JPH0898808A - Ophthalmological device - Google Patents

Abstract

PURPOSE: To easily perform alignment with high accuracy without applying burden on an operator by performing the alignment, by driving and controlling a second moving means which moves a test means based on the result of a barometer test means. CONSTITUTION: Automatic alignment is performed by operating an X directional driving system 114, a Y directional driving system 113 and a Z directional driving system 115 by output signals from a two-dimensional detecting element 37 and a one-dimensional detecting element 53 by a control circuit 112. Judging that each barometer image goes in a prescribed allowable range, the control circuit 112, stops the operation of each driving system, and executes measurement as issuing a measurement start signal. Also, when it is detected that the barometer image reaches a moving limit by X, Y and Z moving limit detecting systems 116-118 as being outside the allowable range, the control circuit 112 displays an instruction mark in a direction where it reaches the moving limit on a TV monitor, and informs the inspector of a moving direction. When the moving limit is released by the visual adjustment of alignment by the inspector, the automatic alignment is operated again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus, and more particularly, to an alignment mechanism for aligning the apparatus with a predetermined positional relationship with an eye to be examined.

[0002]

2. Description of the Related Art An ophthalmologic apparatus for performing inspections, measurements and the like is provided with an alignment mechanism for aligning a measurement system of the apparatus with a predetermined positional relationship with an eye to be examined. The alignment mechanism of the conventional ophthalmologic apparatus is composed of an alignment index forming means, an observing means for observing the anterior segment of the eye, and an alignment reticle forming means to be superimposed on the anterior segment image,
Alignment is performed by a measurer operating a joystick or the like to move the device with respect to the base so that the eye to be inspected and the device have a predetermined positional relationship.

[0003]

The alignment mechanism as described above has the advantage that the mechanism is relatively simple and the operation is simple. However, in a device that requires particularly precise alignment, such as a non-contact tonometer,
There is a problem in that it requires a delicate operation, and it takes time for those who are unfamiliar with the operation, and it is difficult to perform accurate alignment.

The present invention has been devised in view of the above-mentioned drawbacks, and an object of the present invention is to provide an ophthalmologic apparatus capable of easily and accurately performing alignment without burdening an operator. To do.

[0005]

In order to solve the above problems, the present invention is characterized by having the following configuration. (1) In an ophthalmologic apparatus that has an inspection unit for inspecting the eye to be inspected, aligns the inspection unit to the eye to be inspected in a predetermined positional relationship, and activates the inspection unit, the eye to be inspected by an operator's operation. The moving means for moving the inspection means, the index forming means for forming the alignment index on the eye to be examined, the index detecting means for detecting the alignment index, and the detected alignment index for the inspection means. On the other hand, determination means for determining whether or not it is within a predetermined range,
The second moving means for further moving the inspection means with respect to the moving position by the first moving means, and the second moving means as the result of the index detecting means when the judging means is within a predetermined range. And a control unit that performs drive control based on the alignment.

(2) The ophthalmologic apparatus of (1) is characterized in that it has a suppressing means for suppressing the operation of the first moving means when it is judged by the judging means to be within a predetermined range. .

(3) In the ophthalmologic apparatus of (2), the movement limit detecting means for detecting that the movement of the inspection means by the second moving means has reached the limit, and the movement limit detecting means for the movement limit. When it is detected, the inspector is provided with an informing means for informing the inspector of the direction in which the first moving means is operated.

(4) The second moving means of (1) is characterized in that it has at least a driving means for moving in the vertical and horizontal directions.

(5) The ophthalmologic apparatus of (1) has an observation means for observing the anterior segment image of the eye to be inspected, and superimposes it on the anterior segment image to inform the direction of movement by the first moving means. It is characterized by having an optotype forming means for forming an index.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. [Exterior Configuration] FIG. 1 is a front view of a non-contact tonometer according to an embodiment as seen from the examiner side, and FIG. 2 is a side view including a partially transparent view. Reference numeral 1 is a base, and a base 2 on which a jaw base 2 for fixing an eye to be inspected is fixed. Reference numeral 3 is a main body that moves back and forth, right and left on the horizontal plane of the base 1. The main body 3 is moved by operating a joystick 4 having a mechanism described later. Reference numeral 5 denotes a measurement unit that houses a measurement system and an optical system (described later). The measurement unit 5 moves up and down with respect to the main body unit 3 when an examiner operates a rotary knob 4a provided on the joystick 4. To do. Furthermore, the measuring unit 5 can move about 5 mm to the left and right (14 mm up and down) and about 5 mm in the front direction from the front and rear reference positions (hereinafter referred to as origin positions) for automatic alignment. A TV monitor 6 displays the anterior ocular segment of the eye to be observed for observation, and also displays notification information such as alignment information and measurement results to the examiner.

[Structure of each part] Next, the structure of the main elements of the present apparatus will be described with reference to an alignment optical system, a joystick mechanism,
The left and right eye / rear position detection mechanisms for returning the measurement unit 5 to the origin position and the control system will be described separately. Note that the non-contact tonometer deforms the cornea by injecting compressed air to the cornea of the eye to be detected, detects that the cornea has been deformed to a predetermined state, and directly or the air pressure when the cornea is deformed to a predetermined state. The pressure is detected indirectly, and the intraocular pressure of the eye to be inspected is measured based on the air pressure at that time. However, since this measuring mechanism itself has little relation to the present invention, Japanese Patent Application No. 3-29415 filed by the applicant of the present invention. The description of (Title of the invention non-contact tonometer) is incorporated.

<Alignment Optical System> FIG. 3 is a view of the alignment optical system of the apparatus of the embodiment as seen from above. The alignment optical system will be described separately for the observation optical system, the reticle projection optical system, the front index projection optical system, the front index detection optical system, the distance target projection optical system, and the distance target detection optical system.

(Observation optical system) 10 is an observation optical system, and L indicates its optical axis. A nozzle 11 for blowing a gas for corneal deformation is arranged on the optical path of the observation optical system, and its axis and optical axis L
Is consistent with. A half mirror 12, an objective lens 13, a filter 14, a half mirror 15, a TV are arranged on the optical axis L.
A camera 16 is arranged. The filter 14 has a characteristic of transmitting the wavelength of the light flux of the front index projection optical system, which will be described later, and not transmitting the wavelength of the light flux of the distance index projection optical system, and is unnecessary for the detection elements of the TV camera 16 and the front index detection optical system. Prevents noise light from reaching. Reference numeral 17 denotes an illumination light source for observing an eye to be inspected, which emits near infrared light. The anterior ocular segment image of the eye E to be inspected illuminated by turning on the illumination light source 17 is formed on the image pickup surface of the TV camera 16 by the objective lens 13 via the Hough mirror 12, the filter 14, and the Hah mirror 15. Then
It is displayed on the TV monitor 6.

(Reticle projection optical system) 20 represents a reticle projection optical system, and the reticle projection optical system 20 includes a light source 21,
It is composed of a reticle plate 22 on which an annular mark is formed, and a projection lens 23. The reticle of the reticle plate 22 illuminated by the light source 21 is imaged on the image pickup device of the TV camera 16 by the projection lens 23 via the half mirror 15, and is projected on the TV monitor 6 so as to overlap with the anterior segment image. Be done.

(Front index projection optical system) 30 is a front index projection optical system, and the front index projection optical system 30 is the illumination light source 1.
Light source 31 such as near-infrared LED which emits light of wavelength close to 7
And a projection lens 32. The output of the light source 31 is modulated at a predetermined frequency in order to prevent the light flux of the illumination light source 17 from becoming noise for the front index detection optical system described later. The light from the light source 31 is collimated by the projection lens 32, and then reflected by the half mirror 12, and the optical axis L
The light passes through the inside of the nozzle 11 and the like and is irradiated onto the cornea Ec. This light flux is specularly reflected by the cornea Ec and forms an index i1 which is a virtual image of the light source 31 on the eye E to be examined. The light flux of the index i1 forms an image of the index i1 on the image pickup element of the TV camera 16 by the observation optical system.

(Front index detection optical system) 35 is a front index detection optical system, and the front index detection optical system 35 is the field stop 3.
6, a two-dimensional position detecting element 37, and an objective lens 13, a filter 14, and a half mirror 15 which are shared with the observation optical system.
Consists of. As for the diameter of the field stop 36, the unnecessary light is detected by the detection element 3
The light flux of the optotype i1 which is not incident on the TV camera 16 and is located at an almost proper position with respect to the reticle image on the TV camera 16 is detected by the detection element 3
It is set so as to enter 7. Various sensors such as CCD and PSD can be used as the two-dimensional position detecting element 37. Further, instead of the two-dimensional position detecting element, a split type photodetecting element of two or four divisions may be used.

The luminous flux of the front index specularly reflected by the cornea Ec is detected by the half mirror 15 in the front index detection optical system 35.
Is transmitted to the field stop 36, and is received by the detection element 37. The detection element 37 detects the vertical and horizontal positions of the eye to be inspected with respect to the measurement axis (observation optical axis L) based on the two-dimensional position of the light flux of the index i1 incident on the element surface.

(Distance index projection optical system) 40 is a distance index projection optical system, and M is its optical axis. Optical axis M is optical axis L
The optical axes are inclined with respect to each other, and the two optical axes intersect at a position away from the nozzle 2 by a predetermined working distance. The crossing angle of the optical axis M with respect to the optical axis L is preferably 20 degrees to 40 degrees. On the optical axis M, a light source 41 such as an LED having a wavelength different from that of the light source 31 and a projection lens 42 are arranged. The light emitted from the light source 41 is made into a parallel light flux by the projection lens 42, and is irradiated onto the cornea Ec along the optical axis M. The light beam specularly reflected by the cornea Ec forms an index i2 which is a virtual image of the light source 41.

(Distance index detection optical system) 50 is a distance index detection optical system, and N is its optical axis. Optical axis N and optical axis M
Has an axis symmetrical to the optical axis L, and the optical axis N intersects the optical axis M on the optical axis L. A light receiving lens 51, a filter 52, and a one-dimensional detection element 53 are provided on the optical axis N. The filter 52 transmits the light of the wavelength of the light source 41 of the distance index projection optical system 40, and the illumination light source 17 and the front index projection optical system 3
It has a property of not transmitting light of the wavelength of the light source 31 of 0,
The light of the index i1 or the light of the illumination light source 17 is used for the one-dimensional detection element 53.
It prevents the noise from being incident on the upper part.

The cornea reflected light flux of the light source 41 forming the index i2 is passed through the filter 52 by the light receiving lens 51
It is incident on the dimension detecting element 53. When the eye to be inspected moves in the axial direction of the optical axis L (forward and backward direction), the image of the index i2 by the light receiving lens 51 also moves in the detection direction of the one-dimensional detection element 53. The position of the eye to be inspected in the front-back direction is detected from the deviation of the index image on the one-dimensional detection element 53. A cylindrical lens having a generatrix direction in the detection direction may be arranged in front of the one-dimensional detection element 53.

<Joystick Mechanism> The joystick mechanism is composed of a moving mechanism for moving the joystick in the front-back, left-right, and axial directions, and a break mechanism for limiting the movement of the joystick. FIG. 4 is a cross-sectional view for explaining a moving mechanism using a joystick. A shaft 60 is inserted through the joystick 4, and a spherical portion 61 and a spherical lower end portion 6 are provided below the shaft 60.
2 is formed. Reference numeral 63 denotes a turning knob for turning the joystick, which is fixed to the shaft 60. An operation button 64 for issuing a trigger signal by a manual operation is arranged on the top of the rotary knob 4a, and a switch 65 is fixedly mounted on the turning knob 63. When the operation button 64 is pushed down, the switch 65 operates. , The signal is sent to the control circuit (described later) of the device via the electric wire 66,
The measurement is started.

The main body 3 has a friction plate 69 via a sliding plate 68.
It can be moved horizontally above. The friction plate 69 is attached to the base 1. Reference numeral 70 is a sliding plate embedded in the sliding plate 68, and 71 is a plate fixedly mounted on the main body 3. By turning the turning knob 63, the shaft 60 is rotated through the ball bearing 71a.
Is pivoted around the center of the spherical portion 61, so that the lower end of the shaft 60 causes the sliding plate 68 to swing. Sliding plate 68 and friction plate 6
The respective materials are selected so that the frictional force between 9 and 9 is larger than the frictional force between the plate 71 and the sliding plate 70.

The vertical movement of the measuring unit 5 by the rotary knob 4a is performed as follows. A disk 72 having a plurality of slits is fixedly arranged on the rotary knob 4a, and the disk 72 (a in FIG. 5) is simultaneously rotated by rotating the rotary knob 4a. 73 is an LED fixed to the shaft 60, 7
4 is a mask having two slits fixed to the shaft 60 via a nut 75 and a foot 76 (b in FIG. 5), 77
Is a phototransistor fixed to the shaft 60 via a nut 75. The light of the LED 73 passing through the mask 74 is intermittently applied to the phototransistor 77 by the rotation of the disk 72. The LED 73 and the phototransistor 77 are arranged in two pairs with the disk 72 and the mask 74 sandwiched therebetween, for a total of two pairs, and each pair is a slit 74 of the mask 74.
It is placed at a position corresponding to a and 74b. Mask 74
The two slits 74a, 74b are arranged at positions where the output waveforms of the phototransistors 77a, 77b corresponding to the respective slits are shifted by a half cycle. The output waveforms of the phototransistors 77a and 77b at this time are shown in FIG. Based on this output waveform, the rotation direction and the rotation amount of the rotary knob 4a are detected by a detection circuit (not shown).

The rotation direction of the rotary knob 4a is such that the phototransistor 77a (or 77b) at a certain reference point is set.
Photo transistor 77b (or 77
It can be detected by detecting the output state at the reference point of a). When the reference point is taken as shown in Fig. 5,
The phototransistor 77 at the reference point as shown in FIG.
When the output of b is the minimum value, it indicates normal rotation, and when it is the maximum value as shown in (b), it is judged to be inversion.

The phototransistor 77a (or 7)
Based on the output of 7b), the number of periodic waveforms from the reference point to the reference point within a predetermined time is counted, and the rotation amount of the rotary knob 4a is detected. The control circuit operates the vertical drive system (described later) of the measuring unit 5 by the rotation amount detected by the detection circuit (not shown) and the voltage corresponding to the rotation direction.

Next, the brake mechanism will be described with reference to the partial sectional view of FIG. A moving support base 80 is fixed to the lower portion of the main body 3 via a base 80a. The moving support base 80 rotatably holds a guide tube 82 via a bearing 81, and the guide tube 82 is held slidably in the axial direction of a horizontal shaft 84 via a bearing 83. Wheels 85 are fixed to both ends of the horizontal shaft 84, and the wheels 85 roll forward and backward on a guide plate 86 provided at the bottom of the base 1. As a result, the main body 3 receives the operation of the joystick 4 described above, and moves in the front-rear and left-right directions.

Reference numeral 90 is a piezo actuator held by the guide tube 82, and 91 is a fulcrum 9 fixed to the guide tube 82.
It is a break plate having 1a. Piezo actuator 90
When a voltage is applied to the piezoelectric actuator 90, the piezoelectric actuator 90 extends and pushes the upper end of the break plate 91. The brake plate 91 has a fulcrum 9
It rotates around 1a, and the brake plate 91
The lower end of the presses the horizontal shaft 84. As a result, the movement of the guide tube 82 with respect to the horizontal shaft 84 is braked, and the movement of the main body 3 in the left-right direction is suppressed and becomes heavy.
Reference numeral 92 is a solenoid embedded in one side of the horizontal shaft 84, and 93 is a pin of the solenoid 92. Reference numeral 94 is a friction plate fixed to the base 1. When the pin 93 is pushed out by the driving of the solenoid 92, the pin 93 hits the friction plate 94, so that the rotation of the horizontal shaft 84 is suppressed and the movement of the front-back movement becomes heavy. This break mechanism operates under the control of a control circuit (described later) during automatic alignment operation.

<Left / Right Eye / Rear Position Detection Mechanism> In FIGS. 2 and 7, reference numeral 100 is a micro switch for left / right eye detection. The micro switch 100 is fixed to the main body 3 via a mounting plate 101. Reference numeral 102 denotes a guide plate attached to the lower portion of the base 1, and the right side (upward in FIG. 7) is raised with the left and right center of the base 1 as a boundary. As the body part 3 moves left and right, the micro switch 100 moves the guide plate 10
When it is on the right side above 2, electricity is supplied. The left-right center of the subject fixed to the chin rest 2 corresponds to the left-right center of the base 1, so the left and right eyes of the subject are detected by the signal from the microswitch 100. The signal of the left and right eye detection mechanism is used as a signal for determining the left and right of the measurement eye and moving the drive mechanism that moves the measuring unit 5 back and forth, left and right, and up and down to the origin position.

Reference numeral 103 in FIG. 2 is a micro switch for detecting the rear (front of the examiner) end. Micro switch 103
Are held by the main body 3. Reference numeral 104 denotes a micro switch guide plate fixed to the base 1. Micro switch 1
The position of the guide plate 104 with respect to 03 is such that the contact of the micro switch 103 is pushed up when the main body 3 comes to the rearmost end of the forward and backward movement so as to energize. The detection signal of the micro switch 103 is used as a signal for moving the front, rear, left, right, and top and bottom of the measuring unit 5 to the origin position. In addition, in the present embodiment, a signal of a print switch or a power-on signal is used as the signal for moving the measuring unit 5 to the origin position.

<Control System> FIG. 8 is a block diagram showing a main part of a control system according to the present invention. Two-dimensional position detection element 3
The signals output from the 7- and 1-dimensional position detecting elements 53 are subjected to predetermined processing by the detection processing circuits 110 and 111, respectively, and input to the control circuit 112. The control circuit 112 performs well-known processing on these signals to obtain the amount of deviation (shift) in the up / down / left / right direction and the front / rear direction with respect to the proper position of the eye E to be inspected. Reference numeral 113 is a Y-direction drive system that moves the measurement unit 5 in the vertical direction (Y direction), 114 is an X-direction drive system that moves the measurement unit 5 in the horizontal direction (X direction), and 115 is a Z-direction drive system that moves the measurement unit 5 in the front-back direction (Z direction). It is a system. Each of these drive systems is composed of a motor and a motor drive circuit.
The driving is performed on the basis of the signals of the deviation information obtained by 12 in each direction.

Further, the control circuit 112 receives the signals from the left and right eye detecting microswitches 100 or the rear end detecting microswitches 103, and each drive system 113-1.
15 is operated to position the measuring unit 5 at the origin position. The origin position of the measuring unit 5 in the X and Y directions is substantially the center position of the movable range, and the origin position in the Z direction is the position closest to the examiner. The range of movement in the Y direction is relatively large, and
Since there is no danger that the movement in the direction will pose a risk to the subject,
It is possible to make changes such as returning to the origin position in the X, Y, Z directions only when the power is turned on or when printing out, and returning to the origin position only in the X and Z directions when switching between the left and right eyes. Reference numeral 116 is a Y-direction movement limit detection system of the measuring unit 5, 117 is an X-direction movement limit and left / right center position detection system, and 118 is a Z-direction movement limit detection system. Each detection system is composed of a transmissive sensor and a light shielding plate (or a micro switch or the like).

Reference numeral 119 is a character display circuit for generating figures and characters for alignment, and 120 is a TV.
Video signal from camera 16 and character display circuit 119
It is a synthesis circuit that synthesizes signals from. Control circuit 112
The signal of the displacement information in the front-rear direction obtained by is sent to the character display circuit 119, and the character display circuit generates a graphic signal of the distance mark and a position signal on the TV monitor 6 based on this signal. The signal from the character display circuit 119 is combined with the video signal from the TV camera 16 by the combining circuit 120 and output to the TV monitor 6. Distance marker
K is T corresponding to the distance from the nozzle 12 to the cornea Ec.
The top and bottom of the reticle image 131 on the V monitor 6 are moved in real time.

FIG. 9 is a view for explaining the display screen displayed on the TV monitor 6. 130 is an anterior segment image of the subject's eye, 1
Reference numeral 31 is a reticle image, 132 is a front target image, and 133 is a distance mark. Reference numerals 135 to 139 are instruction marks for notifying the examiner of the avoidance operation when the movement of each drive system due to the automatic alignment reaches the limit, and are generated by a signal from the character display circuit 119. Instruction mark 135
Indicates an upward direction, 136 a downward direction, 137 a leftward direction, 138 a rightward direction, 139 a backward direction (in the case where the arrow of the instruction mark 139 is opposite, a forward direction), which means that it should be manually moved. ing.

The operation of the apparatus having the above configuration will be described with reference to the flowchart of FIG. Although the apparatus can select manual alignment and automatic alignment by the alignment mode changeover switch, the case where automatic alignment is selected will be described here. When the power is turned on, the XYZ drive systems 113 to 11
5 is operated to position the measuring unit 5 at the origin position with respect to the main body unit 5. Each movement limit detection system 1 moves to the origin position.
It moves in one direction until it is detected by 16 to 118, and after the detection, each XY drive system is moved in the opposite direction by a predetermined number of pulses (by storing this number of moving pulses, the measuring unit 5
Position can be detected and this position information can be used to move to the origin position from the next time on).

The eye to be inspected is positioned at a predetermined position on the chin rest 2, the measurement switch is pressed, and the automatic alignment mechanism becomes operable. The examiner operates the joystick 4 to perform rough alignment. Coarse alignment is performed as follows. The anterior ocular segment image of the eye E to be inspected illuminated by turning on the illumination light source 17 is received by the TV camera 16 via the observation optical system together with the reticle image by the reticle optical system, and is displayed on the TV monitor 6. The examiner operates the joystick 4 and the rotary knob 4a while observing the anterior eye part image 130 and the reticle image 131 on the TV monitor 6, and moves the main body part 3 forward, backward, leftward and rightward with respect to the base 1. The measurement unit 5 is moved up and down with respect to 3, and the annular reticle 131 is adjusted to the vicinity of the center of the iris or the pupil of the anterior segment image.

When the image of the index i1 is formed on the TV monitor 6, the two-dimensional detection element 37 can detect the index i1, and thus the automatic alignment can be performed in the vertical and horizontal directions. When the light flux of the index i2 is incident on the one-dimensional detection element 53, the automatic alignment becomes possible in the front-back direction, and the distance mark 133 is displayed on the TV monitor 6. When automatic alignment becomes possible in the up / down / left / right direction and the front / rear direction, the control circuit 112 actuates the piezo actuator 90 and the solenoid 92 to make the main body part 3 heavy in the front / rear direction and the left / right direction. The piezo actuator 90 and the solenoid 92 may be operated separately for each direction in which automatic alignment is possible.

When the rough alignment is completed in this way, automatic alignment is executed. In the automatic alignment, as described above, the control circuit 112 uses the output signals from the two-dimensional detection element 37 and the one-dimensional detection element 53 to control the vertical, horizontal, and front-rear directions with respect to the position when the eye E is in the proper position. After obtaining the deviation amount, the X-direction driving system 114, the Y-direction driving system 113, and the Z-direction driving system 115 are operated based on the deviation information. The measurement unit is operated by the operation of each drive system so that the measuring unit 3
When moved with respect to each other, each index image moves on the two-dimensional detection element 37 or the one-dimensional detection element 53. Control circuit 112
Determines whether or not each index image is within the predetermined allowable range. When the index image falls within the allowable range, the control circuit 112 stops the operation of each drive system and the alignment is completed. Subsequently, the control circuit 112 issues a measurement start signal to operate the measurement system and execute the measurement.

Each of the X, Y, and Z movement limit detection systems 116-
When the movement limit is detected by 118, the drive system for automatic alignment is stopped. The control circuit 112 causes the TV monitor 6 to display instruction marks 135 to 139 indicating the direction in which the movement limit has been reached, and informs the examiner of the movement direction. When the movement limit is canceled by the coarse adjustment of the alignment by the examiner, the automatic alignment is activated again.
If the movement limit is not released within a predetermined time due to the rough adjustment of alignment, the brake by the piezo actuator 90 and the solenoid 92 is released (the brake may be released by the switch device of the examiner). . The examiner returns the joystick 4 to the front side when returning to the initial state. When the micro switch 103 for detecting the rear end is actuated and it is detected that the main body part 3 has reached the rearmost end of the forward and backward movement, the XYZ drive systems 113 to 115 (or each drive system other than the Y drive system may be used). It operates and positions the measurement unit 5 at the origin position with respect to the main body unit 5. By arranging the measurement unit 5 at the origin position in this way, it is possible to avoid the risk of the nozzle contacting the eye to be inspected and to ensure the directional freedom of movement of the measurement unit 5. The examiner repeats the alignment again.

When the breaker is released but the examiner does not return the joystick to the front side, the examiner operates the joystick 4 to move the measuring section 5 to the two-dimensional detection element 37 and the one-dimensional detection element 53. Moves to the position where each target image is detected, and the automatic alignment is activated.

When the alignment and one measurement operation are completed in this way, the presence or absence of a measurement end signal from the print switch or the like is detected. When the measurement end signal is obtained,
The measuring unit 5 is moved to the origin position. When the measurement end signal is not obtained, the presence / absence of the right / left eye switching signal by the micro switch 100 is detected. When the switching between the left and right eyes is detected, each of the XYZ drive systems 113 to 115 (each drive system other than the Y drive system may be activated) to move the measurement unit 5 to the origin position with respect to the main body unit 5. If the left / right eye switching signal is not detected, wait for the measurement switch to be pressed.

The above embodiment can be variously modified,
For example, it is necessary to change depending on each element such as the degree of alignment tolerance and the type of measurement method.
These changes are also included in the scope of the present invention and the same technical idea.

[0042]

As described above, according to the present invention,
Since the device for measuring and inspecting is moved to a predetermined permissible range for the eye to be inspected, the burden on the examiner is reduced, and the measurement can be performed quickly regardless of the skill of the alignment operation.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus according to an embodiment as viewed from an examiner side.

FIG. 2 is a side view including a partial perspective view of the apparatus of the embodiment.

FIG. 3 is a view of the alignment optical system of the apparatus of the embodiment as seen from above.

FIG. 4 is a cross-sectional view for explaining a moving mechanism using a joystick.

FIG. 5 is a diagram showing a structure of a disc and a mask.

FIG. 6 is a diagram showing an output waveform of a phototransistor.

FIG. 7 is a partial cross-sectional view for explaining a break mechanism.

FIG. 8 is a block diagram showing a main part of a control system according to the present invention.

FIG. 9 is a diagram illustrating a display screen displayed on the TV monitor 6.

FIG. 10 is a diagram showing a flow chart for explaining the operation.

[Explanation of reference numerals] 4 joystick 5 measuring section 30 front index projection optical system 35 front index detection optical system 40 distance index projection optical system 50 distance index detection optical system 112 control circuit 113 Y direction drive system 114 X direction drive system 115 Z direction Drive system

Claims (5)

[Claims] 1. An ophthalmologic apparatus having an inspection means for inspecting an eye to be inspected, aligning the inspecting means to the eye to be inspected in a predetermined positional relationship, and operating the inspecting means, the eye to be inspected by operation of an examiner. A first moving means for moving the inspection means, an index forming means for forming an alignment index on the eye to be inspected, an index detection means for detecting the alignment index, and the detected alignment index for the inspection Determining means for determining whether or not it is within a predetermined range with respect to the means, second moving means for further moving the inspecting means with respect to the moving position by the first moving means, and predetermined for the determining means. An ophthalmologic apparatus comprising: a control means for driving and controlling the second moving means based on the result of the index detection means when the distance is within the range. 2. The ophthalmologic apparatus according to claim 1, wherein when the determination unit determines that the ophthalmologic apparatus is within a predetermined range, the first
An ophthalmologic apparatus comprising a suppressing means for suppressing the movement of the moving means. 3. The ophthalmologic apparatus according to claim 2, wherein the movement limit detection unit detects that the movement of the inspection unit by the second movement unit has reached a limit, and the movement limit detection unit determines the movement limit. An ophthalmologic apparatus comprising an informing unit that informs the examiner of the direction in which the examiner operates the first moving unit when detected. 4. The ophthalmologic apparatus according to claim 1, wherein the second moving means has a driving means that moves at least vertically and horizontally. 5. The ophthalmologic apparatus according to claim 1, further comprising an observing unit for observing an anterior segment image of the eye to be inspected, for superimposing the image on the anterior segment image to inform a moving direction of the first moving unit. An ophthalmologic apparatus characterized in that it has an optotype forming means for forming an index.