JP2009291251A - Ophthalmic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To favorably align subject's eyes. <P>SOLUTION: The ophthalmic apparatus for examining or measuring a subject's eye, has: a moving base disposed to mechanically horizontally move on a base by an operation of an operation member; an optometry section disposed to horizontally move on the moving base by the driving of a first electric mechanism section; fixing means for fixing the moving base to the base; mode changeover means changing over between an automatic mode for aligning the subject's eye by the actuation of a first electric drive mechanism section, with the moving base fixed to a predetermined position on the base by the fixing means, and a manual mode for aligning the subject's eye by the operation of the operation member, with the fixed moving base released; and drive control means moving the moving base to the predetermined position by the driving of a second electric mechanism section based on an input of a changeover signal from the manual mode to the automatic mode. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ophthalmologic apparatus that performs examination, measurement, and the like of a subject's eye.

As an ophthalmologic apparatus that aligns the optometric part with respect to the subject's eye and performs optometry of the subject's eye by means of an inspection / measurement system built in the optometric part, the joystick is manually operated by the examiner One having an alignment mechanism that mechanically horizontally moves a moving table on which an optometric unit is placed with respect to a base is known. In addition, by providing a driving mechanism that can move the optometry part in the front, rear, left, right, up and down directions on such a moving table, precise alignment with the subject eye after rough alignment by joystick operation is automated. Is known (see Patent Document 1).
JP-A-8-98808

  By the way, in the case of the apparatus as described above, since the moving table is mechanically moved by the operation of the joystick, it is easy to reflect the intention of the examiner, and the operability in the precise alignment is high, but the right and left eyes are changed. In some cases, it is necessary for the examiner to move the moving table by using a joystick, which is troublesome.

  In view of the above problems, it is an object of the present invention to provide an ophthalmologic apparatus capable of suitably performing alignment with a subject's eye.

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

(1) In an ophthalmologic apparatus for examining or measuring a subject's eye,
A moving table that is mechanically horizontally movable on the base by operation of the control member;
An optometry unit arranged to be horizontally movable on the movable table by driving the first electric mechanism unit;
Fixing means for fixing the movable table to the base;
An auto-alignment mode in which alignment with respect to a subject's eye is performed by driving the first electric drive mechanism unit in a state where the moving table is fixed at a predetermined position on the base by the fixing means, and fixing of the moving table A mode switching means for switching between a manual alignment mode for performing alignment with respect to the subject's eye by operating the steering member in a state in which is released.
Drive control means for moving the moving table to the predetermined position by driving a second electric mechanism unit based on an input of a switching signal from the manual alignment mode to the auto alignment mode by the mode switching means. To do.
(2) In the ophthalmic apparatus according to (1),
The second electric mechanism section includes a drive motor for horizontally moving the movable table, an arm connected to the drive motor and moved by driving the drive motor, and disposed opposite the arm. A fixing member pressed by a tip, and one of the drive motor and the fixing member is arranged on the base and the other is arranged on a moving table, and the fixing member is pressed by movement of the arm. The moving table is moved to a predetermined position on the base.
(3) In the ophthalmologic apparatus according to (2), a guide surface for guiding the movement of the arm is formed on the fixing member, and the second electric mechanism unit moves the arm along the guide surface. Thus, the moving table is moved to a predetermined position on the base.
(4) In the ophthalmologic apparatus according to (3), the drive motor is a drive motor having a gear head mechanism, and the second electric mechanism unit also serves as the fixing means.

  The alignment with respect to the subject's eye can be suitably performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of an ophthalmologic apparatus according to this embodiment.

  The face support unit 10 includes a forehead pad 11 and a chin rest 12 that is moved by a drive mechanism (not shown), and is fixed to the base 1 of the ophthalmologic apparatus 100. Further, an eye level marker 14 is provided on the support column that supports the forehead pad 11.

  The movable table 3 is disposed so as to be movable (slidable) in the horizontal (XZ) direction on the base 1 by a sliding mechanism (see FIG. 2). The optometry unit 5 is placed on the movable table 3 and accommodates an optometry optical system and the like. Here, the sliding mechanism mechanically moves the moving table 3 with respect to the base 1 through manual operation on a joystick (control member) 4 provided on the moving table 3 (by mechanical operation without using an electric mechanism). Used as a manual movement mechanism for movement.

  Further, the optometry unit 5 is provided with an examination window 5a for a subject to look inside the housing of the optometry unit 5, and a light beam from the optometry optical system arranged in the housing is received through the examination window. Light is projected to the examiner's eyes. Reference numeral 50a denotes an imaging window of the second imaging optical system 50 (see FIG. 4) for simultaneously imaging the subject's eye and its periphery.

  Further, the optometry unit 5 is arranged to be movable in the horizontal (XZ) direction on the movable table 3 by driving of the XZ drive unit 7 (first electric mechanism unit). Further, the optometry unit 5 is arranged so as to be movable in the vertical (Y) direction with respect to the movable table 3 by driving the Y drive unit 6. Here, when the Y drive unit 6 and the XZ drive unit 7 are driven, the optometry unit 5 is moved in the XYZ directions with respect to the moving table 3, and as a result, the optometry unit 5 is moved with respect to the subject's eye. Can move in a three-dimensional direction.

  The joystick 4 is provided on the movable table 3 and is operated by the examiner. When the joystick 4 is operated in the front / rear / right / left direction, the movable table 3 is moved in the XZ direction (horizontal direction) with respect to the base 1 by the above-described sliding mechanism. 5 is moved in the XZ direction. When the rotary knob 4a of the joystick 4 is rotated, the Y drive unit 6 is driven and the optometry unit 5 is moved in the Y direction (vertical direction). When a measurement start switch 4b provided on the top of the joystick 4 is pressed, a measurement start trigger signal is generated. Further, a monitor 8 and a control unit 74 for performing various settings such as measurement conditions are provided on the examiner side of the movable table 3. Further, a chin rest switch 9 b for moving the chin rest 12 up and down is provided on the side surface of the examiner side of the base 1.

  The movable table 3 is arranged so as to be movable in the horizontal direction on the base 1 by driving the second electric mechanism unit (drive mechanism 200) (see FIG. 2). FIG. 2 is a schematic configuration diagram for explaining a sliding mechanism for moving the moving base 3 horizontally with respect to the base 1 by manual operation and a driving mechanism for moving the moving base 3 to a predetermined position on the base 1 by electric drive. It is. 2A is a view when the movable base 3 is released, and FIG. 2B is a view when the movable base 3 is fixed.

  The sliding mechanism 109 is connected to two Z guide shafts 110 extending in the Z direction, a connecting member 111 for connecting the Z guide shaft 110 and the base 1, and a slide base 3 a formed at the lower part of the moving base 3. An X guide shaft 112 extending in the X direction, and a moving member 114 having a bearing into which the Z guide shaft 110 is inserted and a bearing into which the X guide shaft 112 is inserted. Used to move the moving table 3 horizontally with respect to the table 1. The operation shaft of the joystick 4 is inserted into the hole 116 formed at the rear of the slide base 3a.

  The drive mechanism 200 includes a drive motor 201 fixed to the lower part of the movable table 3 (more specifically, the slide base 3a), a lock arm 202 connected to the drive motor 201 and rotated by the drive of the drive motor 201, and a base. A guide member 250 that is fixed to the left and right center position of the base 1 (more specifically, the upper surface of the connecting member 111) and guides the lock arm 202, and for moving the movable base 3 to a predetermined position on the base 1 Used for.

  The drive motor 201 is a motor with a gear head 201a, and the output shaft provided at the tip of the gear head 201a is connected to the base end of the lock arm 202. When the drive motor 201 is driven to rotate, the drive motor 201 is provided at the tip of the gear head. The lock arm 202 is rotated around the output shaft. Here, the lock arm 202 is moved between a retracted position (see FIG. 2A) and a locked position (see FIG. 2B). Note that the gear head 201a provided in the drive motor 201 has a high gear ratio so that the movement of the movable table 3 relative to the base 1 can be locked when the lock arm 202 is disposed at the lock position. The rotational load is set high.

  In addition, a position detection unit that detects whether or not the moving table 3 is at a predetermined position on the base 1 set for full auto control (details will be described later) is provided below the moving table 3. It has been. More specifically, microswitches 204 and 205 are provided as sensors for detecting the position of the movable table 3 by detecting the rotational position of the lock arm 202, and the microswitch 204 is in the retracted position. When placed, the switch is pressed and a detection signal is emitted. Further, when the lock arm 202 is arranged at the lock position, the micro switch 205 is pressed and a detection signal is generated.

  On the other hand, a guide surface 251 having a surface perpendicular to the horizontal plane is formed in the guide member 250 in a V shape as shown in FIG. The guide surface 251 is formed so as to face the direction opposite to the subject's eye direction (the apparatus rear side), and extends from the V-shaped tip to the left diagonally rear side, and the V-shaped tip to the right. It has the 2nd guide surface 253 extended diagonally back, and the recessed part 255 formed in the front-end | tip of V shape, and is used in order to guide the moving direction of the lock arm 202. FIG. A ball bearing 203 is attached to the tip of the lock arm 202 so that the lock arm 202 moves smoothly on the guide surface 251. In the above configuration, the recess 255 is provided at the V-shaped tip. However, if the V-shaped tip is formed with a curvature smaller than the radius of the ball bearing 203, the recess 255 is not necessarily provided. There is no need to provide it.

  The guide member 250 is fixed at a position where the tip of the lock arm 202 and the guide surface 251 come into contact when the lock arm 202 is moved in the A direction (pressing direction) from the retracted position. In this case, for example, the concave portion 255 is disposed at the center of the left and right of the base 1, the first guide surface 252 is disposed on the left side, and the second guide surface 253 is disposed on the right side. 202 is arranged on the movable table 3.

  Returning to FIG. Here, as shown in FIG. 2A, when the lock arm 202 is in the retracted position, the lock arm 202 and the guide member 250 are arranged at positions that do not interfere with each other. Here, when a force in the Z direction is applied from the examiner to the joystick 4 (see FIG. 1), the moving member 114 is moved along the Z guide shaft 110, and the moving table 3 is moved in the Z direction. . When a force in the X direction is applied from the examiner to the joystick 4, the moving member 114 is moved along the X guide shaft 112, and the moving table 3 is moved in the X direction. That is, since the movable table 3 can move in the horizontal direction with respect to the base 1, manual alignment by an examiner using the joystick 4 is possible.

    On the other hand, as shown in FIG. 2B, when the lock arm 202 is in the locked position, the lock arm 202 and the guide member 250 interfere with each other, and the movable table 3 is locked at a predetermined position on the base 1. Even if the examiner moves the moving table 3, the movement is prohibited and the moving table 3 is fixed. That is, the drive mechanism 200 described above also serves as a lock mechanism for fixing the movable table 3 to the base 1 at a predetermined position, and the movable base 3 is fixed to the base 1 at a predetermined position. It is also used as a switching mechanism for switching between a state and a fixed release state in which the movable table 3 is fixed to the base 1. Therefore, the above-described micro switches 204 and 205 are also used as a lock detection unit that detects whether the movable base 3 is in a fixed state or a fixed release state. More specifically, the microswitch 204 is used as a sensor for detecting that the movable base 3 is released, and the microswitch 205 is used as a sensor for detecting that the movable base 3 is fixed.

  FIG. 3 is a diagram for explaining the operation of the drive mechanism 200, and is a view when the drive mechanism 200 is viewed from above.

  FIG. 3A is a view when the lock arm 202 is placed in the retracted position. More specifically, it is a view when the movable base 3 is arranged on the right side with respect to the left and right central position C1 on the base 1. In this case, the left and right center position C2 of the movable table 3 is positioned on the right side with respect to the left and right center position C1 of the base 1.

  Here, when the lock arm 202 placed at the retracted position is moved in the A direction, the ball bearing 203 provided on the lock arm 202 comes into contact with the guide surface 251 (see FIG. 3B). The movement of the lock arm 202 in the A direction is restricted by the guide surface 251, the guide surface 251 is pressed from the ball bearing 203, and a resistance (reaction force) against the pressing force is applied to the ball bearing 203. When the moving table 3 is on the right side of the left and right center position, the ball bearing 203 is in contact with the second guide surface 253. When the moving table 3 is on the left side of the left and right center position, the ball bearing 203 is on the first guide surface. 252 is contacted. However, since the ball bearing 203 is moved on a predetermined circumference, when the moving base 3 is in the vicinity of the left and right center position, it abuts on any of the first guide surface 252, the second guide surface 253, and the recess 255. Is done.

  Then, when the rotational position of the lock arm 202 whose movement is restricted by the guide surface 251 changes, the movable table 3 is moved backward in accordance with the change of the rotational position (see FIG. 3C). ). Further, since the ball bearing 203 is moved forward along the guide surface 251 and approaches the recess 255, the moving table 3 is moved to the left and right center position C1 in accordance with the movement of the ball bearing 203 toward the recess 255. To go.

  When the ball bearing 203 reaches the concave portion 255 in this manner, the movable table 3 reaches the rearmost end position in the movable range in the Z direction and reaches the center position on the left and right sides of the base 1 (the base 1 The left-right center position C1 and the left-right center position C2 of the movable table 3 coincide with each other) (see FIG. 3D). As a result, the movable table 3 is moved to a predetermined position on the base 1.

  Here, when the lock arm 202 reaches the lock position, a detection signal is issued from the micro switch 205 and the drive of the drive motor 201 is stopped. In the above operation, when the contact start position of the ball bearing 203 with respect to the guide surface 251 is the concave portion 255, the lock arm 202 reaches the lock position after the movable table 3 is moved to the rear end position.

  As described above, the movable table 3 is locked at a predetermined position on the base 1, and even if the examiner moves the movable table 3, the movement is prohibited and the movable table 3 is moved. Is fixed.

  When the lock arm 202 placed at the lock position is moved in the B direction, the contact state with the guide member 250 is released. Then, when the rotational position of the lock arm 202 is further changed and moved to the retracted position, a detection signal is issued from the micro switch 204.

  FIG. 4 is a schematic configuration diagram illustrating the configuration of the optical system and the control system provided in the optometry unit 5. An objective lens 17, a beam splitter 13, and an optometry optical system 5b are disposed on the optical path O1. A light beam emitted from the optometry optical system 5b is directed to the subject's eye via the beam splitter 13 and the objective lens 17. Incident. Then, the reflected light from the subject's eye enters the optometry optical system 5b via the objective lens 17 and the beam splitter 13, and has predetermined eye characteristics (for example, eye refractive power, fundus image, anterior eye section image). Etc.) Note that L1 is the optical axis of the objective lens 17, and also serves as the optical axis of the optometry optical system 5b and the optical axis of the first photographing optical system 60 described later.

  Further, in front of the anterior segment of the eye E, a ring index projection optical system 40 that emits near-infrared light for projecting the ring index onto the cornea Ec of the eye E, and an infinite index on the cornea Ec of the eye E The working distance index projection optical system 41 that emits near-infrared light for detecting the alignment state in the working distance direction with respect to the subject's eye by projecting is symmetrical with respect to the optical axis L1 (in FIG. Is arranged in). The ring projection optical system 40 is also used as anterior segment illumination for illuminating the anterior segment of the eye E.

  The anterior ocular segment imaging optical system for imaging the anterior ocular segment of the subject's eye includes a first imaging optical system 60 for imaging the anterior segment of the subject's eye and a peripheral region including the anterior segment of the subject's eye. A second photographing optical system 50 for photographing. Here, the second imaging optical system 50 includes a lens 51 and a two-dimensional light receiving element 52, and images the anterior segment at a lower magnification than the first imaging optical system 60 (see FIG. 5). Here, the reflected light from the anterior segment illuminated by near infrared light is received by the two-dimensional light receiving element 52 via the lens 51. Then, the output of the two-dimensional light receiving element 52 is sent to the control unit 70 described later.

  In the present embodiment, the second imaging optical system 50 is disposed immediately below the objective lens 17 (see FIG. 1), and an imaging range in which the left and right eyes and the left and right eye level markers 14 can be simultaneously photographed. (See FIG. 5).

  The first imaging optical system 60 is arranged in the reflection direction of the beam splitter 13 and has a relay lens 61, a total reflection mirror 62, a diaphragm 63, an imaging lens 64, and a two-dimensional light receiving element 65. The human eye is imaged at a high magnification, and an alignment index image projected onto the subject's eye cornea is detected by the index projection optical systems 40 and 41 (see FIG. 6). In the above optical system, reflected light from the anterior segment illuminated by near-infrared light is received by the two-dimensional light receiving element 65 via the objective lens 17, the beam splitter 13 and the relay lens 61 to the imaging lens 64. Is done. Then, the output of the two-dimensional light receiving element 65 is sent to the control unit 70 described later.

  Next, the configuration of the control system will be described. A control unit 70 controls the entire apparatus. The control unit 70 is connected to the display monitor 8 and controls the display image. In addition, the control unit 70 determines the subject eye and the optometry based on the image position (or the position of the subject eye) of the alignment index image captured by the first imaging optical system 60 or the second imaging optical system 50. The relative position with respect to the unit 5 is detected. Further, the control unit 70 includes an optometry optical system 5b, a light receiving element 65, a light receiving element 52, a Y driving unit 6, an XZ driving unit 7, a joystick 4, a control unit 74, a chin rest switch 9b, a memory 71, a driving motor 201, A micro switch 204, a micro switch 205, and the like are connected.

  Here, the control unit 70 controls the driving of the XZ driving unit 7 to move the optometry unit 5 in the horizontal direction. Further, the control unit 70 controls the drive of the drive mechanism 200 based on the input of a predetermined signal, and fixes the movable table at a predetermined position in the horizontal direction.

  The alignment mode can be switched between an auto alignment mode (hereinafter abbreviated as a full auto mode) and a manual alignment mode. In the full auto mode, the drive mechanism 200 performs a predetermined operation on the base 1. In the state in which the movable table 3 is fixed at the position, alignment with respect to the subject's eye is performed by driving the XZ drive unit 7, and in the manual alignment mode (hereinafter abbreviated as manual mode), the movable table by the drive mechanism 200 is used. In a state in which the fixation of 3 is released, alignment with respect to the subject's eye is performed by operating the joystick 4.

  More specifically, when the full auto mode is set, the control unit 70 detects the relative position between the subject's eye and the optometry unit 5 in a state where the movable table 3 is fixed, and the detection result Based on the above, the optometry unit 5 is moved by the Y drive unit 6 and the XZ drive unit 7 to sequentially align the optometry unit 5 with respect to both eyes of the subject's eye. When the manual mode is set, the optometry unit 5 is aligned with the subject's eye by moving the movable table 3. That is, the examiner specifies the position of the subject's eye based on the anterior segment image displayed on the display monitor 8, and aligns the optometric unit 5 with respect to the subject's eye by operating the joystick 4. The control unit 74 is provided with a mode changeover switch 74a for manually switching between the full auto mode and the manual mode.

  In the apparatus configuration of the present embodiment, the sliding mechanism used as a moving mechanism for horizontally moving the optometric unit 5 with respect to the subject's eye and the XZ driving unit 7 are each operated independently by the pupil of the subject. A movable range in the X direction is secured so that it can be sequentially aligned according to the distance between the two, and a movable range in the XZ direction so that the working distance direction can be sequentially aligned with the subject's eyes and the subject's nose can be avoided. Is secured.

  Note that the predetermined position of the moving table 3 on the base 1 used for full-auto control is the optometry unit for the eye of the subject by driving the XZ driving unit 7 in a state where the moving table 3 is fixed by the driving mechanism 200. 5 can be aligned in the XZ direction, there is a possibility of contact between the optometry unit 5 moved by the XZ drive unit 7 and the subject, and the optometry unit 5 moved by the XZ drive unit 7 and the face support unit 10 It is necessary to set in consideration of the possibility of contact.

  In the present embodiment, with respect to the X direction, the center position (left and right center position) in the movable range of the movable table 3 in the X direction, and with respect to the Z direction, the rearmost position in the movable range of the movable table 3 in the Z direction. Is set to a predetermined position, and the alignment operation in the full auto mode is performed in a state in which the movable table 3 is fixed at the predetermined position.

  The operation of the apparatus having the above configuration will be described. First, when the power of the apparatus is turned on, the control unit 70 determines whether or not the movable base 3 is fixed to the base 1 based on detection signals from the micro switches 204 and 205, and the above-mentioned. It is determined whether or not the movable table 3 is disposed at a predetermined position corresponding to the full auto mode set as described above. That is, the control unit 70 determines whether or not the movable table 3 is fixed at a predetermined position on the base 1.

  Then, the control unit 70 displays a message indicating the determination result on the monitor 8. Alternatively, the control unit 70 determines whether the moving table 3 is fixed at a predetermined position on the base 1, whether it is the full auto mode or the manual mode, and displays the determination result on the monitor 8.

  The examiner can select either the full auto mode or the manual mode using the mode switch 74a. Note that the mode immediately after power-on can be fixed in advance by parameter setting.

  First, the operation when the mode is switched from the manual mode to the full auto mode will be described. Here, the examiner selects the full auto mode using the mode changeover switch 74a, and performs the switching operation from the manual mode to the full auto mode. Here, the control unit 70 drives the drive motor 201 based on the input of the switching signal to the full auto mode by the mode switch 74a, and moves the lock arm 202 from the retracted position to the locked position. Then, the control unit 70 stops driving the drive motor 201 based on the detection signal output from the micro switch 205 and displays on the monitor 8 that the mode has been switched to the full auto mode.

  As a result, the movable table 3 is fixed at a predetermined position on the base 1, so that the movable table 3 does not move horizontally even if the examiner performs a tilting operation on the joystick 4.

  Further, after the mode switching to the full auto mode is completed, the control unit 70 controls the Y driving unit 6 and the XZ driving unit 7 to move the optometry unit 5 to a predetermined origin position. As the predetermined origin position, for example, it is conceivable that the origin position in the X direction of the optometry unit 5 is substantially the center position of the movable range, and the origin position in the Z direction is the position closest to the examiner.

  In the state set to the full auto mode as described above, the examiner first fixes the face of the subject to the face support unit 10 and adjusts the height of the chin rest 12 using the chin rest switch 9a. Then, when a predetermined switch operation (pressing operation on the measurement start switch 4b) is performed by the examiner, the control unit 70 performs automatic alignment with respect to the subject eye fixed to the face support unit 10 based on the operation signal. Start operation. First, the positions of both eyes of the subject's eye are detected based on a wide range of anterior segment images (low magnification images) obtained by the two-dimensional imaging device 52, and the upper and lower positions of the subject's eyes are detected based on the positional information. Adjust the horizontal alignment. In addition, the control unit 70 displays a wide range of anterior segment images by the image sensor 52 on the monitor 8 (see FIG. 5).

  More specifically, the control unit 70 extracts the black portion of the pupil by extracting the grayscale information from the captured image obtained from the two-dimensional imaging device 52, and based on this, the position of both eyes of the subject's eye is determined. To detect.

  Further, the control unit 70 obtains a deviation amount with respect to the optometry unit 5 of each eye based on the position information of the subject's eye, and based on the information, the control unit 70 determines the optometry unit 5 as the first measurement eye. XY movement is performed (preset). Thereby, the measurement optical axis L1 of the optometry unit 5 is positioned in the vicinity of the right eye of the subject's eye. As a result, the right eye of the subject can visually recognize the fixation target, and fixes the fixation target.

  When rough alignment in the XY directions is achieved, the alignment detection is switched to index detection by the two-dimensional imaging device 65, and the alignment index image projected on the subject's ocular cornea is detected, thereby detecting the optometry unit for the subject's eye. 5 alignment state is detected. At this time, since the Z direction of the optometry unit 5 is shifted in a direction away from the proper working distance, the alignment index image is detected while the optometry unit 5 is advanced with respect to the subject's eye. Further, the control unit 70 displays a high-magnification anterior ocular segment image by the image sensor 65 on the monitor 8 (see FIG. 6).

  Here, the control unit 70 sets the center position of the ring index R by the ring projection optical system 40 in the anterior segment image captured by the image sensor 65 as the corneal apex position M0, and the alignment displacement amount of the optometry unit 5 in the XY directions. Based on this, the Y drive unit 6 and the XZ drive unit 7 are driven and controlled to move the optometry unit 5 in the XY directions. Further, while the distance between the infinity index M on the cornea Ec by the working distance index projection optical system 41 hardly changes, the characteristic that the image interval in the predetermined meridian direction of the ring index R described above changes is utilized. Then, an alignment deviation amount in the working distance direction of the optometry unit 5 with respect to the subject's eye is obtained (refer to JP-A-6-46999 for details), and the control unit 70 drives the XZ drive unit 7 based on this amount. Control to move the optometry unit 5 in the Z direction. In this way, when the amount of alignment deviation in each direction of the optometry unit 5 with respect to the subject's eye reaches a predetermined allowable range, the alignment state of the optometry unit 5 with respect to the subject's eye is determined to be appropriate. Then, the control unit 70 issues a test start trigger signal and executes the test of the subject's eye by the operation of the test optical system 5b.

  When the measurement of the right eye is completed, the optometry unit 5 is moved in the XY directions so that the left eye is positioned in the vicinity of the measurement optical axis L1 based on the previously obtained distance information of the left and right eyes. After that, as in the case of the right eye, the Y drive unit 6 and the XZ drive unit 7 are driven and controlled based on the image signal from the image sensor 65, thereby completing precise alignment with the subject's eye and automatically measuring. Run it. For details of the control for imaging both eyes of the subject's eye and performing automatic alignment based on the imaging result, refer to Japanese Patent Laid-Open No. 10-216089.

  When the examination results of both eyes of the subject's eye are obtained as described above, the control unit 70 displays the measurement results on the monitor 8 and controls the drive of the Y drive unit 6 and the XZ drive unit 7. Then, the optometry unit 5 is returned to a predetermined origin position.

  In this way, when full auto alignment is performed on the subject's eye with the moving base 3 fixed by the driving mechanism 200, the optometric unit 5 and the subject (or face) that move over a wide range by the XZ driving unit 7 are used. It is possible to properly align the eyes of the subject with both eyes while avoiding contact with the support unit 10).

  Next, a case where the mode is switched from the full auto mode to the manual mode will be described. Here, the examiner selects the manual mode using the mode changeover switch 74a, and performs the switching operation from the full auto mode to the manual mode. Here, the control unit 70 drives the drive motor 201 based on the input of the switching signal to the manual mode by the mode switch 74a, and moves the lock arm 202 from the lock position to the retracted position. Then, the control unit 70 stops driving the drive motor 201 based on the detection signal output from the micro switch 204 and displays on the monitor 8 that the mode has been switched to the manual mode. When the manual mode is set, the control unit 70 displays a high-magnification anterior segment image acquired by the light receiving element 65 on the monitor 8.

  As a result, the fixation of the movable table 3 is released, and the movable table 3 can move horizontally with respect to the base 1, so that the examiner moves the movable table 3 using the joystick 4, and the subject's eyes Alignment of the optometry unit 5 is performed.

  Here, the examiner can select whether to set the first manual mode or the second manual mode with a predetermined mode selection switch provided in the control unit 74 (preset to any mode by parameter setting). It is also possible to adopt a configuration as described above). When the first manual mode is set, the control unit 70 prohibits the driving of the XZ driving unit 7 and fixes the optometry unit 5 to the moving table 3. When the second manual mode is set, the control unit 70 restricts the driving range of the XZ driving unit 7 and moves the optometry unit 5 only within a predetermined range based on the origin position.

  When the manual mode is set as described above, the examiner instructs the subject to place the chin on the chin rest 12 and has the chin rest 12 place the subject's chin. Here, the examiner adjusts the height of the chin rest 12 so that the height of the eye level marker 14 and the eye of the subject are substantially the same.

  Here, the examiner instructs the subject to fixate a fixation target (not shown), and performs alignment adjustment with respect to the subject's eye (for example, the right eye) using the joystick 4. In this case, when a clear subject eye image without blur appears on the monitor 8, the optometry unit for the subject eye so that the ring image R and the reticle mark LT displayed on the display monitor 8 are concentric circles. 5 is finely adjusted in the vertical and horizontal directions. Thereafter, the position of the optometry unit 5 in the working distance direction is finely adjusted with reference to an indicator (not shown) (or so that the ring image R becomes the thinnest). Then, when the alignment is completed and the measurement start switch 4b is pressed by the examiner, measurement by the optometry optical system 5b is performed (first manual mode). In the second manual mode, when the alignment index image is detected by the two-dimensional light receiving element 65, the control unit 70 determines the subject's eye from the position of the alignment index image received by the two-dimensional light receiving element 65. The alignment state of the optometry unit 5 is detected, and the Y drive unit 6 or the XZ drive unit 7 is drive-controlled based on the detection result. When the alignment is completed, a measurement start trigger is issued based on an alignment completion signal from the control unit 70 or a trigger signal from the measurement start switch 4b, and the eye of the subject is measured.

  When the measurement of the right eye is completed as described above, the examiner moves the moving table 3 in the left eye direction using the joystick 4, aligns the optometry unit 5 with respect to the left eye, and the left eye. Measure against.

  With the configuration described above, when shifting from the manual mode to the full auto mode, the operation of moving and locking the movable base 3 to a predetermined position on the base 1 set for the full auto mode is easily performed. Therefore, the labor of the examiner can be reduced.

  In the above description, a motor with a gear head is used as the drive motor 201, and both the movement of the movable table 3 to a predetermined position and the fixing of the movable table 3 at the predetermined position are combined. is not. In this case, a motor that does not have a gear head is used as the drive motor 201, the moving table 3 is moved to a predetermined position by the driving motor 201, and the moving table 3 is fixed at the predetermined position by another lock (fixing) mechanism (for example, , Japanese Patent Laid-Open No. 2005-224257). In this case, a detection signal when the arm (same configuration as the lock arm 202) is moved to the lock position by driving the drive motor 201 is acquired by the micro switch 205, and the detection result is displayed on the monitor 8. The examiner can lock the movable table 3 using a lock mechanism.

  In the above description, the drive motor 201 is fixed to the movable table 3 and the guide member 250 is fixed to the base 1. However, the guide member 250 is fixed to the lower portion of the movable table 3, and the base The drive motor 201 may be fixed to 1 (see FIG. 7).

  FIG. 7 is a view when the drive mechanism 200 is viewed from below. More specifically, it is a view when the movable base 3 is arranged on the right side with respect to the left and right central position C1 on the base 1. In this case, the guide member 250 is arranged so that the guide surface 251 faces the subject's eye.

  FIG. 7A is a view when the lock arm 202 is placed in the retracted position. Here, when the lock arm 202 placed at the retracted position is moved toward the lock position, the guide member 250 is pressed by the ball bearing 203, and the movable table 3 is moved backward in accordance with the change of the rotational position. The Further, when the ball bearing 203 approaches the recess 255 along the guide surface 251, the movable table 3 is moved to the left and right center position C1. Here, when the lock arm 202 reaches the lock position, the movable table 3 is moved to a predetermined position on the base 1. (Refer FIG.7 (b)).

  In the above description, the movable base 3 is moved to a predetermined position by rotating the lock arm 202 by driving the drive motor. However, the lock arm 202 is moved linearly by driving the drive motor ( The moving base 3 may be moved to a predetermined position by linear movement).

  FIG. 8 is a view when a mechanism for moving the lock arm 202 linearly is used, and is a view when the drive mechanism 200 is viewed from above. In FIG. 8, as shown in FIG. 2, the drive motor 201 is fixed to the movable table 3, and the guide member 250 is fixed to the base 1.

    Here, as shown in FIG. 8A, when the lock arm 202 placed at the retracted position is linearly moved in the E direction, the guide surface 251 is pressed from the lock arm 202, and the movable table 3 is moved to the linear movement position. It is moved backwards in response to changes. Further, when the ball bearing 203 approaches the recess 255 along the guide surface 251, the movable table 3 is moved to the left and right center position C1. Here, when the lock arm 202 reaches the lock position, the movable table 3 is moved to a predetermined position on the base 1. (See FIG. 8 (b)).

  In the above description, the moving base 3 is moved to a predetermined position on the base 1 by moving the lock arm 202 along the guide surface 251 formed on the guide member 250. A drive motor for horizontally moving the table, an arm connected to the drive motor and moved between the retracted position and the fixed position by driving the drive motor, and disposed opposite the arm and pressed by the tip of the arm A fixed member, and one of the drive motor and the fixed member is disposed on the base and the other is disposed on the movable base, and the movable base is moved to a predetermined position on the base by pressing the fixed member by moving the arm. However, the present invention is not limited to this as long as it is moved.

  FIG. 9 is a view showing a modification example of the drive mechanism for moving the movable table 3 to a predetermined position, and is a view when the drive mechanism is viewed from above. The drive unit 350 formed in the lower part of the moving table 3 includes a first drive motor 308, a second drive motor 318, a third drive motor 328, a first arm 310, a second arm 320, and a third arm 330. The first arm 310 is moved leftward by the drive of the first drive motor 308, the second arm 320 is moved forward by the drive of the second drive motor 318, and the third arm is driven by the drive of the third drive motor 328. 330 is moved to the right. A fixing member 315 facing the first arm 310, a fixing member 325 facing the second arm 320, and a fixing member 335 facing the third arm are fixed to the base 1.

  In addition, as shown to Fig.9 (a), when shifting from the state in which the fixed of the movable stand 3 was cancelled | released to the state in which the movable stand 3 was fixed to the predetermined position, the 1st drive motor 308 is driven and 1st drive motor 308 is driven. The first arm 310 is moved to the lock position, the second drive motor 318 is driven to move the second arm 320 to the lock position, and the third motor 328 is driven to move the third arm 335 to the lock position. do it. Thereby, the movable stand 3 is moved to a predetermined position on the base 1 and is in a locked state (see FIG. 9B).

  In the above description, the mode switching between the full auto mode and the manual mode is performed based on the input of the mode switching signal issued from the mode switching switch 74a operated by the examiner. As long as the mode switching signal is input by the above. For example, for switching from the manual mode to the full auto mode, the control unit 70 uses the input of the measurement completion signal for the left and right eyes automatically issued in the manual mode as the input of the mode switching signal, and based on this, the drive motor 201 It is good also as a setting which drives and automatically transfers to a full auto mode.

1 is a schematic external view of an ophthalmologic apparatus according to the present embodiment. It is a schematic block diagram explaining the sliding mechanism which moves a moving base horizontally with respect to a base by manual operation, and the drive mechanism which moves a moving base to the predetermined position on a base by electric drive. It is a figure explaining operation | movement of a drive mechanism, and is a figure when a drive mechanism is seen from upper direction. It is a schematic block diagram explaining the structure of the optical system and control system which were provided in the optometry part. It is an example when the anterior eye part image acquired by the 2nd imaging | photography optical system is displayed on the display monitor. It is an example when the anterior eye part image acquired by the 1st imaging optical system is displayed on the display monitor. It is a figure explaining the drive mechanism by which the guide member was fixed to the lower part of a movable stand, and the drive motor was fixed to the base. It is a figure at the time of using the mechanism which moves a lock arm linearly, and is a figure when a drive mechanism is seen from upper direction. It is a figure which shows the example of a change of the drive mechanism which moves a movable stand to a predetermined position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 3 Moving table 4 Joystick 7 XZ drive part 70 Control part 74a Mode changeover switch 200 Drive mechanism 201 Drive motor 201a Gear head 202 Lock arm 250 Guide member 251 Guide surface 315, 325, 335 Fixed member 350 Drive unit

Claims (4)

In an ophthalmologic apparatus for examining or measuring a subject's eye,
A moving table that is mechanically horizontally movable on the base by operation of the control member;
An optometry unit arranged to be horizontally movable on the movable table by driving the first electric mechanism unit;
Fixing means for fixing the movable table to the base;
An auto-alignment mode in which alignment with respect to a subject's eye is performed by driving the first electric drive mechanism unit in a state where the moving table is fixed at a predetermined position on the base by the fixing means, and fixing of the moving table A mode switching means for switching between a manual alignment mode for performing alignment with respect to the subject's eye by operating the steering member in a state in which is released.
Drive control means for moving the moving table to the predetermined position by driving a second electric mechanism unit based on an input of a switching signal from the manual alignment mode to the auto alignment mode by the mode switching means. Ophthalmic equipment. The ophthalmic device according to claim 1.
The second electric mechanism section includes a drive motor for horizontally moving the movable table, an arm connected to the drive motor and moved by driving the drive motor, and disposed opposite the arm. A fixing member pressed by a tip, and one of the drive motor and the fixing member is arranged on the base and the other is arranged on a moving table, and the fixing member is pressed by movement of the arm. To move the moving table to a predetermined position on a base. 3. The ophthalmologic apparatus according to claim 2, wherein a guide surface that guides movement of the arm is formed on the fixing member, and the arm is moved along the guide surface in the second electric mechanism unit. To move the moving table to a predetermined position on the base. 4. The ophthalmologic apparatus according to claim 3, wherein the drive motor is a drive motor having a gear head mechanism, and the second electric mechanism unit also serves as the fixing means.