unit of the corneal endothelial cell photographing apparatus which is the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 11 is a view for explaining a positional relationship between a movable base and a photographing unit of the corneal endothelial cell photographing apparatus as the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 12 is a view for explaining a positional relationship between a movable base and a photographing unit of the corneal endothelial cell photographing apparatus which is the ophthalmologic apparatus according to the embodiment of the present invention.

[Explanation of symbols]

 B Imaging apparatus body B1 Movable base B2 Alignment mechanism housing unit B3 Optical system housing unit C Cornea E Eye to be examined 1 Anterior ocular segment observation optical system 8 Alignment index light projection optical system 14 Fixation target projection optical system 21 Alignment pattern projection optical system 28 Illumination optical system 29 Observation imaging optical system 100 Fixed base 102 Joystick 116 Optical system of corneal endothelial cell observation imaging apparatus 200 Control circuit 301 Left limit switch 302 Right limit switch 303 Left limit detection groove 304 Right limit detection groove 311 Rear limit switch 312 Before Limit switch 313 Rear limit detection groove 314 Front limit detection groove

Claims (4)

[Claims] 1. An apparatus main body, an optometry unit provided in the apparatus main body for performing an optometry, a first alignment unit for aligning the apparatus main body with an eye to be examined, and a optometry unit for the eye to be examined. An ophthalmologic apparatus comprising: a second alignment unit that performs alignment; a detection unit that detects a movement limit of the apparatus main body; and a control unit that controls an operation of the second alignment unit based on a detection result of the detection unit. An ophthalmologic apparatus comprising: 2. When the apparatus main body reaches a movement limit by the operation of the first alignment unit, the control unit controls the operation of the second alignment unit to move the optometry unit to a predetermined position. The ophthalmic apparatus according to claim 1, wherein: 3. The ophthalmologic apparatus according to claim 2, wherein the predetermined position is within an area where automatic alignment is possible. 4. The ophthalmologic apparatus according to claim 2, wherein the predetermined position is a center of the apparatus main body.