JP2010200905A - Ophthalmic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ophthalmic apparatus in which an examined eye and the apparatus can be easily aligned in position for performing the examination smoothly. <P>SOLUTION: The ophthalmic apparatus having an examination unit having an optical observation system for observing the front of the examined eye and an optical examination system for examining the eye, a Y driving means for moving the examination unit vertically to the eye, a forehead rest, and a chin rest mounted to be moved vertically, includes: view target sections mounted left and right sides across a light axis at almost the same height as the light axis of the optical examination system; a restricting member for restricting the vertical visible area where the eye can recognize the eye target, within the area determined by the relationship with the optical observation system, having a shape capable of recognizing the view target by the eye with a predetermined eye width of the left and right area; a control means for controlling the Y driving means to position the examination unit at the predetermined height; and a chin rest moving means for raising the chin rest to the chin position of the examined person after the examined person puts the forehead on the forehead rest and the height position of the eye is adjusted in order that the examined person can recognize the view target by himself or herself. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ophthalmologic apparatus that performs examination of a subject's eye (including measurement of eye characteristics, imaging, and the like) after aligning the subject's eye and the device.

  In ophthalmologic apparatuses such as an ocular refractive power measurement device, a non-contact tonometer, and a fundus camera, the subject's forehead is brought into contact with the forehead support member, and the subject's jaw is moved by a jaw holder configured to be movable up and down. After the fixation, the alignment of the inspection unit in which the inspection optical system is arranged with respect to the subject's eye is performed (for example, see Patent Documents 1 and 2). The examiner observes an enlarged image of the anterior segment displayed on the display, and moves the examination unit in the left-right direction, the up-down direction, and the front-rear direction by operating a joystick or the like, and positions the subject eye and the examination unit. Align.

Japanese Patent Laid-Open No. 11-276436 JP 2004-174155 A

  Since the height position of the eye from the subject's jaw varies greatly depending on the subject, the examiner confirms the height of the subject's eye for each subject and adjusts the height of the chin rest. When examining a new subject eye, the height of the chin rest remains at the height used by the previous subject or an appropriate height without checking the subject eye height. When the examiner moves the inspection unit upward or downward, the inspection unit may reach the limit of the range in which the inspection unit can move up and down. In this case, it becomes necessary to adjust the height of the chin rest again, and time is required for the inspection. If the range in which the inspection unit can be moved up and down is increased, the apparatus becomes larger and disadvantageous in terms of cost.

  In addition, the examiner moves the examination unit so that the anterior segment image captured by the observation optical system is displayed on the display, but if the positional relationship between the subject eye and the examination unit is not confirmed, the examination is performed. An examiner who is unfamiliar with the inspection often takes time to align the unit, wondering whether to move the unit upward or downward. In particular, when the ophthalmologic apparatus is used in a dark room, it is not easy for the examiner to confirm the height of the subject's eyes.

  In view of the above-described problems of the prior art, it is an object of the present invention to provide an ophthalmologic apparatus that can easily align a subject's eye and the apparatus and can perform an examination smoothly.

In order to solve the above problems, the present invention is characterized by having the following configuration.
(1) Movement including a Y-direction drive unit that moves an inspection unit in which an observation optical system for observing the anterior eye portion of the subject and an inspection optical system for inspecting the eye are vertically moved with respect to the subject's eye In an ophthalmologic apparatus comprising means, a forehead support member fixed at a predetermined position, and a chin rest arranged to be movable in the vertical direction, a target part having a target to be visually recognized by a subject's eye A visual target portion disposed on at least one of the right and left sides of the inspection optical system at substantially the same height as the optical axis of the inspection optical system on the subject side of the inspection unit, and the inspection unit When the subject is placed in a predetermined position in the direction and the subject holds the forehead on the forehead support member, the observation optical system observes the range in the vertical direction in which the subject's eye can visually recognize the target. It has a shape that is limited to a predetermined range defined in relation to the range. A limiting member having a shape that allows a subject's eye having a predetermined eye width range in the left-right direction to visually recognize the target, and a predetermined member disposed in the target unit, and a predetermined initial A driving control means for controlling the driving of the Y-direction driving means based on the input of the digitizing signal, and positioning the inspection unit at a predetermined height; Chin rest moving means for raising the chin rest lowered downward to the position of the subject's chin after the subject adjusts the height position of the eye so that the target can be visually recognized. It is characterized by providing.
(2) In the ophthalmologic apparatus according to (1), a predetermined range in the vertical direction restricted by the restriction member is included in a movable range of the inspection unit moved by the Y-direction driving unit. .
(3) In the ophthalmologic apparatus according to (1) or (2), the chin rest moving means moves the chin rest in a vertical direction by a drive source, and the drive source based on the input of the initialization signal. A chin rest that raises the chin rest by controlling the drive of the driving source based on an input of a movement signal for moving the chin rest while controlling the driving of the chin rest to a lower retreat position And a control means.
(4) The ophthalmic apparatus according to (3) includes a sensor disposed on the chin rest, the sensor for detecting contact or proximity to the subject's chin by raising the chin rest, and the chin rest control means. Is configured to control the driving of the driving source based on a signal input for moving the chin rest and raise the chin rest, and then stop the raising of the chin rest based on a detection signal of the sensor. To do.
(5) In the ophthalmic apparatus according to (4), a light source that emits visible light arranged as a target of the target unit, and a light source control unit that controls light emission of the light source, the input of the initialization signal The light source is turned on based on the detection signal of the sensor, based on the input of a movement signal from the chin rest moving means, or based on a predetermined signal input for starting the alignment between the eye and the inspection unit Or a light source control means for turning off the light source based on any one of the signal inputs.
(6) In the ophthalmologic apparatus according to (1) or (2), a light source that emits visible light arranged as a target of the target unit, and a light source control unit that controls light emission of the light source, the initial stage Light source control means for turning on the light source based on an input of an activation signal, and turning off the light source based on an input of a movement signal from the chin rest moving means or a predetermined signal input for starting alignment. And

  ADVANTAGE OF THE INVENTION According to this invention, position alignment with a test subject's eye and an apparatus can be performed easily, and a test | inspection can be performed smoothly. Moreover, the height adjustment of the chin rest according to the subject can be easily performed without causing an increase in the size of the apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic external view of an ophthalmic apparatus 100 according to the present embodiment, and FIG. 2 is a configuration diagram of a moving mechanism of the ophthalmic apparatus.

  The base 1 of the ophthalmologic apparatus 100 is provided with a face support unit 10 that fixes the face of the subject. The face support unit 10 has a support base 11 fixed to the base 1, and a chin rest 12 on which the subject's chin is placed is provided on the support base 11 so as to be vertically movable. Further, an inverted U-shaped forehead support column 13 to which a forehead support member 14 for contacting the forehead of the subject is attached is fixed to the support base 11. The forehead support column 13 is provided with an eye level mark 15 that serves as a guide for adjusting the height of the eye of the subject.

  On the base 1, a movable table 3 on which an inspection unit 5 is mounted is provided so as to be slidable in the front-rear direction (Z direction) and the left-right direction (X direction) with respect to the subject's eye. The movable table 3 is slid on the base 1 when the joystick 4 is tilted. Further, inside the movable table 3, a Y drive unit 6 that moves the inspection unit 5 in the vertical direction (Y direction), and XZ that moves the inspection unit 5 in the left-right direction (X direction) and the front-back direction (Z direction). A drive unit 7 is mounted. The Y drive unit 6 and the XZ drive unit 7 are configured by a known moving mechanism including a motor and a slide mechanism. The Y drive unit 6 and the XZ drive unit 7 enable the inspection unit 5 to move in a three-dimensional (XYZ) direction with respect to the subject's eye.

  The joystick 4 is provided with a rotary knob 4a for inputting a movement signal for moving the inspection unit 5 in the vertical direction (Y direction). On the examiner side of the movable table 3, a display 8 is provided on which an anterior segment image of the subject photographed by the observation optical system 60 (see FIG. 4) disposed in the examination unit 5 is displayed. When a measurement start switch 4b provided on the top of the joystick 4 is pressed, a trigger signal for starting measurement or photographing by the optometry optical system is generated. The moving table 3 includes a switch 9a for automatically starting the upward movement of the chin rest 12 and a switch 9b (UP / DOWN switch) for the examiner to manually move the chin rest 12 up and down. And are provided.

  In this embodiment, the movable table 3 on which the inspection unit 5 is mounted is slid in the XZ direction. However, the inspection unit 5 is moved only in the XZ direction by the XZ drive unit 7. May be. In this case, the joystick 4 is configured to input a signal for moving the inspection unit 5 in the X direction and the Z direction.

  FIG. 3 is a schematic cross-sectional view showing a configuration of a chin rest moving mechanism 20 that electrically moves the chin rest 12 up and down. The chin rest moving mechanism 20 includes a pulse motor 24 as a drive source for moving the chin rest in the vertical direction. A feed screw 21 is erected on the support base 11, and a support 23 having a female screw threadably engaged with the feed screw 21 is guided by the support base 11 and attached to be movable up and down. The chin rest 12 is fixed on the column 23. A gear 22 is provided below the feed screw 21. The gear 22 is meshed with a gear on the pulse motor 24 side. Further, a groove 25 is formed in the support column 23. The groove 23 and the rotation-preventing screw 26 prevent the column 23 from rotating. The feed screw 21 is rotated by the rotation of the motor 24, whereby the chin rest 12 is moved up and down together with the column 23. A light shielding plate 27 is attached below the column 23, and a photo sensor 28 for detecting the light shielding plate 27 is provided on the support base 20 side. The photo sensor 28 detects that the chin rest 12 has been lowered to the lower limit by detecting the light shielding plate 27.

  A sensor 29 is provided on the upper surface of the chin rest 12 to detect that the subject's chin is in contact with or close to the upper surface of the chin rest 12. As the sensor 29, a touch sensor that senses pressure is used, and it is detected that the subject's chin has come into contact. Further, as the sensor 29, a proximity sensor that detects that an object has approached a distance of about 1 mm is used. As the proximity sensor, a known sensor such as a photoelectric sensor that performs position detection based on the magnitude of the output of the received reflected light can be used.

  FIG. 4 is a schematic configuration diagram illustrating the configuration of the optical system and the control system provided in the inspection unit 5. An objective lens 51, a beam splitter 52, and an inspection optical system 30 are arranged on the inspection optical axis L1. The inspection optical system 30 is, for example, a known eye refractive power measurement optical system. The eye refractive power measurement optical system includes a projection optical system that projects measurement light from a measurement light source onto the fundus of a subject's eye, and a light receiving optical system that receives reflected light from the fundus onto a light receiving element. The refractive power of the subject's eye is measured on the basis of the fundus reflection light received by. In the case of a fundus camera, the inspection optical system 30 includes a fundus illumination optical system and a fundus photographing optical system. The inspection optical system 30 also includes a fixation target presenting optical system that stabilizes the visual axis of the subject's eye.

  Further, in the inspection unit 5, a ring index projection optical system 40 that emits near-infrared light for projecting a ring index onto the cornea of the subject's eye, and a subject by projecting an infinity index onto the cornea A working distance index projection optical system 41 that emits near-infrared light for detecting an alignment state in the working distance direction with respect to the eye is disposed symmetrically about the optical axis L1. The ring projection optical system 40 is also used as anterior segment illumination for illuminating the anterior segment of the eye E.

  The observation optical system 60 for observing the anterior segment of the eye to be inspected shares the objective lens 51 of the inspection optical system 30, and includes a relay lens 61, a total reflection mirror 62, a diaphragm 63, and an imaging device arranged in the reflection direction of the beam splitter 52. It has a lens 64 and a two-dimensional image sensor 65. The observation optical axis of the observation optical system 60 is coaxial with the optical axis L1 of the inspection optical system 30. As shown in FIG. 7, the anterior segment of the eye to be examined is imaged at a high magnification by the imaging element 65. Further, the image sensor 65 detects the alignment index image projected onto the eye cornea by the index projection optical systems 40 and 41. The anterior segment image of the subject imaged by the imaging element 65 is displayed on the display 8.

  The control unit 70 includes a Y drive unit 6, an XZ drive unit 7, a display 8, a switch 9a, a switch 9b, a rotation knob 4a, a measurement start switch 4b, a motor 24 of the chin rest moving mechanism 20, a photo sensor 28, a sensor 29, The imaging element 65, the inspection optical system 30, the light source 54 of the guide target unit 52, which will be described later, the switch unit 72 on which various switches are arranged, and the like are connected. The control unit 70 controls the operation of each light source, each drive unit, and the display 8. The switch unit 72 includes an alignment mode selection switch (a switch for selecting the manual alignment mode and the auto alignment mode), a print switch for printing out the inspection result from the printer, a reset switch for inputting a signal for resetting the operation of the apparatus, and the like. Is arranged.

  1 and 2, an inspection window 51 through which the optical axes of the inspection optical system 30 and the observation optical system 60 pass is provided on the subject side of the inspection unit 5. In addition, on the left and right sides of the examination window 51, there are two guidance target parts 52 on which targets for guiding the subject's eyes to the height position of the examination window 51 are arranged. The guide visual target parts 52 are substantially the same height as the inspection optical axis L1, and are provided on both the left and right sides of the inspection optical axis L1. Note that, in an apparatus that examines both the left and right eyes, the guide target unit 52 may be disposed on at least one of the left and right sides.

  5 and 6 are explanatory views of the configuration of the guide target unit 52. FIG. FIG. 5 is an AA cross-sectional view (longitudinal cross-sectional view) of the inspection unit 5 including one guide target portion 52. FIG. 6 is a BB cross-sectional view (cross-sectional view in the horizontal direction) of the inspection unit 5 including the guide target part 52. The guide target 52 includes a light source 54 that emits visible light as a target to be visually recognized by the subject's eye, and a limiting member 53 that limits a range in which the subject can visually recognize the light source 54 (target). Composed. For example, green light is emitted from the light source 54. In this apparatus, the light source 54 is disposed so as to be located behind the housing surface on the subject's eye side of the inspection unit 5, and the restricting member 53 is a horizontally long cylindrical shape so as to form a groove in which the light source 54 is disposed. Is formed. The range in the up and down direction and the left and right direction in which the light emitted from the light source 54 travels is limited by the wall surface on the front end side of the limiting member 53.

  The setting of the range limited by the limiting member 53 will be described. 5 and 6, the movable table 3 is positioned closest to the examiner in the Z direction, and the inspection unit 5 is located at a predetermined initial position with respect to the movable table 3 (for example, the inspection unit 5 is positioned closest to the examiner). It is the figure which showed the state put on. Under this condition, when the subject abuts the forehead on the forehead support member 14, the distance in the Z direction between the subject's eye and the inspection unit 5 is defined as W. When the light in the vertical direction emitted from the light source 54 is limited within the range of the angle θ1 by the limiting member 53, the subject eye is positioned in the vertical range DY in which the range of the angle θ1 is determined by the distance W. The subject's eye can see the light source 54 directly. This range DY is preferably set in relation to the upper and lower ranges imaged by the imaging element 65 of the observation optical system 60. For example, the range is 20 mm (± 10 mm) with the inspection optical axis L1 as the center, and at least a part of the eye is set within the range imaged by the imaging element 65 of the observation optical system 60. If the eye is located in the range DY at the start of alignment, when the inspection unit 5 is moved in the left-right direction, at least a part of the anterior segment image in the vertical direction appears on the display 8. Confirms the subject's eyes and can determine in which direction the inspection unit 5 should be moved in the vertical direction without hesitation. As shown in FIG. 2, the movable range DA in the Y direction of the inspection unit 5 is set to include the range DY. As a result, the inspection unit 5 can follow the position of the subject's eye without reaching the movement limit.

  In FIG. 6, it is assumed that the light in the left-right direction emitted from the light source 54 is restricted by the angle θ2 in a state where the inspection unit 5 is located at a predetermined position at a distance W with respect to the eye. The range in the left-right direction in which the subject's eyes can directly see the light source 54 when the subject abuts the forehead against the forehead support member 14 within the range of this angle θ2 is defined as DX. The range DX for the left and right eyes is set wider than the range DY in the vertical direction in consideration of individual differences in the left and right eye width (distance between pupils) PD of the subject's eyes. The range DX is set so that a subject having an eye width (interpupillary distance) PD in a range of at least 40 to 80 mm can be confirmed using the light source 54 as a visual target.

  In addition, instead of the light source 54 of the guide target 52, a target mark (target) that is clearly distinguished from the inspection window 51 of the inspection unit 5 and the like and is focused in the restriction member 53 of the guide target 52 is shown. It may be formed. For example, it may be formed as a green circular mark. However, a light source 54 that emits light is preferably used. In particular, the ophthalmologic apparatus is often used in a dark room. If the light source 54 emits light, the subject can easily visually recognize the target of the guidance target 52 even in the dark room.

  In the apparatus having the above-described configuration, the alignment between the subject's eye and the inspection unit 5 will be mainly described. First, when a power switch (not shown), a print switch or a reset switch indicating completion of the examination of the subject's eye is pressed, these switch signals are input as initialization signals for conducting a new examination of the subject. Is done. When these predetermined initialization signals are input, the control unit 70 controls the driving of the Y driving unit 6 and the XZ driving unit 7 and moves the inspection unit 5 to a preset reference position (initial position). . The reference position in the X direction of the inspection unit 5 is set to a position where the inspection optical axis L1 is placed in the center of the left and right, and the reference position in the Z direction of the inspection unit 5 is set to the rearmost position on the examiner side. . The reference position in the Y direction of the inspection unit 5 is such that the inspection optical axis L1 is substantially the same height as the position of the eye level mark 15 of the forehead support column 13, and is at the center position of the movable range in the vertical direction of the inspection unit 5. Is set. In FIG. 2, the inspection unit 5 is placed at a reference position, and the inspection optical axis L <b> 1 is located at a distance HS from the upper surface of the base 1. At this time, the possible range DA in the Y direction of the inspection unit 5 is set to a range wider than the range DY in which the subject's eye can directly see the light source 54 by the guidance target unit 52.

  When an initialization signal such as a reset switch is input, the motor 24 is driven by the control unit 70 to move the chin rest 12 to the lowest position in order to prepare for the examination of a new subject. The light source 54 of the guidance target 52 is turned on.

  During the examination, the examiner himself / herself is able to directly confirm the light sources 54 of the two guidance target portions 52 with the subject's forehead in contact with the forehead support member 14. To move up and down. If the examiner is not accompanied, an audio guide may be generated by pressing a predetermined inspection preparation start switch.

  When the subject moves the position of the face up and down so that the light source 54 of the guidance target 52 can be seen, the eye position of the subject is within the range DY around the inspection optical axis of the inspection unit 5. Will come to be located. When the ophthalmic apparatus is placed in a dark room, if the light source 54 that emits green light is used, the opening of the restricting member 53 of the guidance target 52 is illuminated by the light source 54, so that the subject is restricted. The position of the opening of the member 53 can be confirmed without hesitation. The subject can see the light source 54 as a visual target by moving his / her face up and down.

  The examiner confirms that the subject can see the light source 54 of the guidance target 52, and then presses the switch 9a to raise the chin rest 12. When receiving the signal from the switch 9a, the control unit 70 drives the motor 24 of the chin rest moving mechanism 20 to move the chin rest 12 located at the lowest position upward. When the sensor 29 detects that the chin rest 12 is in contact with the subject's chin or is close to a predetermined distance, the control unit 70 stops the movement of the chin rest 12. Thereby, a subject's jaw is fixed. In addition, when the jaw position is detected by the sensor 29, the control unit 70 turns off the light source 54 of the guidance target unit 52. By turning off the light source 54 before starting the inspection, it is possible to prevent the light flux from the guidance target 52 from interfering with measurement or observation, particularly in the case of measurement in a dark room.

  Although the case where the chin rest 12 is automatically moved and stopped by the switch 9a and the sensor 29 is described here, the examiner manually adjusts the height position of the chin rest 12 by operating the switch 9b. You may make it do. Further, as a signal for turning off the light source 54, a detection signal of the sensor 29 may be used, or a jaw holder movement signal or a stop signal by the switch 9a or the switch 9b may be used. Alternatively, an input signal of the rotary knob 4a for moving the inspection unit 5 in the Y direction can be used as an alignment start signal, and this can be used as a light extinction signal for the light source 54. The alignment start signal includes a configuration using a dedicated switch signal provided in the switch unit 72.

  After the subject's chin is fixed to the chin rest 12, for example, in order to examine the right eye of the subject, the examiner operates the joystick 4 to move the examination unit 5 together with the movable table 3 to the subject. Move to the right eye side. When the inspection unit 5 is moved to the right eye side, an anterior segment image is captured by the imaging element 65 of the observation optical system 60 of the inspection unit 5, and the anterior segment image appears on the display 8. At this time, the imaging element 65 captures a high-magnification anterior segment image, but the height direction of the subject's eye is located in the range DY with the inspection optical axis L1 as the center, so the inspection unit 5 Even if is not moved significantly in the vertical direction, at least a part of the anterior segment image EM appears on the display 8 as shown in FIG. Further, since the position of the inspection unit 5 in the vertical direction (Y direction) is placed at the reference position and the height of the eye of the subject is guided by the guidance target 52, the movement limit of the inspection unit 5 in the Y direction is Thus, the eye of the subject and the inspection unit 5 can be aligned only by movement of the inspection unit 5 in the Y direction without reaching immediately. Further, it is not necessary to increase the movement range of the inspection unit 5 in the Y direction, and the apparatus can be prevented from being enlarged. In FIG. 7A, a reticle mark LT is electrically displayed at the center of the screen of the display 8.

  If the examiner can confirm the anterior segment image EM of the subject's eye on the display 8, the examiner further moves the inspection unit 5 in the XYZ directions to perform precise alignment. The examiner operates the joystick 4 to move the inspection unit 5 (moving table 3) in the X direction so that the center of the anterior segment image EM is directed to the reticle mark LT, and operates the rotary knob 4a to perform the inspection. The unit 5 is moved in the Y direction. When the anterior ocular segment image EM approaches the reticle mark LT, as shown in FIG. 7B, the ring image R formed on the cornea is imaged by the imaging element 65 by the ring index projection optical system 40, and the display 8 Will appear on the screen.

  When the manual alignment mode is selected by the alignment mode switch, the examiner moves the inspection unit 5 by operating the joystick 4 and the rotary knob 4a so that the center of the ring image R coincides with the center of the reticle mark LT. Move in XY direction. Further, the inspection unit 5 is moved in the Z direction by operating the joystick 4 so that the ring image R is in focus.

  When the auto alignment mode is selected by the alignment mode switch, the alignment state in the XY directions is detected based on the ring image R detected by the image sensor 65. Based on the detection result of the alignment state in the XY directions, the drive of the Y drive unit 6 and the XZ drive unit 7 is controlled by the control unit 70 so that the center of the ring image R and the center of the reticle LT are within a predetermined allowable range. In addition, the inspection unit 5 is moved in the XY directions. If the index image M formed by the working distance index projection optical system 41 is detected by the image sensor 65, the alignment state in the Z direction is detected based on the index image M and the ring image R. Then, based on the detection result of the alignment state in the Z direction, the control unit 70 controls the driving of the XZ drive unit 7, and the inspection unit 5 moves in the Z direction so that the alignment state in the Z direction falls within a predetermined allowable range. Is done. Thereby, precise alignment is completed.

  When the switch 4b is pressed after completion of precise alignment (or when a trigger signal for starting measurement is automatically input based on the alignment completion signal), measurement is performed by the inspection optical system 30.

  After the completion of the right eye examination, the examiner moves the movable table 3 in the direction of the left eye by operating the joystick 4 in order to inspect the other eye (left eye). At this time, the position of the left eye in the Y direction may be slightly changed with respect to the right eye, but the height of the eye of the subject is guided by the guide target unit 52 in the initial stage of the examination. Therefore, alignment can be performed by moving the inspection unit 5 in the Y direction without the inspection unit 5 reaching the movement limit in the Y direction. Since there is no need to adjust the chin rest 12 again, smooth inspection can be performed without reducing inspection efficiency.

1 is a schematic external view of an ophthalmologic apparatus. It is a block diagram of the moving mechanism of an ophthalmologic apparatus. It is a schematic sectional drawing of a chin rest moving mechanism. It is a schematic block diagram of an optical system and a control system. It is explanatory drawing of a structure of a guidance target part. It is explanatory drawing of a structure of a guidance target part. It is explanatory drawing of the anterior ocular segment image displayed on the display.

DESCRIPTION OF SYMBOLS 5 Inspection unit 6 Y drive part 7 XZ drive part 12 Jaw holder 14 Forehead support member 20 Jaw holder moving mechanism 24 Pulse motor 29 Sensor 30 Inspection optical system 52 Guide target part 53 Restriction member 54 Light source 60 Observation optical system 70 Control part 100 Ophthalmic equipment

Claims (6)

A moving means including a Y-direction driving means for moving an inspection unit in which an observation optical system for observing the anterior segment of the subject and an inspection optical system for inspecting the eye are vertically moved with respect to the subject's eye; In an ophthalmologic apparatus comprising a forehead support member fixed at a predetermined position and a chin rest that is movably arranged in the vertical direction,
A target part having a visual target to be visually recognized by a subject's eye, on both the right and left sides of the inspection optical system at substantially the same height as the optical axis of the inspection optical system on the subject side of the inspection unit A target part disposed on at least one of
When the inspection unit is placed at a predetermined position in the front-rear direction, and the subject is in a state of placing a forehead on the forehead support member, a range in the up-down direction in which the subject eye can visually recognize the target A shape that restricts the predetermined range determined in relation to the observation range by the observation optical system and allows the subject's eye having a predetermined eye width range to visually recognize the visual target. A limiting member having a limiting member disposed on the visual target portion;
Drive control means for controlling the drive of the Y-direction drive means based on the input of a predetermined initialization signal, and for positioning the inspection unit at a predetermined height;
After the subject places his / her forehead on the forehead support member and adjusts the height of the eye so that the subject can visually recognize the target of the target part, the subject receives the jaw holder that has been lowered downward. Chin rest moving means for raising to the position of the examiner's chin,
An ophthalmologic apparatus comprising: The ophthalmologic apparatus according to claim 1, wherein a predetermined range in the vertical direction restricted by the restricting member is included in a movable range of the examination unit moved by the Y-direction driving unit. The ophthalmic apparatus according to claim 1 or 2, wherein the chin rest moving means moves the chin rest in a vertical direction by a drive source;
Based on the input of the initialization signal, the drive of the drive source is controlled so that the chin rest is positioned at the lower retracted position, and the drive source is controlled based on the input of the movement signal for moving the chin rest. Chin rest control means for controlling the drive to raise the chin rest;
An ophthalmologic apparatus comprising: The ophthalmologic apparatus according to claim 3 is a sensor disposed on the chin rest, the sensor comprising a sensor for detecting contact or proximity to the subject's chin by raising the chin rest,
The chin rest control means controls the drive of the driving source based on a signal input for moving the chin rest and raises the chin rest, and then stops the raising of the chin rest based on a detection signal of the sensor. An ophthalmologic apparatus characterized in that The ophthalmic device according to claim 4.
A light source that emits visible light arranged as a target of the target unit;
Light source control means for controlling light emission of the light source, wherein the light source is turned on based on the input of the initialization signal, and based on a detection signal of the sensor or input of a movement signal from the chin rest moving means Light source control means for turning off the light source based on any signal input based on or based on a predetermined signal input of alignment start of the eye and the inspection unit,
An ophthalmologic apparatus comprising: The ophthalmic apparatus according to claim 1 or 2,
A light source that emits visible light arranged as a target of the target unit;
Light source control means for controlling light emission of the light source, wherein the light source is turned on based on the input of the initialization signal, and based on a movement signal input from the chin rest moving means or a predetermined signal input for starting alignment Light source control means for turning off the light source,
An ophthalmologic apparatus comprising:

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