JP4515605B2 - Eye refractive power measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an eye refractive power measuring apparatus that subjectively and objectively measures the eye refractive power of an eye to be examined.
[0002]
[Prior art]
Conventionally, as an eye refractive power measuring apparatus for measuring the eye refractive power of an eye to be examined, an optometric apparatus as disclosed in Japanese Patent Laid-Open No. 2000-83900 is known. This optometry apparatus is designed to simultaneously and objectively measure the eye refractive power of the subject's left and right eyes, and to determine the distance between the pupils of the subject's left and right eyes. It has become.
[0003]
[Problems to be solved by the invention]
However, in this optometry apparatus, since the obtained interpupillary distance is not used for internal control, the obtained interpupillary distance is not output as data for manufacturing glasses. Met. In addition, this optometry apparatus can determine the interpupillary distance when the left and right eyes are looking far, but cannot measure the interpupillary distance when the left and right eyes are looking at the near vision part. there were.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide an eye refractive power measuring apparatus capable of obtaining the distance between pupils when viewing with distance and near vision.
[0005]
[Means for Solving the Problems]
In order to achieve the first object, the invention of claim 1 is provided with a left eye refractive power measurement unit and a right eye refractive power measurement unit that can be obtained objectively and subjectively, An eye refractive power measurement device in which each eye refractive power measurement unit is provided so that it can be driven at least left and right by independent driving means, and each eye refractive power measurement unit is rotated horizontally independently. The distance between the binocular refractive power measurement units and the measurement optical axis angle are obtained from the moving means and the left and right drive amounts and horizontal rotation amounts of the respective eye refractive power measurement units, and the left and right eyes of the subject are determined from the intervals. An eye refractive power measuring apparatus having an arithmetic control circuit for obtaining the interpupillary distance is provided.
[0006]
Further, the invention according to claim 2 is characterized in that the eye refractive power measurement unit is provided so as to be driven forward / backward / left / right / up / down by a three-dimensional drive mechanism, and is capable of automatic alignment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
In FIG. 1, 300 is an optometry information center, 301 and 302 are buildings such as supermarkets, etc. at locations different from the optometry information center 300, 303 and 304 are buildings such as department stores, and 305 is a building such as a station. Optometrist boxes B1 to B5 are arranged in the corners of these buildings 301 to 305.
[0009]
The optometry information center 300 is provided with an optometry information processing device 306. This optometric information processing apparatus 306 includes a computer (information processing apparatus main body, information processing means) 307 as a center side control means, an operation means 308 such as a keyboard and a mouse of the computer 307, and a number of monitors such as a monitor television and a liquid crystal television. The display device 309 is provided as a center side display device.
[0010]
Further, in the optometry boxes B1 to B5, as shown in FIG. 4A, an optometry table 310 is provided, and a customer chair (examinee chair) 311 is also provided. On the optometry table 310, an eye refracting power measuring device 312 capable of measuring the eye refracting power by the consciousness and the eye refracting power by the other sensation is installed as an optometry device. The eye refractive power measurement device 312 in the optometry boxes B1 to B5 is connected to a computer 307 via the Internet (network) 311.
[Eye refractive power measuring device 312]
As shown in FIGS. 4 to 7 and 9, the eye refractive power measuring device 312 is moved up and down so that the support shaft 313 a is driven up and down using a pulse motor, a hydraulic cylinder, or the like mounted on the optometry table 310. It has an apparatus (vertical drive means) 313, an optometry apparatus main body 314 mounted on a support shaft 313a, and a personal computer main body 315 used for controlling the operation of the elevating apparatus 313 and the optometry apparatus main body 314. The personal computer main body 315 incorporates a calculation control circuit 315a shown in FIG. 11, and a joystick lever 315b is connected to the calculation control circuit 315a as a measurement operation means and a drive operation means.
[0011]
Further, the personal computer main body 315 is provided with measurement mode changeover switches such as an optometry mode selection switch 31c, a distance measurement switch 315d, and a near measurement switch 315e as measurement operation means for selecting an objective or subjective optometry mode. ing. Signals from the switches 315c to 315e are input to the arithmetic control circuit 315a, and an operation signal for the joystick lever 315b is also input to the arithmetic control circuit 315a. Further, the personal computer main body 315 is provided with a switch 315f for operating the lifting device 313 to raise the optometry device main body 314 and a switch 315g for operating the lifting device 313 to lower the optometry device main body 314 as drive operation means. Yes. The signals from the switches 315f and 315g are also input to the arithmetic control circuit 315a. When the arithmetic control circuit 315a receives the ON signal from the switch 315f, the arithmetic control circuit 315a operates the lifting device 313 to raise the optometry apparatus main body 314. When receiving the ON signal from the switch 315g, the arithmetic control circuit 315a operates the lifting device 313. The optometry apparatus main body 314 is lowered.
[0012]
The optometry apparatus main body 314 includes a case main body 316, a pair of three-dimensional drive devices (three-dimensional drive mechanisms) 317L and 317R disposed on the left and right sides of the case main body 316, and a three-dimensional drive device that is a three-dimensional drive means. Horizontal rotation devices (horizontal rotation drive devices) 318L and 318R respectively disposed on 317L and 317R, and left eye refractive power measurement unit 319L and right eye refractive power measurement respectively disposed on the horizontal rotation devices 318L and 318R. A unit 319R is included.
[0013]
Each of these eye refractive power measurement units 319L and 319 has a calculation control circuit 400, and this calculation control circuit 400 has a position detection circuit 401 shown in FIG.
[0014]
Further, an optometry window 402 is formed at the upper center of the front surface of the case body 316, and a wide-angle TV camera (imaging means) 403 is attached to the upper center of the front center of the case body 316 so as to be positioned above the optometry window 402. Yes. Further, the case main body 316 is positioned between the left eye refractive power measurement unit 319L and the right eye refractive power measurement unit 319R, that is, positioned at the center upper portion of the optometry window 402 and the distance to the subject's face. A distance measuring means (ranging sensor) 404 for measuring is attached. Further, a human sensor 405 using infrared rays is attached to the lower front center of the case main body 316, and a display device 406 such as a liquid crystal display is attached to the lower front center of the case main body 316 as a display device side display device. It has been.
[0015]
The distance measuring means 404 measures the distance to the face of the customer 407 sitting on the customer chair (subject chair) 311 and inputs it to the arithmetic control circuit 315a. The human sensor 405 senses the customer 407 sitting on the customer chair (subject chair) 311 and inputs a sensing signal to the arithmetic control circuit 315a.
[0016]
Further, an image 408a of the face 408 taken by the TV camera 403 is displayed on the upper right portion of the display device 406 via the arithmetic control circuit 315a, and the left and right portions of the display device 406 have eye refractive power measurement units 319L and 319R. Anterior eye images 409L and 409R of a subject imaged by imaging tubes (television cameras) 38 and 38, which will be described later, are projected via arithmetic control circuits 400, 400 and 315a.
<Three-dimensional drive device>
The three-dimensional drive devices (three-dimensional drive means) 317L and 317R are provided at the upper end of the support shaft 320a and the Y (vertical) direction drive device 320 that drives the support shaft 320a up and down using a pulse motor, a hydraulic cylinder, or the like. The attached Y (vertical) direction moving table 321, the Z (front / rear) moving table 322 mounted on the Y table 320 a so as to be movable in the Z (front / rear) direction, and the X (left / right) moved on the Z direction moving table 322. And an X (left / right) direction moving table 323 attached to be movable in the direction).
[0017]
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 325 that is rotationally driven by the pulse motor 324. It can be driven forward and backward in the (front-rear) direction. The X-direction moving table 323 is driven to move forward and backward in the X (left and right) direction by a pulse motor 326 attached to the Z-direction moving table 322 and a feed screw 327 that is rotationally driven by the pulse motor 326. .
[0018]
The Y direction driving device 320 and the pulse motors 324 and 326 are controlled by the position detection circuit 401 of the arithmetic control circuit 400 as will be described later.
<Horizontal rotation device>
Further, the horizontal rotation devices (horizontal rotation means) 318L and 318R are fixed to the center of the upper surface of the three-dimensional drive devices 317L and 317R. The horizontal rotating devices 318L and 318R have rotating shafts 318 and 318 that are driven to rotate about a vertical axis by a pulse motor or the like. The left eye refractive power measurement unit 319L and the right eye refractive power measurement unit 319R are fixed to the rotation shafts 318 and 318 of the horizontal rotation devices 318L and 318R.
<Eye refractive power measurement unit>
The left eye refractive power measurement unit 319L and the right eye refractive power measurement unit 319R have substantially the same configuration except that a part thereof is omitted, so 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
As shown in FIG. 16, the measurement optical system of the left eye refractive power measurement unit 319L accommodates an objective left eye refractive power measurement optical system 330L and a subjective eye refractive power measurement optical system 340L. A case (housing) 350L.
(Objective optical power measurement system 330L for the left eye)
The objective left-eye refractive power measurement optical system 330L includes an eye position detection system 50, a target projection optical system 51 that projects the measurement target onto the fundus of the eye, and a two-dimensional detector that detects the amount of deviation of the measurement target image. 52, a target light receiving optical system 53 for projecting a measurement target image of the fundus of the eye to be examined on the two-dimensional detector 52, a fixation target system 54 for fixing the collimation axis of the eye to be examined, and the eye ER (left eye) The sighting optical system 55 is displayed.
[0019]
In the eye position detection system 50, the light emitting element 102, the projection lens 104, the first half mirror 106, and the second half mirror 108 are arranged on the reflection optical axis of the second half mirror 108 as shown in FIG. Further, the imaging lens 109, the chopper 110, and the two-dimensional light receiving element 112 are disposed on the reflected optical axis of the first half mirror 106.
[0020]
Further, a reference signal light emitting element 113 is disposed on one side of the chopper 110, and a reference signal light receiving element 114 is disposed on the other side. The light emitting element 102 and the light receiving element 112 are a midpoint C (focal position when the cornea is convex), a projection lens 104 and an imaging lens 109, of the corneal apex and the corneal curvature center of the eye to be examined EL (left eye). Is conjugated.
[0021]
That is, when the eye to be examined EL (left eye) is in an appropriate position, the reflected light beam from the cornea of the eye to be examined becomes a parallel light beam, and an image of the light emitting element 102 is formed on the light receiving element 112 as a bright spot image 102a by the imaging lens 109. Is done. As shown in FIG. 17, the chopper 110 is constituted by a disk having a plurality of sector slits 115, and rotates around the disk center 116. The optical axis 118 passes through the approximate center of the fan slit 115.
[0022]
The diaphragm 119 is used to make the amount of light incident on the light receiving element 112 constant, and is a diaphragm having an opening twice that of the sector slit 115. A light beam 120 in the fan-shaped slit 115 is a substantially circumscribed circle of the opening of the diaphragm 119.
[0023]
The detection principle of the eye position detection system 50 in the above configuration is as follows. When the imaging point (122) by the imaging lens 109 is behind the light receiving element 112 (on the opposite side to the imaging lens 109), when the chopper 110 rotates, as shown in FIGS. As 115 gradually passes through the light beam of the imaging lens, a light beam as shown in FIGS. 19A, 19B and 19C is incident on the light receiving element 112. In FIG. 19, X indicates the passing position of the optical axis, and O indicates the position of 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 the solid line in FIG. In FIG. 20, the horizontal axis indicates the position of the chopper, and the vertical axis indicates the coordinates in the Y direction.
[0024]
Further, when the imaging point (122) by the imaging lens 109 is in front of the light receiving element 112 (on the imaging lens 109 side), the chopper 110 is rotated as shown in FIGS. 21 and 22 correspond to FIGS. 18 and 19, respectively. The detection signal of the light receiving element 112 at this time is as indicated by a dotted line in FIG.
[0025]
Furthermore, when the image forming point by 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 one-dot chain line in FIG.
[0026]
That is, the detection signal of the light receiving element 112 detects where the imaging point is in the front-rear direction of the light receiving element, in other words, how much the corneal vertex of the eye to be examined is deviated from the predetermined position in the front-rear direction. can do. At the same time, by detecting the coordinates of the average incident position on the light receiving element 112, it is possible to detect how much the corneal apex position of the eye to be examined is deviated in a vertical direction and a horizontal direction with respect to a predetermined appropriate position. . In this 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 vertex of the cornea or the center of corneal curvature of the eye to be examined.
[0027]
As shown in FIG. 16, the target projection optical system 51 includes a pair of infrared light sources 1a and 1b disposed around the optical axis, and condensing lenses 2a and 2b for condensing light from the infrared light sources 1a and 1b, respectively. , Collimator lens 3 for creating parallel light, measurement target 5 with circular aperture stop 4, imaging lens 6, imaging lens 7 for projection, half mirror 8 for infrared light, and infrared light in the long wavelength part is reflected and visible And a half mirror Hm supported by a case 350L with a support arm 351. The dichroic mirror 9 has a characteristic of transmitting a portion and infrared light adjacent thereto.
[0028]
The pair of infrared light sources 1a and 1b are alternately lit at a high speed, and the light sources 1a and 1b are configured to be rotatable around the light source as a unit. Further, in the above configuration, the light from the pair of infrared light sources 1a and 1b is condensed by the condenser lenses 2a and 2b, respectively, and further collimated by the collimator lens 3 and obliquely incident on the circular aperture stop 4. . The light that has passed through the circular aperture stop 4 is imaged at the position P1 by the imaging lens 6, and is then passed through the projection imaging lens 7, the half mirror 8, the dichroic mirror 9, and the half mirror Hm. Incident to the left eye).
[0029]
Here, the images of the infrared light sources 1a and 1b are formed at the pupil position of the subject eye EL (left eye), and the image of the circular aperture stop 4 of the measurement target 5 is formed on the fundus P2 of the subject eye. 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 light from the infrared light source 1b The image of the circular aperture stop 4 illuminated by is formed at the same position on the fundus P2. On the other hand, when the measurement target 5 and the fundus P2 of the eye to be examined EL (left eye) are not in a conjugate positional relationship, the four circular aperture stops illuminated by the light from the infrared light source are located at two separated locations on the fundus P2. Each forms an image.
[0030]
As shown in FIG. 16, the target light receiving optical system 53 has a corneal reflection disposed at a position conjugate with the eye cornea 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 light blocking diaphragm 12 and the relay lens 13 are included.
[0031]
As shown in FIG. 23, the corneal reflection light blocking diaphragm 12 is a diaphragm having a substantially circular hole and projecting light-shielding portions 12a and 12b at two target positions with respect to the optical axis passing position. The corneal reflection light blocking diaphragm 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 reflection light blocking diaphragm 12 is disposed at the front focal position of the relay lens 13, and the projection optical system by the relay lens 13 is similar to the telecentric optical system.
[0032]
In the above configuration, the measurement target image of the fundus P2 to be examined is projected onto the two-dimensional detector 52 by the half mirror Hm, the dichroic mirror 9, the half mirror, the light receiving objective lens 10, the mirror 11, and the relay lens 13.
[0033]
At this time, harmful reflected light from the eye cornea to be examined is removed by the protruding light shielding portions 12a and 12b of the reflected light blocking diaphragm 12. Further, since the corneal reflection light blocking diaphragm 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. The center position of the circular hole image, which is the measurement target image, does not displace before and after the imaging position.
[0034]
The two-dimensional detector 52 discriminates whether the image of the circular aperture stop 4 on the fundus of the eye to be examined matches or separates by alternately lighting the infrared light sources 1a and 1b, and measures the separation distance when the images are separated. From this measurement value, the eye refractive power in the meridian direction in which the infrared light sources 1a and 1b are arranged is calculated by a known arithmetic circuit.
[0035]
As shown in FIG. 16, the fixation target system 54 includes a visible light source 31, a condensing lens 32, a fixation target 33 movable in the light source direction, a mirror 34, a projection lens 35, and reflects infrared light to reflect infrared light. It is composed of a dichroic mirror 36 that transmits.
[0036]
In the above configuration, the light from the visible light source 31 illuminates the fixation target 33 via the condenser lens 32. Light from the fixation target 33 passes through the mirror 34, the projection lens 35, and the dichroic mirror 36, and further passes through the half mirror 9 and the half mirror Hm, and is projected onto the eye to be examined (left eye). The subject fixes the collimation direction by gazing at the fixation target 33.
[0037]
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 imaging tube (anterior eye image difference imagining means) 38 on the same optical axis. A light source 40, a condenser lens 41, a collimation plate 42, a mirror 44, and a projection lens 45 are arranged on the reflection optical axis of the half mirror 37. The imaging tube 38 is connected to the display device 406 via the arithmetic control circuit 400. As shown in FIG. 24, the collimation plate 42 has a collimation scale having a circle at the center and a radial aperture around the center.
[0038]
In the aiming optical system configured as described above, the imaging tube 38 has an anterior eye part image 409L of the eye to be examined EL (left eye) by the projection lens 36 'and an image 43a of the collimation scale 43 by the projection lens 45. It is projected again. The customer 407 looks at the display device 406, the center of the pupil image Ep of the eye to be examined and the image 43a of the collimation scale 43 match, and the optical axis of the eye to be examined and the optical axis of the target light receiving optical system 52 match. As described above, the present apparatus is moved vertically and horizontally with respect to the eye to be examined using the joystick lever 315b.
[0039]
In the above configuration and operation, the eye refractive power in at least three meridian directions is measured, and the refractive power, astigmatism, and astigmatism direction of the eye to be examined are obtained from the measured values.
[0040]
Next, an electric circuit that moves the autorefractometer main body according to the signal detected by the two-dimensional light receiving element 112 of the eye detection system 50 and makes the relative positional relationship between the eye to be examined and the autorefractometer appropriate, This will be described with reference to FIG. As shown in FIG. 26, when the light beam 100 is incident, the light receiving element 112 has a distance x related to the coordinates of the incident position. ₁ , x ₂ , y ₁ , y ₂ Voltage X corresponding to ₁ , X ₂ , Y ₁ , Y ₂ Is output. When the light beam 100 enters the center of the light receiving element 112, X ₁ = X ₂ , Y ₁ = Y ₂ It becomes. In this embodiment, the light beam is scanned in the Y direction by the rotation of the chopper 110.
[0041]
First, a circuit for detecting and adjusting a deviation in the X direction, that is, the horizontal direction will be described. X of light receiving element 112 ₁ Output terminal, X ₂ The output terminals are input to the amplifier circuits 200 and 201, respectively. ₁ −X ₂ ) Subtracting circuit 202 and (X ₁ + X ₂ ) Is calculated. The subtraction circuit 202 and the addition circuit 204 are (X ₁ −X ₂ ) / (X ₁ + X ₂ ) Is calculated. The division circuit 206 is (X ₁ −X ₂ ) / (X ₁ + X ₂ ) Is connected to a pulse motor 326 via a direction discriminating circuit 208 and a driver 210 for judging the positive / negative.
[0042]
In the above circuit, since the scanning by the chopper 110 is performed in the Y direction, the signal X indicating the average position of the light beam 100 regardless of the shift amount of the eye to be examined. ₁ , X ₂ Is output at a constant level as long as the amount of light incident on the light receiving element 112 does not change. Output signal X of light receiving element 112 ₁ , X ₂ Are amplified by the amplification circuits 200 and 201, respectively, and the subtraction circuit 202 and the addition circuit 204 perform the respective operations (X ₁ −X ₂ ) And (X ₁ + X ₂ ) Is made.
[0043]
The outputs of the arithmetic circuit 202 and the adder circuit 204 are (X ₁ −X ₂ ) / (X ₁ + X ₂ ) Is calculated so that a voltage signal at a certain level corresponding to the incident coordinate position can be obtained even if the amount of incident light on the light receiving element 112 varies. (X ₁ −X ₂ ) / (X ₁ + X ₂ ) = The absolute value of the X value indicates the amount of deviation of the eye to be examined in the X direction. The output of the dividing circuit 206 is input to the direction discriminating circuit 208, and the sign of X is determined. The sign of X indicates the direction of deviation in the X direction. The driver 210 drives the pulse motor 326 based on the positive / negative discrimination of X, and adjusts the positional deviation in the X direction (left / right direction).
[0044]
Next, a circuit for detecting and adjusting a deviation in the Y direction, that is, the vertical direction will be described. Since the scanning by the 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.
[0045]
Here, as shown in the explanation of the principle of the eye position detection system 50, the voltage signals Y1 and Y2 include information on the position in the Z direction, that is, the front-rear direction (optical axis direction) of the refractometer. , Signal Y ₁ (Z ₁ ), Y ₂ (Z ₂ ). Y of light receiving element 112 ₁ (Z ₁ ), Y ₂ (Z ₂ ) Is connected to the subtraction circuit 222 and the addition circuit 224 via the amplification circuits 220 and 221 of the position detection circuit 401 of FIG. The subtraction circuit 222 of the position detection circuit 401 is connected to the division circuit 228 via the low-pass filter circuit 226, and the addition circuit 224 is directly connected to the division circuit 228. The division circuit 228 is connected to a Y-direction drive device 320 such as a pulse motor through a direction discrimination circuit 230 and a driver 232 in the same manner as the X-direction circuit.
[0046]
The operation in the above circuit is the same as that of the circuit in the X direction except that the low-pass filter circuit 226 makes a voltage signal of a certain level from the output signal from the subtraction circuit 222 by the influence of the modulation component, that is, the signals Z1 and Z2. It is the same as the operation and (Y ₁ −Y ₂ ) / (Y ₁ + Y ₂ ) Is discriminated, and a driver 232 drives a Y-direction drive device 320 such as a pulse motor to adjust a deviation in the Y direction (vertical direction).
[0047]
Next, an electric circuit that detects and adjusts a shift in the Z direction (front-rear direction) will be described. The subtraction circuit 222 and the addition circuit 224 in the circuit related to the Y direction are directly connected to the division circuit 242. The division circuit 242 is connected to the pulse motor 324 through a band-pass filter circuit 244, a synchronous rectifier circuit 246, a low-pass filter circuit 248, a direction discrimination circuit 250, and a driver 252. The reference signal detection element 114 is connected to the synchronous rectifier circuit 246 via the amplifier circuit 260. In the above circuit, the division circuit 242 ₁ (Z ₁ ) −Y ₂ (Z ₂ ) / Y ₁ (Z ₁ ) + Y ₂ (Z ₂ ) And is input to the bandpass filter circuit 244. The output from the bandpass filter circuit 244 outputs a modulated wave having an amplitude proportional to the amount of deviation in the Z direction. As shown in FIGS. 27A and 27B, this modulated wave becomes a signal having a different phase depending on the direction of deviation. On the other hand, the output of the reference signal detection element 114 is amplified by the amplifier circuit 260, and the rectangular-wave reference signal shown in FIG. 27C 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 of FIG. 27D or FIG. 27E depending on the direction of deviation. The output from the synchronous rectification circuit 246 is converted into the signal of FIG. 27F or G by the low-pass filter circuit 248 and input to the direction discrimination circuit 250. The signal input to the direction discriminating circuit 250 is discriminated between positive and negative, and this signal is input to the driver 252 as a signal in the direction of deviation to drive the pulse motor 324.
[0048]
In the above circuit processing, the light emitting element 102 is DC-lit, but when AC is lit (for the purpose of improving S / N), a signal can be similarly obtained by adding a few circuits.
[0049]
Further, when detecting the amount of displacement and the direction of displacement 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.
[0050]
Furthermore, in the above embodiment, the chopper 110 of the eye position detection system is arranged on the light receiving side, but it can be arranged between the light emitting element 102 on the light emitting side and the projection lens 104.
(Conscious eye optical power measurement optical system 340L)
The subjective eye refractive power measurement optical system 340L has a refractive power different from that of a liquid crystal display (display means) 341 for displaying an optometry chart for other subjective optometry such as a Landolt ring and a chart for red / green test. A turret disk for a spherical lens in which a large number of spherical lenses 342a are arranged and held in the circumferential direction, and a turret circle for a cylindrical lens in which a large number of cylindrical lenses 343a having different cylindrical powers and adjustable axial angles are arranged and held in the circumferential direction. A plate 343, a mirror 344, a relay lens 345, a half mirror 346 disposed between the half mirrors 9 and 108, and the half mirrors 9 and Hm are provided. The turret disks 342 and 343 are also provided with through holes (not shown) without the lenses 342a and 343a.
[0051]
Further, the left eye refractive power optometry unit 319L includes an arithmetic control circuit 400 shown in FIG. The arithmetic control circuit 400 includes a spherical lens turret driving device 411 that rotationally drives the spherical lens turret disc 342, a cylindrical lens turret driving device 412 that rotationally drives the cylindrical lens turret disc 343, and a liquid crystal display 341. Is connected.
[0052]
Then, when the customer 307 turns on the distance measurement switch 315d for the subjective optometry mode and the near measurement switch 315e for the subjective optometry, the calculation control circuit 315a turns on the liquid crystal display 341 via the calculation control circuit 400. Display the optometry chart. At this time, when the distance measurement switch 315d is turned on, the arithmetic and 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 the left and right direction. . When the near measurement switch 315e is turned on, the arithmetic and control circuit 400 controls the operation of the horizontal rotation device 318L so that the left eye refractive power optometry unit 319L is set by a predetermined amount (set amount) as indicated by an arrow 412. While rotating horizontally, the pulse motor 326 is operated to move the left eye refractive power optometry unit 319L to the right eye refractive power optometry unit 319R side by a predetermined amount (set amount).
[0053]
Further, the optometry chart displayed on the liquid crystal display 341 includes the lenses 342a and 343a of the turret discs 342 and 343 or through holes (not shown), the mirror 345, the half mirror 9, and the left eye to be examined EL. Is incident on.
(B) Measurement optical system of right eye refractive power measurement unit 319R and its control system
As shown in FIG. 16, the measurement optical system of the right eye refractive power measurement unit 319R accommodates an objective left eye refractive power measurement optical system 330R and a subjective eye refractive power measurement optical system 340R. A case (housing) 350R.
[0054]
Since the measurement optical system 330R of the right eye refractive power measurement unit 319R is exactly the same as the measurement optical system 330L of the left eye refractive power measurement unit 319L, description thereof is omitted.
[0055]
Next, the use state of the ocular refractive power test apparatus having such a configuration will be described.
(1) Customer perception
When the customer 407 sits on the chair 311, the human sensor 405 senses this, and this sensed signal is input to the arithmetic control circuit 315 a. As a result, the arithmetic control circuit 315a turns on the eye refractive power measurement device 314, which is an optometry device, and transmits a sensing signal to the computer (optometry information processing device) 307 of the optometry information center 306 via the Internet 310.
[0056]
As a result, the computer 307 of the optometry information center 306 informs the administrator in the center with a buzzer (not shown) to that effect, or informs the display device 309 of characters, graphics (icons), a rotating lamp, and an LED. Inform the center manager by flashing and so on.
[0057]
The arithmetic control circuit 315a obtains information from the forehead detection sensor 404 whether or not the customer (subject) face has been set at a predetermined position with respect to the optometry apparatus main body 314.
(2) Vertical coarse alignment of the optometry apparatus main body 314
When the eye refractive power measuring device 314 is turned on, the arithmetic and control circuit 315a takes the image of the face 408 of the customer 407, and the captured face image 408a is shown in FIGS. 15 are displayed on the upper right part 406a of the display device 406. Further, the arithmetic control circuit 315a displays the anterior segment images 409L and 409R of the customer 407 captured by the imaging tubes (television cameras) 38 and 38 of the eye refractive power measurement units 319L and 319R on the left and right sides of the display device. The information is displayed on the parts 406b and 406c.
[0058]
Incidentally, since the optometry window 402 of the optometry apparatus main body 314 and the eye height of the customer 407 do not match, the face image 408a displayed on the display unit 406a is positioned downward as shown in FIG. 12, and the lower part of the image 408a is below. In the case of lack, the imaging tubes (television cameras) 38 and 38 of the eye refractive power measurement units 319L and 319R do not image the anterior segment of the customer 407, and thus the anterior segment image 409L is displayed on the display device 406. , 409R are not displayed.
[0059]
In this case, the switch 315g is turned on. Thereby, the arithmetic control circuit 315a operates the lifting device 313 to lower the optometry apparatus main body 314. By this driving, the television camera 403 is also lowered, and the face image 308a is displayed on the display unit 406a at the upper right part of the display device 406 so as to be accommodated as shown in FIG. When the hand is released from the switch 315g at this position, the arithmetic control circuit 315a stops the lifting device 313. As a result of this operation, when the optometry window 402 of the optometry apparatus main body 314 and the eye height of the customer 407 are matched, the image of the customer 407 captured by the imaging tubes (TV cameras) 38 and 38 of the eye refractive power measurement units 319L and 319R is obtained. The anterior segment images 409L and 409R are displayed on the display device 406, and the rough alignment is completed.
[0060]
Conversely, even when the upper portion of the image 408a displayed on the display unit 406a is missing, the eye refractive power measurement unit 319L does not match the eye height of the optometry window 402 of the optometry apparatus main body 314 and the customer 407. , 319R imaging tubes (television cameras) 38, 38 do not image the anterior segment of the customer's 407, the anterior segment image 409L, 409R is not displayed on the display device 406. In this case, the switch 315f is turned on to operate the elevating device 313 to raise the optometry apparatus main body 314, and the face image 308a is shown on the display unit 406a in the upper right part of the display device 406 as shown in FIG. So that it fits. As a result of this operation, when the optometry window 402 of the optometry apparatus main body 314 and the eye height of the customer 407 are matched, the image of the customer 407 captured by the imaging tubes (TV cameras) 38 and 38 of the eye refractive power measurement units 319L and 319R is obtained. Anterior eye images 409L and 409R are displayed on the display device 406.
[0061]
When the customer 407 cannot perform such an operation, the administrator of the optometry information center 306 remotely operates the eye refraction measurement device 312 via the computer 307 and the Internet 310 and uses a speaker (not shown) of the eye refraction measurement device 312. The customer 407n is notified of the usage or the usage is displayed on the display device 406. If the operating method is still unknown, the administrator of the optometry information center 306 remotely operates the eye refraction measurement device 312 via the computer 307 and the Internet 310 to thereby operate the optometry device main body of the eye refraction measurement device 312. As described above, the vertical movement is adjusted so that the eyes of the face of the customer 407 are aligned with the optometry window 402.
[0062]
The administrator of the optometry information center 306 performs the optometry by remotely operating the eye refraction measuring device 312 even when the customer 407 does not know the optometry method described below.
(3) Coarse alignment of left and right eyes
In the state where the above rough alignment is completed, the imaging tube 38 includes an anterior eye image 409L of the eye to be examined EL (left eye) by the projection lens 36 ′ and an image 43a of the collimation scale 43 by the projection lens 45. Are projected on top of each other. In this state, the interval between the eye refractive power measurement units 319L and 319R is initially set so as to match the distance between pupils of a standard person.
[0063]
In this state, the arithmetic control circuit 315a instructs the customer 407 to adjust the optical axes of the left and right eye refractive power measurement units 319L and 319R by voice or a character on the display device 406 via a speaker (not shown).
[0064]
In this case, the arithmetic control circuit 315a controls the arithmetic control circuit 400 to horizontally rotate the eye refractive power measurement units 319L and 319R in the direction of the arrow 412 by the horizontal rotation device 320, so that the optical axes of the eyes EL and ER to be inspected. While setting O1 and O2 to be parallel, the customer 407 is prompted to move the fixation target 33 to the far vision position by the driving means 33a and fix the fixation target 33 to the customer's left eye. Instructs the optical axis alignment of the eye refractive power measurement unit 31L.
[0065]
In accordance with this instruction, the customer (subject) 407 tilts the joystick lever 315b back and forth and right and left and rotates the joystick lever 315b.
[0066]
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 measurement unit 319L, and the arithmetic control circuit 400 rotates the pulse motor 326 in the normal direction. By performing reverse rotation control, the left eye refractive power measurement unit 3189L is slightly moved left and right from the initial setting position. When the joystick lever 315b is tilted back and forth, the arithmetic control circuit 315a controls the arithmetic control circuit 400 of the left eye refractive power measurement unit 319L to control the pulse motor 324 forward / reversely, and to the left The eye refractive power measurement unit 3189L is slightly moved back and forth. Further, when the joystick lever 315b is tilted back and forth, the calculation control circuit 315a controls the calculation control circuit 400 of the left eye refractive power measurement unit 319L to control the operation of the Y-direction driving device 320, and the left eye refraction. The force measuring unit 3189L is finely moved up and down.
[0067]
Such an operation is performed while the customer 407 looks at the display device 406. That is, the joystick lever 315b is used so that the center of the pupil image Ep of the eye to be examined and the image 43a of the collimation scale 43 coincide, and the optical axis of the eye to be examined coincides with the optical axis of the target light receiving optical system 52. Then, 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.
[0068]
When the image 43a of the collimation scale 43 of the eye refractive power measurement unit 319L falls within a predetermined range with respect to the center (bright spot image) of the pupil image Ep of the left eye by this fine movement, the arithmetic control circuit 315a causes the eye refractive power. The coordinates of the measurement unit 319L are obtained from the drive positions of the pulse motors 324 and 326 and the Y-direction drive device 320, and are stored as left coarse alignment coordinates in the memory 315h.
[0069]
After the storage, the arithmetic control circuit 315a gives an instruction for optical axis alignment of the eye refractive power measurement unit 319R by voice or text on the display device 406 via a speaker (not shown). According to this instruction, the customer 407 matches the center of the pupil image Ep of the eye to be examined and 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 eye to be examined and the target light receiving optical system Using the joystick lever 315b, the eye refractive power measurement unit 319R is slightly moved back and forth, left and right, and up and down using the joystick lever 315b so that the optical axes of 52 coincide.
[0070]
When the image 43a of the collimation scale 43 of the eye refractive power measurement unit 319R enters a predetermined range with respect to the center of the pupil image Ep of the right eye (bright spot image 102a) by this fine movement, the arithmetic control circuit 315a causes the eye refraction. The coordinates of the force measuring unit 319R are obtained from the driving positions of the pulse motors 324 and 326 and the Y-direction driving device 320, and stored in the memory 315h as the right coarse alignment coordinates.
[0071]
The arithmetic control circuit 315a obtains the position to the eye to be examined based on the distance measurement signal from the distance measuring means 404 when obtaining such left coarse alignment coordinates and right coarse alignment coordinates.
(4) Calculation of interpupillary distance
The arithmetic control circuit 315a then stores the left coarse alignment coordinates and right coarse alignment coordinates stored in the memory 315h in this way, and the coordinates of the image 43a of the collimation scale 43 and the brightness of the left and right eyes EL and ER. The inter-pupil distance PD of the customer 407 is obtained from the coordinates of the point image. 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 obtained from the area CCD of the imaging tube (television camera) 38. Then, the arithmetic control circuit 315a transmits this interpupillary distance PD to the optometry information center 306 computer 307 via the Internet 310 to process the glasses or select the memory of the computer 307 as data when selecting the glasses frame (see FIG. (Not shown).
(5) Settings for eye refractive power measurement
Then, the arithmetic control circuit 315a, which is a CPU, determines the interpupillary distance (distance between pupils) PD during distance measurement in this way, the right and left corresponding to the interpupillary distance PD during distance vision. The distance and coordinates of the eye refractive power measurement units 319L and 319R are obtained.
[0072]
Further, when the interpupillary distance PD during distance measurement is obtained as described above, the arithmetic control circuit 315a places the fixation target 33 at the near vision position and places the fixation target 33 on the eye to be examined. Convergence angle α (see FIG. 16) of optical axes O1 and O2 of the subject's eyes EL and ER when fixation (near vision), interpupillary distance (distance between near pupils) PD at this time, The position at which the image of the fixation target (fixation target) is formed, the distance between the left and right eye refractive power measurement units 319L and 319R and the coordinates thereof are calculated.
[0073]
Then, when the customer 407 turns on the distance measurement switch 315d, the arithmetic control circuit 315a moves the fixation target 33 to the far vision position by the driving means 33a and controls the horizontal rotation devices 318L and 318R, The eye refractive power measurement units 319L and 319R are horizontally rotated in the direction indicated by the arrow 412 so that the distance measurement convergence angle α corresponding to the position where the image of the fixation target (fixation target) is formed is “0”. Set. That is, the arithmetic control circuit 315a sets so that the optical axes O1 and O2 of the eye to be examined EL and ER are parallel. On the other hand, the arithmetic control circuit 315a controls the operation of the pulse motors 326 and 326 by the arithmetic control circuits 400 and 400 of the eye refractive power measurement units 319L and 319R, and obtains it corresponding to the inter-pupil distance PD during distance vision. The eye refractive power measurement units 319L and 319R are moved so that the distance between the left and right eye refractive power measurement units 319L and 319R and the coordinate position thereof are the same.
[0074]
In addition, when the customer 407 turns on the near vision measurement switch 315e, the arithmetic control circuit 315a moves the fixation target 33 to the near vision position by the driving unit 33a and controls the arithmetic control circuit 400 to adjust the eye refractive power. The pulse motors 326 and 326 of the measurement units 319L and 319R are driven and controlled to set the interpupillary distance for near vision obtained by the eye refractive power measurement units 319L and 319R. At the same time, the arithmetic control circuit 315a controls the horizontal rotation devices 318L and 318R to horizontally rotate the eye refractive power measurement units 319L and 319R in the direction indicated by the arrow 412 to fix the fixation target (fixation target). Is set to the convergence angle α of the near-field measurement corresponding to the position where the image of the eye is formed, and the optical axes O1, O2 of the subject's eyes EL, ER and the main optical axes OL, OR of the eye refractive power measuring units 319L, 319R are Match with each other through the half mirrors Hm and Hm.
(6) Alignment
The display device 406 displays data such as the inter-pupillary distance PD, the convergence angle α (see FIG. 16) of the eye to be examined EL, and the position where the fixation target (fixation target) image is formed. Is done.
[0075]
Thereafter, by tilting the joystick lever 315b back and forth and right and left and rotating it, the arithmetic control circuit 400 of the eye refractive power measurement units 319L and 319R controls the operation of the pulse motors 324 and 326 and the Y-direction drive device 320. Then, the case body 316 is finely moved back and forth, right and left and up and down to roughly align the left eye measurement optical system 330L within a predetermined range in which auto-alignment can be performed with respect to the corneal apex of the eye to be examined EL (left eye).
[0076]
The arithmetic control circuit 315a controls the arithmetic operation of the eye refractive power measurement units 319L and 319R when the left eye measurement optical system 330L falls within a predetermined range that can be auto-aligned with the corneal apex of the eye to be examined EL (left eye). The circuit 400 controls the operation of the pulse motors 324 and 326 and the Y-direction drive device 320 so that the main optical axes OL and OR of the eye refractive power measurement units 319L and 319R are aligned through the half mirrors Hm and Hm, thereby completing the alignment. To do.
[0077]
In addition, after the measurement optical systems 330L and 330R are aligned with the corneal apexes of the eye to be examined EL (left eye) and ER (right eye), the eye to be examined EL (left eye) and ER (right eye) move somewhat. Even if the main optical axes OL and OR of the measurement optical systems 330L and 330R are shifted from the optical axes O1 and O2 of the eye to be examined EL (left eye) and ER (right eye), the control circuit shown in FIG. Since the motors 324, 326 and the Y-direction drive device 320 are driven and controlled as described above, and the left and right eyes are offset, alignment is always performed.
(7) Eye refractive power measurement by objective
In this way, the customer 407 only coarsely aligns the measurement optical systems 330L and 330R with the eye to be examined EL (left eye) and the eye to be examined ER (right eye), and the measurement optical systems 3330L and 330R are to be examined eye EL (left eye). ), It is automatically aligned with the eye to be examined ER (right eye).
[0078]
Accordingly, the eye refractive power measuring device 312 is set to the objective eye refractive power measurement mode by the optometry mode selection switch 31c for selecting the objective or subjective optometry mode, and the position of the fixation target 33 is set as described above. After setting to the far point, near point, or any position, the measurement optical system 330L, 330R is aligned as described above, and the fixation target 33 of the measurement optical system 330L is placed on the subject's eye EL, ER. By looking the fixation target 33 of the measurement optical system 330R through the half mirrors Hm and Hm, the subject's eyes EL and ER are fixed to the fixation target image, and the measurement optical systems 330L and 330R are fixed. At the time of alignment, as described above, the degree of refraction of the subject eye EL (left eye) and the subject eye EL (right eye) during distance vision or near vision is automatically measured objectively.
(8) Eye refractive power measurement by awareness
After the customer 307 sets the eye refractive power measurement device 312 to the subjective eye refractive power measurement mode by the optometry mode selection switch 31c for selecting the objective or subjective optometry mode, the distance measurement switch 315d or When the near measurement switch 315e is turned on, as described above, the measurement optical systems 3330L and 330R are automatically used for distance vision or near vision for the eye to be examined EL (left eye) and the eye to be examined ER (right eye). Make visual alignment. On the other hand, the arithmetic control circuit 315a displays the optometry chart on the liquid crystal display 341 via the arithmetic control circuit 400. The optometry chart displayed on the liquid crystal display 341 is applied to the left eye EL via the lenses 342a and 343a of the turret disks 342 and 343 or through holes (not shown), the mirror 345, the half mirror 9 and Hm. Incident.
[0079]
Therefore, in this state, the optometry chart of the liquid crystal display 341 is selected according to the optometry purpose, and the turret disk 342 is rotationally driven by the driving device 410 to sequentially insert the spherical lenses 342a having different refractive powers into the optical path. The appearance of the optometry chart of the liquid crystal display 341 is made clear. When there is astigmatism, the turret disk 343 is rotationally driven by the driving device 411 so that the cylindrical lenses 343a having different refractive powers are sequentially inserted into the optical path, and the cylindrical lens 343a is rotated around the optical axis in the optical path. By rotating by the pulse motor 343b, the cylindrical axis of the cylindrical lens 343a is rotated so that the appearance of the optometry chart of the liquid crystal display 341 becomes clear.
[0080]
The arithmetic control circuit 315a obtains the spherical refractive power and the cylindrical refractive power of the lenses 342a and 343a inserted in the optical path from the driving amounts of the driving devices 410 and 411, and the direction of the cylindrical axis of the lens 343a is determined by the cylindrical lens 343a. Is obtained from the amount of rotation around the optical axis in the optical path. This rotation amount can be obtained from the rotation drive amount of the pulse motor 343b. The series of operations can be performed by operating the joystick lever 315b, but may be performed by providing a dedicated panel.
[0081]
At this time, the eye refractive power measurement units 319R and 319L are always auto-aligned, and even if the face position of the customer (subject) is slightly shifted during the subjective eye examination, the examination can proceed without any trouble.
(9) Other
In the embodiment described above, it has been described that the optometry is performed without fixing the face of the customer 407. However, in practice, a chin rest and a forehead support for fixing and supporting the customer's face are provided on the optometry table 310, and the forehead support. Is provided with a human sensor (switch) for detecting the customer to detect whether or not the customer has started optometry. In this case, since the position of the customer's face relative to the optometry apparatus main body 314 is specified, more accurate measurement can be performed.
[0082]
Further, the chin rest and the forehead support can be mounted on the optometry table 310 so that the height can be adjusted and used for height adjustment with the optometry apparatus main body 314. Furthermore, only the chin rest can be mounted on the optometry table 310 so that the height can be adjusted, and used for height adjustment with the optometry apparatus main body 314. Further, only the forehead support can be attached to the optometry table 310 so that the height can be adjusted, and can be used for height adjustment with the optometry apparatus main body 14.
[0083]
Further, a chin rest is provided on the optometry apparatus main body 314, and a customer who places the chin on the chin rest causes both eyes to approach the optometry window 402 and look inside the optometry window 402, and optometry is performed in this state. be able to. In this case, the height from the jaw to both eyes varies depending on the customer. Therefore, a forehead is provided on the optometry apparatus main body 314, and the forehead is placed on the forehead so that the customer brings both eyes closer to the optometry window 402 and looks into the optometry window 402. In this state, the optometry is performed. Thus, the position where the forehead hits the forehead can be easily changed, and the customer can easily adjust the eye height with respect to the optometry window 402. Further, the forehead support and the chin rest may be provided in the optometry apparatus main body 314. In this way, by adjusting the height of the optometry apparatus main body 314 relative to the customer's face, the forehead rest and chin rest can be easily adjusted to the height of the customer's face by adjusting the height of the forehead rest and chin rest. Can be used smoothly.
[0084]
Furthermore, the monitor of the customer (for the subject) does not have 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.
[0085]
Further, the display device 406 (monitor) of the customer (for the subject) is also used to display the operation method before starting the optometry in conjunction with the sound. That is, in this case, when the customer enters the optometry box or when the customer is seated in a chair in the optometry box and receives this detection signal, Please adjust the height. "If the height adjustment is OK, the message" Please press the start button "is output. In this case, the same content as the ON voice message is displayed on the display device 406.
[0086]
Further, the height of the customer's face and the optometry apparatus body 314 can be adjusted based on the customer's image captured by the television camera 403. That is, the height (vertical position) of the customer's face image captured by the TV camera 403 is obtained by image processing, and the elevation control device 313 is driven and controlled by the arithmetic control circuit 315a, so that the height of the customer's eyes is increased. The optometry apparatus main body 314 can be driven up and down to a position that matches the height of the optometry window 402 of the optometry apparatus main body 314 to perform the alignment. By doing in this way, an examiner-less optometry can be performed.
[0087]
In addition, a forehead is provided on the optometry apparatus main body 314 and a side camera is provided on the side of the chair in the optometry box. When it is detected that the customer is seated on the chair in the optometry box, an image from the side camera is displayed. The height of the customer's face is obtained by image processing based on the customer, and the height of the chair is adjusted, thereby adjusting the height of the customer's face with respect to the optometry window 402 of the optometry apparatus body 31 and optometry. It is also possible to have the customer's amount applied to the amount of the device main body 314. By doing in this way, an examiner-less optometry can be performed.
[0088]
In addition, in the case of optometry as described above, if it is determined that it is difficult to handle without an examiner from the optometry data of the customer, the astigmatism axis is oblique in the case of extreme astigmatism, in the case of intense astigmatism, in the case of extreme spherical power. In the case of astigmatism, when the corrected visual acuity value is extremely low, an administrator (operator) on the optometry information center 300 side remotely operates the eye refractive power measuring device 312 from the center side.
[0089]
Furthermore, if the optometry is not smooth or there is no response from the customer, or if the red / green test is not performed well, or if there is no response for a predetermined time, the administrator (operator) on the optometry information center 300 side The eye refractive power measuring device 312 is remotely operated from the center side, or an administrator (operator) on the optometry information center 300 side uses the eye refractive power measuring device 312 to display a speaker or display device 406 (not shown) of the optometric device main body 314. Use it to inform customers.
(10) Consulting
After the above-described optometry is completed, when optometry data based on this optometry is transmitted from the arithmetic control circuit 315a to the computer 307 of the optometry information center 300 via the Internet 310, the center administrator transmits the optometry data. Consulting with the customer 407 is performed based on the optometry data.
[0090]
In this case, a prescription value or the like of glasses is created based on the optometry data, and the prescription value is used as data for selecting the spectacle lens, and the spectacle lens and the customer are selected based on this data. By the way, the spectacle lens has a lens thickness that decreases in the order of low refractive material, medium refractive material, and high refractive material, and the price (cost) increases in this order. Therefore, when the visual acuity value of the customer is relatively good, the lens edge thickness is not increased even with a low-refractive material low-cost spectacle lens. However, if the eyesight value of the customer is very low and the eyeglass lens is low, using a low-refractive material low-cost spectacle lens will make the spectacle lens edge too thick, and depending on the spectacle frame, the appearance of the spectacle will be poor. . In this case, by using a high-refractive-index spectacle lens that increases the cost but reduces the edge thickness, the edge thickness of the eyeglass can be reduced so that the appearance is not impaired. The manager on the center side consults with the customer about such a cost and the viewpoint of the lens edge thickness, etc., so that the customer can refer to the selection of the eyeglass lens.
[0091]
On the center side, while viewing the face of the customer 407 displayed on the display device 308, a large number of eyeglass frame images are transmitted to the arithmetic control circuit 315a via the Internet 310, and this eyeglass frame image is displayed on the optometry apparatus main body side. The information is displayed on the device 406, and a frame selection is consulted by voice or a character on the display device 406 via a speaker (not shown) provided in the optometry apparatus main body 14.
(11) Composition and selection of eyeglass frames
In addition, the customer's face image captured by the TV camera 403 is transmitted to the computer 307 of the optometry information processing center 300 via the Internet 310 and recorded in an information recording / reproducing apparatus (hard disk, DVD, etc.) (not shown) of the computer 307. The eyeglass frame can be selectively combined with the image of the customer's face, and this combination is simply selected by the customer with the joystick lever 315b on the optometry apparatus main body 314 side, and the combined image of the eyeglass frame and the face image is displayed on the Internet. The frame may be selected by causing the calculation control circuit 315a to return in 310 and displaying the composite image of the spectacle frame and the face image returned in k on the display device 406 of the optometry apparatus main body 314.
(Modification)
In the embodiment described above, an example has been shown in which the optometry apparatus such as the eye refractive power test apparatus 312 disposed in many places is managed on the optometry information center 300 side via the Internet 310, but is not necessarily limited thereto. Is not to be done.
[0092]
For example, as shown in FIGS. 29 and 30, the optometry boxes B1, B2, B3, etc. are arranged at the corner of the spectacle store 600, and the optometry apparatus such as the eye refractive power test apparatus 312 is installed in the optometry boxes B1, B2, B3. In addition, a management room 601 is provided in another corner of the spectacle store 600, and the optometry information processing apparatus 306 described above is disposed in the management room 601 so that the optometry of the optometry information processing apparatus 306 and the eye refractive power test apparatus 312 or the like. It is also possible to connect the apparatus via an intranet 602 and perform optometry management and consulting as in the above-described center in the management room 601.
(Other)
In the embodiment described above, an example in which the eye refractive power measurement units 319R and 319L are provided so as to be horizontally rotatable is shown, but the present invention is not necessarily limited thereto. For example, the eye refractive power measurement units 319R and 319L are provided so as to be movable and driven only to the left and right while facing each other, and the left and right half mirrors Hm and Hm can be rotationally driven and controlled by a pulse motor (not shown). You may enable it to change the direction of the optical axis of measurement unit 319R, 319L.
[0093]
In this case, when both eyes of the customer are congested, the actual X, Y, Z coordinates are calculated from the X, Y, Z coordinates of the eye refractive power measurement units 319R, 319L, taking this convergence angle into consideration. The correction value may be calculated according to the convergence angle of both eyes of the customer, and the three-dimensional drive devices 317L and 317R may be driven and controlled based on the correction value.
[0094]
If the angle of convergence is present, control is performed to measure and move a plurality of times until a predetermined position is reached, and to drive.
[0095]
In addition, the eye refractive power measurement units 319R and 319L always perform auto-tracking (auto-alignment), and wait for a response from the customer (subject). You may make it advance to.
[0096]
Further, the eye refractive power measurement units 319R and 319L that perform auto-tracking, chart presentation, and awareness are independent of the calculation control circuit 315a that receives the response of the subject, and the eye refractive power measurement unit from the calculation control circuit 315a. Communication of instructions to 319R and 319L is performed using communication.
[0097]
【The invention's effect】
As described above, the invention of claim 1 is provided with the left eye refractive power measurement unit and the right eye refractive power measurement unit that can be obtained objectively and subjectively, and each eye refractive power is provided. An eye refractive power measuring device provided such that the force measuring units can be driven at least left and right by independent driving means; horizontal rotating means for horizontally rotating each of the eye refractive power measuring units independently; The distance between the binocular refractive power measurement units and the measurement optical axis angle are obtained from the left and right driving amounts and horizontal rotation amounts of the respective eye refractive power measurement units, and the distance between the pupils of the left and right eyes of the subject is determined from the intervals. Since the calculation control circuit to be obtained is provided, it is possible to obtain the interpupillary distance when the distance is viewed and the interpupillary distance when the distance is viewed.
[0098]
In the invention of claim 2, the eye refractive power measurement unit is configured to be driven forward / backward / left / right / up / down by a three-dimensional drive mechanism, and is configured to be auto-aligned. Alignment for the refractive power and the refractive power of the eye can be easily performed.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an arrangement of an optometry box in which an optometry apparatus (eye refractive power measurement apparatus) according to the present invention is installed.
2 is an explanatory diagram of an optometry system using an optometry apparatus of an optometry box arranged as in FIG. 1. FIG.
3 is a schematic explanatory diagram of an optometry apparatus installed in the optometry box shown in FIG. 1. FIG.
4A is a schematic explanatory diagram 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. .
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.
8 is a plan view of the three-dimensional table of FIG.
9 is a front view of the optometry apparatus main body of FIG. 4. FIG.
10 is an enlarged explanatory diagram of the display device of FIG. 9;
FIG. 11 is a control circuit diagram of the optometer of FIGS. 3 to 10;
12 is an operation explanatory diagram of the display device of FIG. 9. FIG.
13 is an operation explanatory diagram of the display device of FIG. 9;
14 is an operation explanatory diagram of the display device of FIG. 9. FIG.
15 is an operation explanatory diagram of the display device of FIG. 9;
16 is an explanatory diagram showing an optical system of the optometry apparatus shown in FIGS. 3 to 10. FIG.
FIG. 17 is an explanatory diagram of a chopper of the optical system in FIG.
18 is an explanatory diagram showing a detection principle of the optical system of FIG. 16. FIG.
FIG. 19 is an explanatory diagram showing a detection principle of the optical system of 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.
22 is an explanatory diagram showing a detection principle of the optical system of FIG. 16. FIG.
23 is a front view of a reflected light blocking diaphragm of the optical system of FIG.
24 is a front view of a collimation scale of the optical system of FIG.
25 is a block diagram of a control circuit of the optical system in FIG.
26 is an explanatory diagram of an output signal of the two-dimensional light receiving element of the optical system of FIG.
27 is a waveform diagram of a control circuit of the optical system in FIG. 16. FIG.
28 is a waveform diagram of another control circuit of the optical system of FIG.
FIG. 29 is an explanatory diagram showing another example of the present invention.
30 is an explanatory diagram of the wiring of FIG. 29. FIG.
[Explanation of symbols]
315a: Arithmetic control circuit
317L, 317R ... 3D drive device (3D drive means)
318L, 318R ... Horizontal rotation device (horizontal rotation means)
319L: Left eye refractive power measurement unit
319R: Right eye refractive power measurement unit

Claims (2)

A left eye refractive power measurement unit and a right eye refractive power measurement unit that can be obtained objectively and subjectively are provided, and each eye refractive power measurement unit is at least left and right by independent driving means. An eye refractive power measurement device provided to be drivable,
Horizontal rotation means for horizontally rotating the respective eye refractive power measurement units, and the distance and measurement of the binocular refractive power measurement units from the left and right driving amounts and horizontal rotation amounts of the respective eye refractive power measurement units. An eye refractive power measuring apparatus comprising an arithmetic control circuit for obtaining an optical axis angle and obtaining a distance between pupils of left and right eyes of the subject from the interval. 2. The eye refractive power measuring apparatus according to claim 1, wherein the eye refractive power measuring unit is provided so as to be capable of being driven forward / backward, left / right, and up / down by a three-dimensional drive mechanism, and can be automatically aligned.

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