JP2002010981A - Eye refracting force measurement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eye refracting force measurement device for obtaining a distance between pupils at the time of far sight and near sight. SOLUTION: This eye refracting force measurement device 312 is provided with a left eye refracting force measurement unit 319L and a right eye refracting force measurement unit 319R capable of the objective and subjective measurement of a customer 407 and the respective units 319L and 319R are provided so as to be driven at least to the left and right by independent three-dimensional driving devices 3177L and 317R respectively. The eye refracting force measurement device is provided with horizontal rotation devices 318L and 318R for respectively independently and horizontally turning the respective eye refracting force measurement units 319L and 319R and an arithmetic control circuit 315a for obtaining the interval of both units 319L and 319R and a measurement optical axis angle from the driving amount to the left and right and horizontal turning amount of the units 319L and 319R and obtaining the distance between the pupils of the left and right eyes of the customer 407 from the internal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eye-refractive-power measuring apparatus for subjectively and objectively measuring the eye refractive power of an eye to be examined.

[0002]

2. Description of the Related Art Conventionally, as an eye refractive power measuring device for measuring the eye refractive power of an eye to be examined, an optometric device as disclosed in Japanese Patent Application Laid-Open No. 2000-83900 is known. This optometry apparatus is configured to measure the eye refractive power of the left and right eyes of the subject simultaneously and subjectively and objectively, and to obtain the interpupillary distance of the left and right eyes of the subject. Has become.

[0003]

However, in this optometry apparatus, since the obtained interpupillary distance is used for internal control without outputting, the obtained interpupillary distance is used as data for manufacturing glasses. It was not intended to be output. Moreover, in this optometric apparatus, the interpupillary distance when the left and right eyes are far vision can be obtained, but the interpupillary distance when the left and right eyes are looking at the near portion cannot be measured. there were.

An object of the present invention is to provide an eye-refractive-power measuring apparatus capable of determining the distance between pupils when the user has a far vision and a near vision.

[0005]

In order to achieve the first object, an object of the present invention is to provide a left eye refractive power measuring unit and a right eye refractive power measuring unit which can be determined objectively and subjectively. An eye-refractive-power measuring unit is provided, wherein each of the eye-refractive-power measuring units is provided so as to be able to be driven at least to the left and right by independent driving means. Horizontal rotation means for horizontally rotating independently, and determining the distance between the binocular refractive power measurement units and the measurement optical axis angle from the left and right drive amounts and the horizontal rotation amounts of the eye refractive power measurement units, An eye refractive power measuring device having an arithmetic control circuit for calculating the distance between the pupils of the left and right eyes of the subject from the above.

According to a second aspect of the present invention, the eye refractive power measuring unit is provided so as to be driven back and forth, left and right, and up and down by a three-dimensional drive mechanism, and is capable of automatic alignment. .

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 300 denotes an optometry information center, 301 and 302 denote buildings such as supermarkets in different places from the optometry information center 300, 303 and 304 denote buildings such as department stores, and 305 denotes a building such as a station. These buildings 3
Optometry boxes B1 to B5 are provided at corners 01 to 305.
Is arranged.

The optometry information center 300 is provided with an optometry information processing device 306. The optometry information processing apparatus 306 includes a computer (information processing apparatus main body, information processing means) 307 as a center-side control means, and operation means 308 such as a keyboard and a mouse of the computer 307.
And a large number of display devices 3 such as monitor televisions and liquid crystal televisions
09 as a center-side display device.

As shown in FIG. 4A, an optometry table 310 is provided in the optometry boxes B1 to B5, and a customer chair (examinee chair) 311 is provided. I have. Then, on the optometry table 310,
Eye refraction measuring devices 312 capable of measuring the eye refraction by subjective and the eye refraction by objective are installed as optometry devices, respectively. This optometry box B1-B
5 is connected to a computer 307 via the Internet (network) 311. [Eye Refractive Power Measurement Apparatus 312]
As shown in FIGS. 4 to 7 and 9, a lifting / lowering device (vertical drive means) 313 configured to vertically drive the support shaft 313 a using a pulse motor, a hydraulic cylinder, or the like mounted on the optometry table 310. , An optometric apparatus main body 314 mounted on the support shaft 313a, and a personal computer main body 315 used to control the operation of the elevating and lowering apparatus 313 and the optometric apparatus main body 314. In this personal computer body 315, FIG.
1, and a joystick lever 315b is connected to the arithmetic control circuit 315a as a measuring operation means and a driving operation means.

The main body 315 of the personal computer includes measurement mode changeover switches such as an optometry mode selection switch 31c for selecting an objective or subjective optometry mode, a distance measurement switch 315d, and a near measurement switch 315e. It is provided as. These switches 315c to 315
The signal from e is input to the arithmetic control circuit 315a, and the operation signal of the joystick lever 315b is also input to the arithmetic control circuit 315a. Further, the personal computer main body 315 includes a switch 315f for operating the elevating / lowering device 313 to raise the optometric apparatus main body 314, and a switch 315 for operating the elevating / lowering apparatus 313 to lower the optometric apparatus main body 314.
g is provided as drive operation means. The signals of the switches 315f and 315g are also input to the arithmetic and control circuit 315a. When receiving the ON signal from the switch 315f, the arithmetic control circuit 315a activates the elevating device 313 to raise the optometric device main body 314, and the switch 3
When receiving an ON signal from 15 g, the elevating device 313 is operated to lower the optometry apparatus main body 314.

The main body 314 of the optometry apparatus is composed of
16 and a pair of three-dimensional driving devices (three-dimensional driving mechanisms) 317L, 317R disposed on the left and right inside the case body 316.
And three-dimensional drive devices 317L and 317L as three-dimensional drive means.
17R, horizontal rotation devices (horizontal rotation drive devices) 318L and 318R, and horizontal rotation devices 318
It has a left eye refractive power measurement unit 319L and a right eye refractive power measurement unit 319R respectively disposed on L and 318R.

The eye refractive power measuring units 319L and 319R each have an arithmetic control circuit 400, and the arithmetic control circuit 400 has a position detection circuit 401 shown in FIG.

An optometry window 402 is formed at the upper center of the front of the case body 316, and a wide-angle television camera (imaging means) 403 located above the optometry window 402 is formed at the upper center of the front of the case body 316. Installed. The case body 316 includes a left eye refractive power measurement unit 3.
Distance measuring means (distance measuring sensor) 4 positioned between 19L and the right eye refractive power measuring unit 319R, that is, positioned at the upper center of the optometry window 402 to measure the distance to the face of the subject.
04 is attached. Further, a human sensor 405 using infrared light is attached to the lower end of the front center of the case body 316, and a display device 406 such as a liquid crystal display is attached to the lower center of the front face of the case body 316 as a display device for the optometry apparatus main body. Have been.

The distance measuring means 404 measures the distance to the face of the customer 407 sitting on the customer's chair (examinee's chair) 311 and inputs the measured distance to the arithmetic and control circuit 315a. The human sensor 405 senses the customer 407 sitting on the customer chair (examinee chair) 311 and inputs a sensing signal to the arithmetic and control circuit 315a.

Further, an image 408a of the face 408 taken by the television camera 403 is displayed on the upper right portion of the display device 406 via the arithmetic and control circuit 315a, and the left and right portions of the display device 406 are provided with an eye refractive power measuring unit 319L. , 319
Anterior eye images 409L, 409R of the subject captured by imaging tubes (television cameras) 38, 38 of R described later are projected via arithmetic and control circuits 400, 400, and 315a. <Three-dimensional driving device> Three-dimensional driving device (three-dimensional driving means)
317L and 317R are a Y (vertical) direction driving device 320 that drives the support shaft 320a up and down using a pulse motor, a hydraulic cylinder, and the like, and a Y (vertical) direction moving table attached to the upper end of the support shaft 320a. 321 and Y
A Z (front and rear) direction moving table 322 mounted on the table 320a so as to be movable in the Z (front and rear) direction, and an X (left and right) direction mounted on the Z direction moving table 322 so as to be movable in the X (left and right) direction. It has a moving table 323.

As shown in FIG. 8, the Z-direction moving table 322 includes a pulse motor (Z-direction driving device) 324 attached to the Y-direction moving table 321 and a feed screw rotatively driven by the pulse motor 324. 325
, So that it can be driven forward and backward in the Z (front-back) direction. The X-direction moving table 323 is a pulse motor 326 attached to the Z-direction moving table 322.
And a feed screw 327 which is driven to rotate by a pulse motor 326 so as to be driven forward and backward in the X (left and right) direction.

The Y-direction driving device 320 and the pulse motors 324 and 326 are provided with an arithmetic control circuit 400 as described later.
Is controlled by the position detection circuit 401. <Horizontal rotating device> Also, a horizontal rotating device (horizontal rotating means)
318L and 318R are three-dimensional driving devices 317L and 317
It is fixed to the center of the upper surface of R. This horizontal rotating device 31
8L, 318R have rotating shafts 318, 318 that are driven to rotate about a vertical axis by a pulse motor or the like. The rotation shafts 31 of the horizontal rotation devices 318L and 318R
A left eye refractive power measurement unit 319L and a right eye refractive power measurement unit 319R are fixed to 8,318. <Eye refractive power measurement unit> Left eye refractive power measurement unit 31
The configuration of the 9L and the right eye refractive power measurement unit 319R is substantially the same except for omitting a part thereof. Therefore, the measurement optical system of the left eye refractive power measurement unit 319L will be described first. (A) Measurement optical system of left eye refractive power measurement unit 319L and its control system The measurement optical system of left eye refractive power measurement unit 319L is:
As shown in FIG. 16, an objective left-eye refractive power measuring optical system 33 is used.
0L, a subjective eye-refractive-power measuring optical system 340L, and a case (housing) 350L accommodating them. (Objective left eye refractive power measuring optical system 330L) The objective left eye refractive power measuring optical system 330L includes an eye position detection system 50,
A target projection optical system 51 for projecting the measurement target to the fundus of the eye to be examined, a two-dimensional detector 52 for detecting the amount of deviation of the measurement target image, and a target light receiving optical system for projecting the measurement target image of the fundus of the eye to be examined to the two-dimensional detector 52 It has a system 53, a fixation target system 54 for fixing the collimation axis of the eye to be examined, and an aiming optical system 55 for displaying the positional relationship between the eye ER (left eye) and the apparatus.

As shown in FIG. 16, the eye position detection system 50 includes a light emitting element 102, a projection lens 104, a first half mirror 106, and a second half mirror 108 arranged on the reflection optical axis of the second half mirror 108. I do. Further, the imaging lens 109, the chopper 110, and the two-dimensional light receiving element 1 are arranged on the reflection optical axis of the first half mirror 106.
Place 12

Further, a reference signal light emitting element 113 is arranged on one side of the chopper 110, and a reference signal light receiving element 114 is arranged on the other side. The light-emitting element 102 and the light-receiving element 112 are located at the midpoint C (the focal position when the cornea is convex) between the corneal vertex and the center of the corneal curvature of the eye to be examined EL (left eye) and the projection lens 104.
And the imaging lens 109 is conjugate.

That is, when the eye to be inspected EL (left eye) is at an appropriate position, the light beam reflected from the cornea of the eye becomes a parallel light beam, and the image of the light emitting element 102 is formed on the light receiving element 112 by the image forming lens 109. 102a. Chopper 110
As shown in FIG. 17, is constituted by a disk having a plurality of fan-shaped slits 115, and rotates around a disk center. The optical axis 118 passes through the approximate center of the fan-shaped slit 115.

An aperture 119 is provided to make the amount of light incident on the light receiving element 112 constant, and has an aperture twice as large as the fan-shaped slit 115. The light flux 120 in the fan-shaped slit 115 is a substantially circumscribed circle of the opening of the stop 119.

The principle of detection of the eye position detection system 50 in the above configuration is as follows. When the chopper 110 rotates when the image forming point (122) by the image forming lens 109 is located behind the light receiving element 112 (the side opposite to the image forming lens 109), as shown in FIGS. 115 gradually passes through the light beam of the imaging lens,
Light beams such as those shown in FIGS. FIG.
In X, X indicates the passing position of the optical axis, and O indicates the center of gravity of the cross section of the incident light beam. The detection signal of the light receiving element 112 at this time is as shown by a solid line in FIG. In FIG.
The horizontal axis indicates the position of the chopper, and the vertical axis indicates the coordinates in the Y direction.

When the image forming point (122) of the image forming lens 109 is in front of the light receiving element 112 (on the side of the image forming lens 109), when the chopper 110 rotates, as shown in FIGS. Become. 21 and 22 correspond to FIGS. 18 and 19, respectively. The detection signal of the light receiving element 112 at this time is shown in FIG.
0 as indicated by the dotted line.

Further, when the image forming point of the image forming lens 109 is on the light receiving element 112, the detection signal of the light receiving element 112 is a straight line parallel to the horizontal axis as shown by the dashed line in FIG.

That is, based on the detection signal of the light receiving element 112, the position of the image forming point in the front-back direction of the light receiving element, in other words, in which direction the cornea vertex of the eye to be examined is shifted from the predetermined position in the front-back direction and how much. Can be detected. At the same time, by detecting the coordinates of the average incident position on the light receiving element 112, it is possible to detect in which direction the corneal vertex position of the subject's eye is shifted in the vertical and horizontal directions with respect to a predetermined appropriate position and how much. . In the present embodiment, when the eye to be examined ER (left eye) is at an appropriate position, the light receiving element 112 may be arranged at a position conjugate with the corneal vertex or the corneal curvature center of the eye to be examined.

As shown in FIG. 16, the target projection optical system 51 includes a pair of infrared light sources 1a and 1a arranged around the optical axis.
b, condenser lenses 2a and 2b for condensing light from infrared light sources 1a and 1b, respectively, a collimator lens 3 for producing parallel light, a measurement target 5 having a circular aperture stop 4, an imaging lens 6, an imaging lens for projection 7. A half mirror 8 relating to infrared light, a dichroic mirror 9 having a characteristic of reflecting infrared light in a long wavelength portion and transmitting a visible portion and infrared light adjacent thereto, and is supported by a support arm 351 on a case 350L. And a half mirror Hm.

The pair of infrared light sources 1a and 1b are turned on alternately at a high speed, and the light sources 1a and 1b are integrally rotatable about the light source. Further, in the above configuration, light from the pair of infrared light sources 1a and 1b is condensed by the condenser lenses 2a and 2b, respectively, is further collimated by the collimator lens 3, and obliquely enters the circular aperture stop 4. . The light that has passed through the circular aperture stop 4 forms an image at the position of the point P1 by the imaging lens 6, and then forms a projection imaging lens 7, a half mirror 8, a dichroic mirror 9, and a half mirror Hm.
Is incident on the eye to be examined EL (left eye) via.

Here, the images of the infrared light sources 1a and 1b correspond to the subject's eye EL.
An image is formed at the pupil position of the (left eye), and an image of the circular aperture stop 4 of the measurement target 5 is formed on the fundus P2 of the eye to be examined. When the measurement target 5 and the fundus P2 of the eye to be examined EL (left eye) are in a conjugate positional relationship, the image of the circular aperture stop 4 illuminated by the light from the infrared light source 1a and the infrared light source 1b
And the image of the circular aperture stop 4 illuminated by light from
An image is formed at the same position on the fundus P2. On the other hand, the measurement target
When the eye 5 and the fundus P2 of the eye to be examined EL (left eye) are not in a conjugate positional relationship, the four images of the circular aperture stop illuminated by the light from the infrared light source are formed at two separate places of the fundus P2. .

As shown in FIG. 16, the target light receiving optical system 53 is disposed at a position conjugate with the cornea of the eye to be examined with respect to the dichroic mirror 9, the half mirror 8, the light receiving objective lens 10, the mirror 11, and the light receiving objective lens 10. The corneal reflected light blocking aperture 12 and the relay lens 13 are provided.

As shown in FIG. 23, the corneal reflected light blocking diaphragm 12 is a diaphragm plate having a substantially circular hole and having projecting light shielding portions 12a and 12b at two target positions with respect to the optical axis passing position. Further, the corneal reflected light blocking aperture 12 is configured to rotate in conjunction with this rotational movement when the infrared light sources 1a and 1b rotate around the optical axis. Further, the corneal reflected light blocking aperture 12 is disposed at the front focal position of the relay lens 13, and the projection optical system using the relay lens 13 is similar to the telecentric optical system.

In the above configuration, the measurement target image of the fundus P2 of the eye to be inspected is composed of the half mirror Hm, the dichroic mirror 9, the half mirror, the light receiving objective lens 10, and the mirror 1.
1. The image is projected onto the two-dimensional detector 52 by the relay lens 13.

At this time, the harmful reflected light from the cornea of the eye is
The light is removed by the protruding light shielding portions 12a and 12b of the reflected light blocking aperture 12. Further, since the corneal reflected light blocking aperture 12 and the relay lens 13 constitute an optical system similar to the telecentric optical system, the measurement target image formed on the measurement optical system 14 is a principal ray parallel to the optical axis. And has a property that the center position of the circular hole image as the measurement target image is not displaced before and after the imaging position.

The two-dimensional detector 52 discriminates whether the image of the circular aperture stop 4 in the fundus of the eye to be examined matches or separates by alternately lighting the infrared light sources 1a and 1b. Measure. From the measured values, the refractive power of the eye to be examined in the meridian direction in which the infrared light sources 1a and 1b are arranged is calculated by a known arithmetic circuit.

As shown in FIG. 16, the fixation target system 54 includes a visible light source 31, a condenser lens 32, a fixation target 33 movable in the direction of the light source, a mirror 34, a projection lens 35, and a visible light source that reflects red light. The dichroic mirror 36 transmits external light.

In the above configuration, the light from the visible light source 31 illuminates the fixation target 33 via the condenser lens 32. The light from the fixation target 33 passes through the mirror 34, the projection lens 35, and the dichroic mirror 36, passes through the half mirror 9, and the half mirror Hm, and is projected to the eye EL (left eye). The subject fixes the collimation direction by gazing at the fixation target 33.

The aiming optical system 55 includes a half mirror Hm, a dichroic mirror 9, a dichroic mirror 36, a projection lens 36 ', a half mirror 37, and an image pickup tube (anterior segment image difference representative means) 38 arranged on the same optical axis. And a light source 40, a condenser lens 41, a collimating plate 42, and a mirror on the reflection optical axis of the half mirror 37.
44 and a projection lens 45 are arranged. The image pickup tube 38 is connected to the display device 406 via the arithmetic control circuit 400. The collimating plate 42 has a circle in the center as shown in FIG.
It has a collimating scale with a radiation aperture around it.

In the aiming optical system configured as described above, the image pickup tube 38 includes an anterior eye image 409L of the subject's eye EL (left eye) by the projection lens 36 'and a collimation scale 43 by the projection lens 45. The image 43a is projected in an overlapping manner. The customer 407 looks at the display device 406, and the center of the pupil image Ep of the subject's eye matches the image 43a of the collimation scale 43, and the optical axis of the subject's eye matches the optical axis of the target light receiving optical system 52. As described above, the present apparatus is moved up, down, left, and right with respect to the subject's eye using the joystick lever 315b.

In the above configuration and operation, at least
The refractive power of the eye to be examined in three meridian directions is measured, and the refraction, astigmatism, and astigmatic direction of the eye to be examined are obtained from the measured values.

Next, the two-dimensional light receiving element 112 of the eye detection system 50
An electric circuit that moves the auto-refractometer body in response to the detected signal and makes the relative positional relationship between the subject's eye and the auto-refractometer appropriate will be described with reference to FIG. As shown in FIG. 26, when the light beam 100 enters, the light receiving element 112 applies voltages X ₁ , X ₂ , Y ₁ , and X ₂ corresponding to the distances x ₁ , x ₂ , y ₁ , and y _{2 according} to the coordinates of the incident position. and outputs a Y _2. When the light beam 100 enters the center of the light receiving element 112, X ₁ = X
_2, the Y ₁ = Y _2. In this embodiment, the chopper 110
The light beam scans in the Y direction by the rotation of.

First, the displacement in the X direction, that is, the horizontal direction,
A circuit for detecting and adjusting will be described. Light receiving element 112
X₁Output terminal, X_TwoOutput terminals are amplifier circuits 200 and 20, respectively.
1 and the amplifier circuits 200 and 201 respectively (X₁−X_Two)
Subtraction circuit 202 and (X₁+ X _Two)
It is connected to the. The subtraction circuit 202 and the addition circuit 204
₁−X_Two) / (X₁+ X_Two) Is connected to the division circuit 206 for calculating
You. The division circuit 206 calculates (X ₁−X_Two) / (X₁+ X_TwoJudge the sign of)
Through the direction discriminating circuit 208 and the driver 210.
326.

In the above circuit, since the scanning by the chopper 110 is performed in the Y direction, the signals X ₁ and X ₂ indicating the average position of the light flux 100 are received by the light receiving element regardless of the displacement amount of the subject's eye. As long as the amount of light incident on 112 does not change, it is output at a constant level. Output signal X of light receiving element 112
₁ and X ₂ are amplified by amplifier circuits 200 and 201, respectively.
Each operation (X ₁ −X ₂ ) in the subtraction circuit 202 and the addition circuit 204
And (X ₁ + X ₂ ).

The outputs of the arithmetic circuit 202 and the adder circuit 204 are divided by
By the arithmetic circuit 206, (X₁−X_Two) / (X₁+ X _Two) Is calculated,
This is because even if the amount of light incident on the light receiving element 112 fluctuates,
It is possible to obtain a constant level voltage signal corresponding to the coordinate position.
This is to make it possible. (X₁−X_Two) / (X₁+ X_Two) = X value
The absolute value of indicates the amount of displacement of the subject's eye in the X direction. Division circuit 206
Is input to the direction discriminating circuit 208, and the positive
Negative is determined. The sign of X indicates the direction of displacement in the X direction.
You. Due to the distinction between positive and negative X, driver 210
Drive the motor 326 to position it in the X direction (left / right direction).
Adjust it.

Next, a circuit for detecting and adjusting the displacement in the Y direction, that is, the vertical direction, will be described. Chopper 110
Is performed in the Y direction, the voltage signals Y1 and Y2 output from the light receiving element 112 are modulation signals corresponding to the scanning.

Here, the voltage signals Y1 and Y2 correspond to the eye position
As described in the explanation of the principle of the position detection system 50,
Information on the position of the refractometer in the front-rear direction (optical axis direction)
Signal Y₁(Z₁), Y_Two(Z_Two)
And Y of light receiving element 112₁(Z ₁), Y_Two(Z_Two) Output terminal
Through the amplification circuits 220 and 221 of the position detection circuit 401 in FIG.
It is connected to the subtraction circuit 222 and the addition circuit 224. Position detection times
The subtraction circuit 222 of the path 401 connects the low-pass filter circuit 226
And the adder 224 is directly connected to the divider 228.
Connected to division circuit 228. The division circuit 228
As with the circuit of FIG.
Connected to a Y-direction driving device 320 such as a pulse motor.
ing.

The operation in the above circuit is the same as that in the above-described X direction except that the low-pass filter circuit 226 converts the output signal from the subtraction circuit 222 into a voltage signal of a constant level under the influence of its modulation component, that is, the signals Z1 and Z2. The operation of the circuit is the same as that of ( ₁ ). The driver 232 drives the Y-direction driving device 320 such as a pulse motor to discriminate the positive and negative of (Y ₁ −Y ₂ ) / (Y ₁ + Y ₂ ), Adjust the misalignment.

Next, an electric circuit for detecting and adjusting a deviation in the Z direction (front-back direction) will be described. The subtraction circuit 222 and the addition circuit 224 in the circuit relating to the Y direction are directly connected to the division circuit 242. The division circuit 242 is connected to the pulse motor 324 via a band-pass filter circuit 244, a synchronous rectification circuit 246, a low-pass filter circuit 248, a direction discrimination circuit 250, and a driver 252. Further, the reference signal detection element 114 is connected to a synchronous rectification circuit 246 via an amplification circuit 260. In the above circuit, the division circuit 242
The signal Y ₁ (Z ₁ ) −Y ₂ (Z ₂ ) / Y ₁ (Z ₁ ) + Y ₂ (Z ₂ ) is calculated,
The signal is input to the band-pass filter circuit 244. The output from the bandpass filter circuit 244 outputs a modulated wave having an amplitude proportional to the amount of displacement in the Z direction. This modulated wave
As shown in FIGS. 27A and 27B, the signals have different phases depending on the direction of the shift. On the other hand, the output of the reference signal detection element 114 is
The reference signal of the rectangular wave shown in FIG. 27C which is amplified by the amplifier circuit 260 is input to the synchronous rectifier circuit 246.
The synchronous rectifier circuit 246 synchronously rectifies the output from the band-pass filter circuit 244 with the reference signal, and outputs the signal shown in FIG. 27D or 27E depending on the direction of the shift. The output from the synchronous rectifier circuit 246 is converted into a signal of FIG. 27F or G by a low-pass filter circuit 248 and input to the direction discriminating circuit 250. Direction discrimination circuit 250
Of the signal input to the driver 252 is input to the driver 252 as a signal in the direction of the deviation.
24 is driven.

In the circuit processing described above, the light emitting element 102 is lit by DC. However, when the luminous element 102 is lit by AC (for the purpose of improving S / N), a signal can be obtained in a similar manner by adding some circuits.

In order to detect the amount of shift and the direction of shift only in the Z direction, a one-dimensional element may be arranged at the same position in the scanning direction of the chopper instead of the two-dimensional element of the above embodiment. I just need.

Further, in the above embodiment, the chopper 110 of the eye position detection system is arranged on the light receiving side.
This can be arranged between the light emitting element 102 on the light emitting side and the projection lens 104. (Spontaneous eye refractive power measuring optical system 340L) The subjective eye refractive power measuring optical system 340L is a liquid crystal display for displaying other optometric charts for the subjective optometry such as a Landolt ring and a chart for a red / green test. Container (display means) 3
41 and a turret disk 34 for a spherical lens in which a number of spherical lenses 342a having different refractive powers are arranged and held in the circumferential direction.
2, a turret disk 343 for a cylindrical lens in which a large number of cylindrical lenses 343a having different cylindrical powers and each of which the axial angle can be adjusted are arranged in the circumferential direction, and a mirror 344;
It has a relay lens 345, a half mirror 346 disposed between the half mirrors 9 and 108, and a half mirror 9 and Hm. The turret disks 342 and 343 are also provided with through holes (not shown) without the lenses 342a and 343a.

The left eye refractive power optometry unit 319L
Has the arithmetic control circuit 400 shown in FIG. The arithmetic control circuit 400 includes a spherical lens turret driving device 4 that rotationally drives the spherical lens turret disk 342.
11, a cylindrical lens turret driving device 412 that rotationally drives a turret disk 343 for a cylindrical lens, and a liquid crystal display 341.

The operation control circuit 315a is connected to the customer 3
07 is a distance measurement switch 31 for the subjective optometry mode
5d, when the near measurement switch 315e in the subjective optometry is turned on, an optometry chart is displayed on the liquid crystal display 341 via the arithmetic and control circuit 400. At this time, when the distance measurement switch 315d is turned on, the arithmetic control circuit 400
Controls the operation of the horizontal rotation device 318L to maintain the main optical axis OL of the left-eye refractive power optometry unit 319L in a state where the main optical axis OL is directed left and right. When the near measurement switch 315e is turned on, the arithmetic and control circuit 400 controls the operation of the horizontal rotation device 318L to move the left eye refractive power optometry unit 319L by a predetermined amount (set amount) as indicated by an arrow 412. While rotating horizontally, the operation of the pulse motor 326 is controlled so that the left eye refractive power optometry unit 319L is turned into the right eye refractive power optometry unit 3
It is moved to the 19R side by a predetermined amount (set amount).

The optometry chart displayed on the liquid crystal display 341 is the lens 3 of the turret disks 342 and 343.
42a, 343a or through holes (not shown), mirror 34
5, the light enters the left eye E via the half mirror 9 and Hm. (B) Measurement optical system of right eye refractive power measurement unit 319R and its control system The measurement optical system of right eye refractive power measurement unit 319R is:
As shown in FIG. 16, an objective left-eye refractive power measuring optical system 33 is used.
It has an OR, a subjective eye refractive power measuring optical system 340R, and a case (housing) 350R that accommodates them.

Since the measuring optical system 330R of the right eye refractive power measuring unit 319R is exactly the same as the measuring optical system 330L of the left eye refractive power measuring unit 319L, the description thereof will be omitted.

Next, the state of use of the eye-refractive-power inspection apparatus having such a configuration will be described. (1) Customer Sensing When the customer 407 sits on the chair 311, the human sensor 40
5 senses this, and this sensing signal is sent to the arithmetic and control circuit 315.
Input to a. As a result, the arithmetic control circuit 315a
The computer (the optometry information processing apparatus) of the optometry information center 306 via the Internet 310 while turning on the eye refractive power measurement device 314 as an optometry device.
307.

Thus, the computer 307 of the optometry center 306 informs a manager in the center of the fact by sounding a buzzer (not shown), or displays characters or graphics (icons) or rotation on the display device 309. The information is displayed to the center manager by flashing a lamp or LED.

The arithmetic and control circuit 315a detects the face of the customer (examinee) from the forehead detection sensor 404 by
Information is obtained as to whether or not 14 has been set at a predetermined position. (2) Vertical coarse alignment of the optometry apparatus main body 314 The arithmetic control circuit 315 a
4 is turned on, the television camera 403 captures an image of the face 408 of the customer 407, and the captured face image 40
8a is displayed on the upper right portion 406a of the display device 406 as shown in FIGS. 9, 12, 14, and 15. Further, the arithmetic and control circuit 315a includes the eye refractive power measurement units 319L and 319L.
The anterior segment images 409L and 409R of the customer 407 captured by the 19R image pickup tubes (television cameras) 38 and 38 are displayed on the left and right display units 406b and 406c at the lower part of the display device.

By the way, the optometry window 4 of the optometry apparatus main body 314.
02 and the customer 407 are not aligned with each other, the display unit 4
When the face image 408a displayed on the image 06a is positioned below as shown in FIG. 12 and the lower portion of the image 408a is missing, the image pickup tubes (television cameras) 38, 38 of the eye refractive power measurement units 319L, 319R. Does not image the anterior segment of the customer 407, so the display device 406 displays the anterior segment image 4
09L and 409R are not displayed.

In this case, the switch 315g is turned ON. Accordingly, the arithmetic and control circuit 315a operates the elevating device 313 to lower the optometry apparatus main body 314.
By this driving, the television camera 403 also descends, and the face image 308a is displayed on the display unit 406 at the upper right of the display device 406.
It is displayed so as to rise on a and fit as shown in FIG. At this position, when the user releases the switch 315g, the arithmetic and control circuit 315a stops the lifting / lowering device 313. By this operation, the optometry window 40 of the optometry apparatus main body 314 is operated.
When the eye heights of the eye 2 and the customer 407 match, the image pickup tubes (television cameras) 3 of the eye refractive power measurement units 319L and 319R 3
An anterior segment image 409 of the customer 407 taken at 8, 38
L, 409R is displayed on the display device 406, and the rough alignment is completed.

Conversely, even when the upper portion of the image 408a displayed on the display unit 406a is missing, the height of the optometry window 402 of the optometry apparatus main body 314 and the eye of the customer 407 do not match. Since the imaging tubes (television cameras) 38 and 38 of the measurement units 319L and 319R do not image the anterior segment of the customer 407, the display device 406 does not display the anterior segment images 409L and 409R. In this case, the switch 315f is turned on to operate the lifting / lowering device 313 to raise the optometry apparatus main body 314, and the face image 308 is displayed.
1A is displayed on the display unit 406a at the upper right of the display device 406. FIG.
Display is made to fit as shown in FIG. By this operation, the optometry window 402 of the optometry apparatus main body 314 and the customer 407
When the eye height of the eye matches, the eye refractive power measurement unit 319L,
The anterior segment images 409L, 409R of the customer 407 captured by the imaging tubes (television cameras) 38, 319R are displayed on the display device 406.

If the customer 407 cannot perform such an operation, an administrator of the optometry information center 306 remotely operates the eye refraction measuring device 312 via the computer 307 and the Internet 310, and Tell the customer 407n how to use it with a speaker
Alternatively, the usage is displayed in characters on the display device 406. If the operation method is still unknown, the administrator of the optometry information center 306 can use the computer 307 and the Internet 310 to execute the eye refraction measurement device 312.
Is remotely operated to adjust the optometry apparatus main body 314 of the eye refraction measurement apparatus 312 up and down as described above, and perform coarse vertical alignment so that the face of the customer 407 matches the optometry window 402.

Further, even when the customer 407 does not understand the optometry method described below, the manager of the optometry information center 306 performs the optometry by remotely operating the eye refraction measuring device 312. (3) Rough Alignment of Left and Right Eyes In a state where the above-described rough alignment is completed, the image pickup tube 38 has an anterior eye image 409L of the eye to be inspected EL (left eye) by the projection lens 36 ′ and a projection lens 45. The image 43a of the collimation scale 43 is projected in an overlapping manner. In this state, the interval between the eye refractive power measurement units 319L and 319R is initially set to match the standard human pupil distance.

In this state, the arithmetic and control circuit 315a outputs the left and right eye refractive power measurement units 31 to the customer 407 by voice through a speaker (not shown) or by text on the display device 406.
9L and 319R are indicated.

In this case, the arithmetic and control circuit 315a controls the arithmetic and control circuit 400 to cause the horizontal rotation device 320 to move the eye refractive power measuring units 319L and 319R to the arrow 412.
Is rotated horizontally in the direction of, and the optical axes O1,
O2 is set to be parallel, and the customer 407 is moved to the far vision position by the driving means 33a to urge the customer 407 to fixate the fixation target 33 on the left eye of the customer. An instruction to adjust the optical axis of the refractive power measurement unit 31L is issued.

Then, according to these instructions, the customer (examinee)
Reference numeral 407 is used to tilt the joystick lever 315b forward, backward, left and right, and to rotate the joystick lever 315b.

At this time, when the joystick lever 315b is tilted left and right, the arithmetic control circuit 315a controls the arithmetic control circuit 400 of the left eye refractive power measuring unit 319L, and the arithmetic control circuit 400 controls the pulse motor 326.
Is controlled to rotate forward and reverse, and the left eye refractive power measurement unit 318 is controlled.
9L is slightly moved left and right from the initial setting position. When the joystick lever 315b is tilted back and forth, the arithmetic and control circuit 315a causes the left-eye refractive power measurement unit 319L to operate.
Of the pulse motor 324
Is controlled to rotate forward and reverse, and the left eye refractive power measurement unit 318 is controlled.
9L is slightly moved back and forth. In addition, Joystick lever 3
When 15b is tilted forward and backward, the arithmetic and control circuit 315a
Is the arithmetic control circuit 4 of the left eye refractive power measurement unit 319L.
00 to control the operation of the Y-direction drive device 320,
The left eye refractive power measurement unit 3189L is slightly moved up and down.

Such an operation is performed by the customer 407 when the display device 4
Perform while watching 06. That is, the joystick lever 315b is used so that the center of the pupil image Ep of the eye to be examined coincides with the image 43a of the collimation scale 43, and the optical axis of the eye to be inspected coincides with the optical axis of the target light receiving optical system 52. The eye refractive power measurement unit 31L is slightly moved back and forth, left and right, and up and down with respect to the eye to be examined.

The fine movement causes the eye refractive power measurement unit 3
The image 43a of the 19L collimation scale 43 is a pupil image Ep of the left eye.
Is within a predetermined range with respect to the center (bright point image), the arithmetic and control circuit 315a converts the coordinates of the eye refractive power measurement unit 319L to the pulse motors 324 and 326 and the Y-direction driving device 320.
, And is stored as coarse left alignment coordinates in the memory 315h.

After this storage, the arithmetic and control circuit 315a gives an instruction to adjust the optical axis of the eye refractive power measurement unit 319R by voice through a speaker (not shown) or by text on the display device 406. In accordance with this instruction, the customer 407 matches the center of the pupil image Ep of the subject's eye with the image 43a of the collimation scale 43 in the same manner as the optical axis alignment of the left eye, and the optical axis of the subject's eye and the target light receiving optical system Using the joystick lever 315b, the eye refracting power measurement unit 319R is slightly moved back and forth, right and left, and up and down so that the optical axis of 52 coincides.

The fine movement causes the eye refractive power measurement unit 3
The image 43a of the collimation scale 43 of the 19R is a pupil image Ep of the right eye.
Is within a predetermined range with respect to the center (bright point image 102a) of the eye refractive power measurement unit 31
The coordinates of 9R are obtained from the driving positions of the pulse motors 324 and 326 and the Y-direction driving device 320, and are stored in the memory 315h as the right rough alignment coordinates.

The arithmetic control circuit 315a obtains the position to the eye to be examined based on the distance measurement signal from the distance measurement means 404 when obtaining such left coarse alignment coordinates and right coarse alignment coordinates. (4) Calculation of Interpupillary Distance Then, the arithmetic and control circuit 315a calculates the left coarse alignment coordinates and the right coarse alignment coordinates stored in the memory 315h and the image 43 of the collimation scale 43 at this time.
The pupil distance PD of the customer 407 is obtained from the coordinates of “a” and the coordinates of the bright spot images of the left and right eyes EL and ER. At this time, the coordinates of the image 43a of the collimation scale 43 and the coordinates of the bright spot images of the left and right eyes EL and ER are determined by the area CCD of the imaging tube (television camera) 38.
Required from. The arithmetic control circuit 315a transmits the interpupillary distance PD to the optometric information center 306 computer 307 via the Internet 310, and processes the glasses or selects a glasses frame as a memory (see FIG. (Not shown). (5) Settings for Eye Refractive Power Measurement The arithmetic and control circuit 315a, which is a CPU, determines the interpupillary distance (distant interpupillary distance) P at the time of distance measurement in this way.
When D is obtained, the intervals and coordinates of the left and right eye refractive power measurement units 319L and 319R corresponding to the interpupillary distance PD in far vision are obtained.

When the interpupillary distance PD at the time of distance measurement is obtained as described above, the arithmetic and control circuit 315a places the fixation target 33 at the near vision position to fixate the eye to be examined. The angle of convergence α of the optical axes O1 and O2 of the subject's eyes EL and ER when the target 33 is fixed (at the time of near vision) (see FIG. 16).
At this time, the pupil distance (near pupil distance) PD, the position where the image of the fixation target (fixation target) is formed at this time, the distance between the left and right eye refractive power measurement units 319L and 319R at this time, and The coordinates are calculated and obtained.

The operation control circuit 315a is connected to the customer 4
When 07 turns on the distance measurement switch 315d, the fixation target 33 is moved to the far vision position by the driving means 33a, and the horizontal rotation devices 318L and 318R are operated and controlled, and the eye refractive power measurement units 319L and 319R are controlled. The target is rotated horizontally in the direction indicated by the arrow 412 to fixate the target.
The convergence angle α of the distance measurement corresponding to the position where the (fixation target) image is formed is set to “0”. That is, the arithmetic control circuit 315
a is set so that the optical axes O1 and O2 of the eyes EL and ER are parallel. On the other hand, the arithmetic control circuit 315a is provided with the arithmetic control circuit 40 of the eye refractive power measurement units 319L and 319R.
The operation of the pulse motors 326 and 326 is controlled by 0 and 400 so that the distance between the left and right eye refractive power measurement units 319L and 319R and the coordinate positions thereof are determined in accordance with the interpupillary distance PD during distance vision. Eye refractive power measurement unit 31
9L and 319R are moved.

The arithmetic and control circuit 315a is connected to the customer 40
7 turns on the near vision measurement switch 315e, moves the fixation target 33 to the near vision position by the driving means 33a, and controls the arithmetic and control circuit 400 to control the pulse motor 326 of the eye refractive power measurement units 319L and 319R. , 3
26 drive control, eye refractive power measurement unit 319L, 31
9R is set to the determined interpupillary distance for near vision. At the same time, the arithmetic control circuit 315 a
L, 318R, and the eye refractive power measurement unit 3
19L and 319R are horizontally rotated in the direction indicated by the arrow 412 to set the convergence angle α in the near measurement corresponding to the position where the image of the fixation target (fixation target) is formed, and set the eye to be examined EL,
Optical axes O1, O2 of ER and eye refractive power measurement unit 319
L, 319R main optical axis OL, OR is half mirror Hm,
Match through Hm. (6) Alignment Data such as the interpupillary distance PD of the subject's eye, the convergence angle α of the subject's eyes EL and ER (see FIG. 16), and the position where the image of the fixation target (fixation target) is formed are displayed. Displayed on device 406.

Thereafter, the joystick lever 315b
Of the eye refractive power measurement units 319L and 319R, the operation control of the pulse motors 324 and 326 and the Y-direction driving device 320 to control the case body 316 back and forth. By finely moving left and right and up and down, the left eye measurement optical system 330
L is roughly aligned within a predetermined range in which auto-alignment is possible with the corneal vertex of the eye to be examined EL (left eye).

When the left-eye measuring optical system 330L falls within a predetermined range in which the left eye measuring optical system 330L can be automatically aligned with the corneal vertex of the eye to be examined EL (left eye), the eye refractive power measuring units 319L and 319R Arithmetic control circuit 4
The operation of the pulse motors 324 and 326 and the Y-direction driving device 320 is controlled by the
L, 319R main optical axis OL, OR is half mirror Hm,
The alignment is completed through Hm.

After the measurement optical systems 330L and 330R are aligned with the corneal apex of the eye to be examined EL (left eye) and ER (right eye), the eyes to be examined EL (left eye) and ER (right eye) are aligned. The main optical axes OL and OR of the measuring optical systems 330L and 330R move slightly.
Is shifted with respect to the optical axes O1 and O2 of the subject eyes EL (left eye) and ER (right eye), the control circuit shown in FIG. 25 controls the pulse motors 324, 326, and the Y-direction driving device 320 as described above. In this way, alignment is always performed in order to control the drive and adjust the displacement between the left and right eyes. (7) Eye Refractive Power Measurement by Objective As described above, the customer 407 only roughly aligns the measurement optical systems 330L and 330R with the eye to be inspected EL (left eye) and the eye to be inspected ER (right eye). The 3330L and 330R are automatically aligned with the eye to be inspected EL (left eye) and the eye to be inspected ER (right eye).

Accordingly, the eye refractive power measuring device 312 is set to the objective eye refractive power measuring mode by the optometric mode selecting switch 31c for selecting the objective or subjective optometric mode, and the position of the fixation target 33 is changed. After being set at the far point, near point, or any position as described above, the measurement optical system 330
While aligning the L and 330R as described above, the fixation target 33 of the measurement optical system 330L and the fixation target 33 of the measurement optical system 330R are placed on the subject's eyes EL and ER via the half mirrors Hm and Hm. By looking at each other, the subject's eye EL, ER is fixed to the fixation target image, and when the measurement optical systems 330L, 330R are aligned, the subject's eye EL (left eye), Eye to be examined
The degree of refraction of the EL (right eye) at the time of distance vision and near vision is automatically and objectively measured. (8) Eye Refraction Measurement by Subject After the customer 307 sets the eye refraction measuring device 312 to the subjective eye refraction measurement mode by the optometry mode selection switch 31c that selects the objective or subjective optometry mode. , Distance measurement switch 315d or near measurement switch 31
When 5e is turned on, the measurement optical systems 3330L and 330R are connected to the subject eye EL (left eye) and the subject eye ER as described above.
(Right eye) is automatically aligned for distance vision or near vision. On the other hand, the arithmetic control circuit 315a causes the liquid crystal display 341 to display an optometry chart via the arithmetic control circuit 400. The optometry chart displayed on the liquid crystal display 341 includes the lenses 34 of the turret disks 342 and 343.
2a, 343a or through-hole (not shown), mirror 345,
The light enters the left eye E via the half mirror 9 and Hm.

Therefore, in this state, the optometry chart of the liquid crystal display 341 is selected in accordance with the purpose of the optometry, and the turret disk 342 is rotationally driven by the driving device 410 to sequentially place the spherical lenses 342a having different refractive powers in the optical path. It is inserted so that the appearance of the optometry chart of the liquid crystal display 341 becomes clear. When there is astigmatism, the turret disk 343 is rotationally driven by the driving device 411 to sequentially insert the cylindrical lenses 343a having different refractive powers into the optical path, and to move the cylindrical lens 343a around the optical axis in the optical path. The liquid crystal display 34 is rotated by the pulse motor 343b to rotate the cylindrical axis of the cylindrical lens 343a.
Make the appearance of the optometry chart clear.

The arithmetic and control circuit 315a obtains the spherical and cylindrical refractive powers of the lenses 342a and 343a inserted in the optical path from the driving amounts of the driving devices 410 and 411, and determines the direction of the cylindrical axis of the lens 343a. The cylindrical lens 343a is obtained from the amount of rotation around the optical axis in the optical path. The amount of rotation can be obtained from the amount of rotation of the pulse motor 343b. This series of operations can be performed by operating the joystick lever 315b, but may be performed by providing a dedicated panel.

At this time, the eye refractive power measurement unit 319
R and 319L are always subjected to auto-alignment, so that even if the face position of the customer (subject) slightly shifts during the subjective optometry, the inspection can proceed without any trouble. (9) Others In the above-described embodiment, the optometry was performed without fixing the face of the customer 407. However, the chin rest and the forehead supporting the face of the customer are fixed on the optometry table 310 in practice. A human sensor (switch) that senses the customer on the forehead
To detect whether the customer has started optometry. In this case, since the position of the customer's face with respect to the optometry apparatus main body 314 is specified, more accurate measurement can be performed.

Further, the chin rest and the forehead rest are set on the optometry table 3.
10 so that the height can be adjusted, and the optometry apparatus main body 31 is attached.
4 can also be used for height adjustment. Further, only the chin rest may be mounted on the optometry table 310 so as to be adjustable in height, and used for adjusting the height with the optometry apparatus main body 314. Alternatively, only the forehead rest can be attached to the optometry table 310 so as to be adjustable in height, and used for height adjustment with the optometry apparatus body 14.

Further, a chin rest is provided in the optometry apparatus main body 314, and a customer who has placed his chin on this chin rest approaches both eyes to the optometry window 402 and looks into the optometry window 402, and performs optometry in this state. You can do so. In this case, the height from the chin to both eyes differs depending on the customer. Therefore, a forehead is provided on the optometry apparatus main body 314, and the forehead is applied to the forehead to allow the customer to bring both eyes close to the optometry window 402 and look into the optometry window 402, and perform optometry in this state. Thus, the position where the forehead hits the forehead rest can be easily changed, and the customer can easily adjust the height of the eye with respect to the optometry window 402, thereby making it easier. Further, the forehead rest and chin rest may be provided in the optometry apparatus main body 314. By adjusting the height of the optometry apparatus main body 314 with respect to the customer's face in this manner, the height of the forehead rest and the chin rest can be easily adjusted to the height of the customer's face, and the forehead rest and the chin rest can be easily adjusted. Can be used smoothly.

Further, the monitor of the customer (for the subject) does not need to be the display device 406 integrated with the optometry apparatus main body 314, and may be a monitor television or a liquid crystal television separate from the optometry apparatus main body 314.

A display device 406 of the customer (for the subject)
The (monitor) is also used to display the operation method before starting the optometry in conjunction with the voice. That is, in this case, when the customer detects entry into the optometry box, or detects that the customer has sat on a chair in the optometry box, and receives this detection signal, the customer is told "chair height" by voice. Please adjust the height "and the height adjustment is OK
Then, a voice message "Press the start button" is issued. In this case, the same content as the ON voice message is displayed on the display device 406.

Further, the height of the face of the customer and the height of the main body of the optometry apparatus 314 can be adjusted based on the image of the customer captured by the television camera 403. That is, the height (vertical position) of the image of the customer's face captured by the television camera 403 is obtained by image processing, and the elevating device 313 is operated by the arithmetic control circuit 315a.
By driving control, the optometry apparatus main body 314 can be driven up and down to a position where the heights of both eyes of the customer match the height of the optometry window 402 of the optometry apparatus main body 314 to perform the alignment. By doing so, it is possible to perform the eye examination without the examiner.

Further, a forehead rest is provided on the optometry apparatus main body 314, and a side camera is provided beside the chair in the optometry box. When it is detected that the customer is seated on the chair in the optometry box, the side camera is used. The height of the customer's face is adjusted with respect to the optometry window 402 of the optometry apparatus main body 31 by obtaining the height of the customer's face by image processing based on the image of the customer and adjusting the height of the chair. In addition, the customer's forehead may be applied to the forehead of the optometry apparatus main body 314. By doing so, it is possible to perform the eye examination without the examiner.

In the above-described optometry, if it is determined from the optometry data of the customer that it is difficult to respond without an examiner, extreme astigmatism, strong astigmatism, extreme spherical power, astigmatism, When the axis is oblique astigmatism, when the corrected visual acuity value is extremely low, or the like, the administrator (operator) of the optometry center 300 remotely controls the eye refractive power measurement device 312 from the center side.

Further, if the optometry is not smooth, or there is no response from the customer, if the red-green test is not performed well, or if there is no response for a predetermined time or more, the administrator of the optometry information center 300 side ( The operator (operator) remotely controls the eye refractive power measuring device 312 from the center side, or the administrator (operator) of the optometric information center 300 determines how to use the eye refractive power measuring device 312 by using a speaker or a display (not shown) of the optometric device main body 314. Device 40
6 to inform the customer. (10) Consulting After the optometry is completed, optometry data based on the optometry is sent from the arithmetic control circuit 315a to the optometry information center 3.
When the data is transmitted to the computer 307 via the Internet 310, the manager at the center consults the customer 407 based on the transmitted optometry data.

In this case, a prescription value of the spectacles is created based on the optometry data, and the prescription value is used as data for selecting the spectacle lens, and the customer and the spectacle lens are selected based on this data. By the way, as for the spectacle lens, the material becomes thinner in the order of low refraction material, medium refraction material, high refraction material,
The price (cost) also increases in this order. Therefore, when the eyesight value of the customer is relatively good, the lens edge thickness does not increase even with a low-refractive-index material of an inexpensive spectacle lens. However, if the eyesight value of the customer is bad and the eyeglasses are quite small, using low-refractive-index eyeglass lenses with low cost will make the edge of the eyeglass lens too thick, and depending on the eyeglass frame, the eyeglasses will not look good from the side . In this case, the use of a spectacle lens made of a high-refractive material, which increases the cost but reduces the edge thickness, can reduce the edge thickness of the eyeglasses so that the appearance is not impaired. The manager at the center consults the customer about the viewpoint of the cost and the appearance of the lens edge thickness, and the customer can refer to the selection of the spectacle lens.

On the center side, a large number of eyeglass frame images are transmitted to the arithmetic and control circuit 315a via the Internet 310 while looking at the face of the customer 407 displayed on the display device 308. The display is displayed on the display device 406 on the side, and consultation of frame selection is performed by voice through a speaker (not shown) provided in the optometry apparatus main body 14 or by text on the display device 406. (11) Synthesis and Selection of Glasses Frame In addition, the image of the customer's face captured by the television camera 403 is transmitted via the Internet 310 to the optometry information processing center 3.
00 to the computer 307 and the computer 30
7 information recording / reproducing device (not shown)
VD) can be selectively combined with the image of the customer's face, and the combination can be easily selected by the customer using the joystick lever 315b of the optometry apparatus main body 314, and the eyeglass frame can be combined with the image. The synthetic image of the face image is returned to the arithmetic and control circuit 315a via the Internet 310,
By displaying the composite image of the returned eyeglass frame and the face image on the display device 406 of the optometry apparatus main body 314, the frame selection may be performed. (Modification) In the embodiment described above, an example is shown in which the optometry apparatus such as the eye refractive power test apparatus 312 arranged in many places is managed by the optometry information center 300 via the Internet 310. It is not necessarily limited to this.

For example, as shown in FIGS. 29 and 30, optometry boxes B1, B2, B3 and the like are arranged at the corners of the optician store 600, and optometry of the eye refractive power inspection device 312 and the like is provided in the optometry boxes B1, B2, and B3. At the same time as installing the equipment,
00, a control room 601 is provided at another corner.
01 is provided with the optometry information processing apparatus 306 described above, and the optometry information processing apparatus 306 and an optometry apparatus such as the eye refraction test apparatus 312 are connected via the intranet 602. Such optometry management and consulting can be performed. (Others) In the above-described embodiment, the example in which the eye-refractive-power measuring units 319R and 319L are provided so as to be rotatable horizontally is shown, but the present invention is not necessarily limited to this. For example, eye refractive power measurement units 319R, 319
L is provided so as to be movable only to the left and right in a facing state, and the left and right half mirrors Hm and Hm can be rotationally driven and controlled by a pulse motor (not shown), so that the optical axes of the eye refractive power measurement units 319R and 319L can be controlled. The direction may be changed.

In this case, when both eyes of the customer are convergence, the actual X, Y, and Z coordinates are calculated from the X, Y, and Z coordinates of the eye refractive power measurement units 319R and 319L while taking this convergence angle into account. A correction value is calculated for the coordinate of Z in accordance with the angle of convergence of the eyes of the customer, and the three-dimensional drive 3
17L and 317R may be drive-controlled.

If the convergence angle is present, the measurement is performed a plurality of times until the convergence angle is reached, and the convergence angle is controlled so as to drive in.

The eye refractive power measuring units 319R, 319R,
The 19L may be configured to always perform auto-tracking (auto-alignment), wait for a response from a customer (subject), and automatically proceed with a self-awareness test in response to the response.

Further, the eye refractive power measurement units 319R, 319R,
19L and an arithmetic and control circuit 315a receiving a response from the subject
Are independent of each other, and transfer of instructions from the arithmetic and control circuit 315a to the eye refractive power measurement units 319R and 319L is performed using communication.

[0097]

As described above, according to the first aspect of the present invention, a left-eye refractive power measuring unit and a right-eye refractive power measuring unit that can be obtained objectively and subjectively are provided. An eye-refractive-power measuring device in which each of the eye-refractive-power measuring units is provided so as to be driven at least to the left and right by independent driving means, wherein each of the eye-refractive-power measuring units is independently rotated horizontally. A rotation unit, and a distance and a measurement optical axis angle between the binocular refraction power measurement units are determined from a driving amount of the eye refraction measurement units to the left and right and a horizontal rotation amount, and the left and right eyes of the subject are calculated from the distances. Is provided with an arithmetic control circuit for calculating the interpupillary distance of the pupil, so that the interpupillary distance when the distance vision is obtained and the pupil distance when the near vision is obtained can be obtained.

In the invention of claim 2, the eye refractive power measuring unit is provided so as to be driven back and forth, left and right, and up and down by a three-dimensional drive mechanism, and is configured to be capable of automatic alignment. Alignment for subjective eye refractive power and objective eye refractive power can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an arrangement of an optometric box in which an optometric apparatus (eye refractive power measuring apparatus) according to the present invention is installed.

FIG. 2 is an explanatory diagram of an optometry system using an optometry apparatus of an optometry box arranged as shown in FIG. 1;

FIG. 3 is a schematic explanatory view of an optometry apparatus installed in the optometry box shown in FIG. 1;

4A is a schematic explanatory view showing the relationship between the optometry box and the optometry apparatus main body of FIG. 1, FIG. 4B is a partially enlarged view of FIG. 4A, and FIG. 4C is a plan view of FIG. .

FIG. 5 is a plan view of a case of the optometry apparatus main body of FIG. 4;

FIG. 6 is a horizontal sectional view of the optometry apparatus main body of FIG. 4;

FIG. 7 is a longitudinal sectional view of the optometry apparatus main body of FIG. 4;

FIG. 8 is a plan view of the three-dimensional table of FIG. 7;

FIG. 9 is a front view of the main body of the optometry apparatus of FIG. 4;

FIG. 10 is an enlarged explanatory view of the display device of FIG. 9;

FIG. 11 is a control circuit diagram of the optometer shown in FIGS. 3 to 10;

FIG. 12 is an operation explanatory view of the display device of FIG. 9;

FIG. 13 is an operation explanatory view of the display device of FIG. 9;

FIG. 14 is an operation explanatory view of the display device of FIG. 9;

FIG. 15 is an operation explanatory view of the display device of FIG. 9;

FIG. 16 is an explanatory diagram showing an optical system of the optometry apparatus shown in FIGS. 3 to 10;

17 is an explanatory diagram of a chopper of the optical system of FIG.

FIG. 18 is an explanatory diagram showing a detection principle of the optical system of FIG.

FIG. 19 is an explanatory diagram showing a detection principle of the optical system of FIG.

FIG. 20 is an explanatory diagram showing a detection principle of the optical system of FIG.

FIG. 21 is an explanatory diagram showing a detection principle of the optical system of FIG.

FIG. 22 is an explanatory diagram showing a detection principle of the optical system of FIG.

FIG. 23 is a front view of a reflected light blocking stop of the optical system of FIG. 16;

FIG. 24 is a front view of a collimation scale of the optical system in FIG. 16;

25 is a block diagram of a control circuit of the optical system of FIG.

26 is an explanatory diagram of an output signal of the two-dimensional light receiving element of the optical system in FIG.

FIG. 27 is a waveform chart of a control circuit of the optical system of FIG.

FIG. 28 is a waveform chart of another control circuit of the optical system in FIG. 16;

FIG. 29 is an explanatory view showing another example of the present invention.

FIG. 30 is an explanatory diagram of wiring in FIG. 29;

[Explanation of symbols]

315a: arithmetic control circuit 317L, 317R: three-dimensional driving device (three-dimensional driving means) 318L, 318R: horizontal rotating device (horizontal rotating means) 319L: left eye refractive power measuring unit 319R ..Right eye refractive power measurement unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Sato 75-1, Hasunumacho, Itabashi-ku, Tokyo Topcon Corporation (72) Inventor Kunihiko Hara 75-1, Hasunumacho, Itabashi-ku, Tokyo Topcon Corporation (72) Inventor Koji Nishio 75-1, Hasunuma-cho, Itabashi-ku, Tokyo Topcon, Inc. (72) Inventor Kazuo Nukawa 75-1, Hasunuma-cho, Itabashi-ku, Tokyo Topcon, Inc. (72) Inventor Takeyuki Kato 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Corporation

Claims (2)

[Claims] 1. A left eye refractive power measuring unit and a right eye refractive power measuring unit which can be determined objectively and subjectively of a subject are provided, and each of the eye refractive power measuring units is independently driven. An eye-refractive-power measuring device provided so as to be able to be driven at least to the left and right by means, wherein horizontal turning means for independently and horizontally turning each of the eye-refractive-power measuring units, and Calculating an interval between the binocular refractive power measurement units and a measurement optical axis angle from the driving amount to the left and right and the horizontal rotation amount, and having an arithmetic control circuit for determining a pupil distance between the left and right eyes of the subject from the interval. Characteristic eye refractive power measurement device. 2. The eye according to claim 1, wherein the eye refractive power measuring unit is provided so as to be driven back and forth, left and right, and up and down by a three-dimensional drive mechanism, and is capable of auto-alignment. Refractive power measuring device.