JP2006098409A - Lens meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens meter for measuring accurate refraction characteristics in eyeglass lenses. <P>SOLUTION: The lens meter comprises measurement optical systems SL, SR, having projection optical systems 47L, 47R for projecting measurement luminous flux to the lenses (eyeglass lenses LL, RL) of glasses 5 and light-receiving optical systems 48L, 48R having a light-receiving element CCD60 for receiving measurement luminous flux through the lens of the eyeglasses 5; holding members 28, 29 having a lens-receiving part (lens bearing 86) for supporting the lenses of the eyeglasses 5, arranged between the projection optical system and the light-receiving optical system and coming into contact with the eyeglasses 5 supported by the lens-receiving section from the front and the back; a lens-receiving mechanism 80 for moving the lens-receiving section between the measurement optical path of the measurement optical system and a retracted position outside the measurement optical path; and a control circuit (arithmetic control circuit 69) for controlling the lens receiving mechanism 80 for retracting the lens-receiving section at the retracted position, after the pair of eyeglasses 5 is held by the holding members from the front and back. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lens meter in which the refractive characteristics of the right and left spectacle lenses of spectacles (glasses) can be individually measured with two measuring optical systems.

  A conventional lens meter is composed of an upper storage protrusion and a lower storage protrusion that are provided at upper and lower portions of the front surface of the main body case with a vertical spacing, and a single lens provided on the upper surface of the lower storage protrusion. A lens table mounted on the main body case so as to be able to move back and forth with respect to the lens receiver, a nosepiece support member mounted on the lens table so as to move left and right and move up and down, and a lens receiver A lens having a measurement optical system for measuring the refractive characteristics of a lens placed on the lens is known. In this lens meter, the measurement optical system includes an illumination optical system provided in the main body case and the upper housing protrusion, and a light receiving optical system provided in the lower housing protrusion and the main body case.

  In this lens meter, the nosepiece support of the glasses is supported by the nosepiece support member, and the left and right lens frames of the eyeglass frame are brought into contact with the front surface of the lens table to move the nosepiece support member left and right and up and down. At the same time, the lens table is moved back and forth so that one of the left and right eyeglass lenses is brought into contact with the lens receiver, and the refractive characteristics of the one eyeglass lens are measured by the measurement optical system. When measuring the other spectacle lens, the spectacle frame is moved in the same manner as described above so that the other spectacle lens comes into contact with the lens receiver.

  However, in the conventional lens meter, when measuring the left and right spectacle lenses, it is necessary to replace the spectacle lenses with respect to one lens holder and to support them, which is troublesome.

  In order to solve this problem, it is conceivable to provide a pair of optical systems for measuring the right and left spectacle lenses of the spectacles. In this case, on the measurement optical axis of each light receiving optical system, it is necessary to make the distance between the lower surface of the spectacle lens and the light receiving means of the light receiving optical system constant in order to measure the accurate refraction characteristics of the spectacle lens.

  In view of this, the present invention makes it possible to make the distance between the lower surface of the spectacle lens and the light receiving means of the light receiving optical system constant with a simple configuration on the measurement optical axis of the optical system that measures the left and right spectacle lenses of the spectacles. It is an object of the present invention to provide a lens meter that can measure various refractive characteristics.

  In order to achieve this object, the invention according to claim 1 is a light receiving optical system provided with a projection optical system for projecting a measurement light beam onto a spectacle lens, and a light receiving element for receiving the measurement light beam that has passed through the lens of the spectacles. A measuring optical system, and a lens meter including a lens receiver that supports a lens of the glasses disposed between the projection optical system and the light receiving optical system, and each of the glasses supported by the lens receiver. A holding member that holds the glasses from the front and back by abutting from the front and rear; a lens receiving mechanism that enables the lens receiver to be movable in a measurement optical path of the measurement optical system and a retracted position outside the measurement optical path; and the glasses The lens meter has a control circuit that controls the lens receiving mechanism to retract the lens receiver to the retracted position after being held by the holding member from the front and rear. The features.

  According to a second aspect of the present invention, in the lens meter according to the first aspect, the measurement optical system is provided in a pair of left and right.

  Furthermore, the invention of claim 3 is characterized in that a nose pad support mechanism is provided which is positioned between the lens receivers when the lens receivers are respectively positioned in the measurement optical paths of the left and right measurement optical systems. .

  According to this configuration, the distance between the lower surface of the spectacle lens and the light receiving means of the light receiving optical system on the measurement optical axis of the optical system that measures the left and right spectacle lenses of the spectacles is made constant with a simple configuration, and the spectacle lens is accurate. Can be measured.

Embodiment 1 of the Invention

Embodiment 1 of the present invention will be described below with reference to the drawings.
[Constitution]
<Main unit>
FIG. 1 is an external view of a lens meter according to the present invention. In FIG. 1, reference numeral 1 denotes an apparatus main body (main body case). The apparatus main body 1 has a substantially U-shaped side surface from an upper housing portion 2, a lower housing portion 3, and a continuous housing portion 4 that connects them. A space 6 between the upper housing 2 and the lower housing 3 is a set space 6 for glasses 5.
<Glasses>
In the present embodiment, the eyeglasses 5 include eyeglass lenses LL and RL framed in the eyeglass frame MF, the left and right lens frames LF and RF of the eyeglass frame MF, and the left and right lens frames LF and RF. It has a bridge B, nose pads (not shown) provided on the left and right lens frames LF, RF, and temples LT, RT provided on the left and right lens frames LF, RF.

Moreover, the opening 8 extended to both right-and-left both ends is formed in the upper wall 7 of the lower housing | casing part 3 as shown in FIG. 1, FIG. The upper wall 7 is divided into a front upper wall portion 7 a and a rear upper wall 7 b by an opening 8. A lens receiving mechanism 80 shown in FIG. 3 is disposed below the left and right sides of the opening 8.
<Lens receiving mechanism 80>
The lens receiving mechanism 80 includes a left lens receiving mechanism 80L and a right lens receiving mechanism 80R. The lens receiving mechanism 80 is accommodated in the lower casing 3 described above. Since the left lens receiving mechanism 80L and the right lens receiving mechanism 80R have the same configuration, the same reference numerals are given and only one configuration will be described.

  The left lens receiving mechanism 80L includes a driving device (driving means) 81 such as a driving motor or a rotary solenoid in which the rotation output shaft 81a is directed vertically (up and down), and a turntable 82 provided at the upper end portion of the output shaft 81a. The lifting / lowering means 83 mounted on the turntable 82 in the vertical direction (vertical direction), the support shaft 84 driven up and down by the lifting / lowering means 83, and the upper end of the support shaft 84 mounted in the horizontal direction. And a rod-shaped lens receiving shaft (lens receiver) 86 that is vertically attached to the tip of the arm 85 in the upward direction. A hemispherical lens receiving portion 86 a is formed at the upper end portion of the lens receiving shaft 86.

  The heights of the upper ends of the lens receiving shafts 86 and 86 of the lens receiving mechanisms 80L and 80R are set to be the same. That is, the heights of the upper ends of the hemispherical lens receiving portions 86a and 86a of the lens receiving mechanisms 80L and 80R are set to be the same.

In addition, as the raising / lowering means 83, a hydraulic cylinder, a solenoid, or a feed mechanism using a drive motor and a screw can be used.
<Lens holding mechanism>
The eyeglass lenses LL and RL supported on the lens receiving shafts 86 and 86 are pressed by the lens pressing mechanism 13 shown in FIGS.

  As shown in FIG. 2, the lens pressing mechanism 13 includes guide rails 14, 14 that are horizontally fixed to the inner wall surfaces of the side walls 3 a, 3 a of the lower housing portion 3 in the front-rear direction, and the upper guide rails 14, 14. The cam member 15 is held at both ends so as to be movable back and forth. Further, as shown in FIG. 5, the lens pressing mechanism (lens holding means) 13 includes a rack 16 integrally provided at the rear portion of one cam member 14, a gear 17 meshed with the rack 16, and a gear. 17 and a support shaft 18 rotatably held on the side wall 3a and an operation lever 19 attached to the support shaft 18 as shown in FIG.

  Further, as shown in FIG. 5, the lens pressing mechanism 13 moves up and down on the bracket 20 attached to the rear upper wall 7 b, the shaft holding member 21 held on the lower end of the bracket 20, and the shaft holding member 21. A support shaft 22 that is freely held and penetrates the rear upper wall 7b up and down, a flange 22a that is positioned between the shaft holding member 21 and the rear upper wall 7b, and is formed integrally with the support shaft 22, and a flange 22a; A coil spring (biasing means) 23 is provided between the rear upper wall 7b and biases the support shaft 22 downward. The lens pressing mechanism 13 is integrally provided at the upper end portion of the support shaft 13 so as to be rotatable around a horizontal axis extending in the front-rear direction and the front end portion of the rotation support shaft 24. A U-shaped support member 25 and lens pressing shafts (lens pressing members) 26 and 26 held downward on the support shaft portions 25a and 25a on both sides of the support member 25 are provided. The lens holding shafts 26 and 26 are made of a material that does not damage the spectacle lens such as rubber or synthetic resin.

In the state where the operation lever 19 is erected as shown in FIG. 1, the cam member 15 is at the position shown in FIG. 5, and the lens pressing shafts 26 are largely separated upward as shown in FIG. Then, when the operating lever 9 is tilted forward as indicated by an arrow 27 in FIG. 1, the gear 17 moves and displaces the rack 16 to the right in FIG. 5, and the cam member 15 is displaced to the right integrally with the rack 16. Thus, the support shaft 22, the support member 25, and the lens pressing shafts 26 and 26 are displaced downward by the spring force of the coil spring 23.
<Glasses frame holding mechanism>
Further, the apparatus main body 1 is provided with a frame holding mechanism for holding the spectacle frame MF of the spectacles 5 in which the spectacle lenses LL and RL are supported by the lens receivers 9L and 9R, respectively.

This frame holding mechanism includes a frame front-rear direction positioning mechanism (lens frame front-rear direction positioning mechanism) and a nose support mechanism 30 (see FIG. 8) attached to the middle portion of the frame holding members 28 and 29 in the left-right direction. .
(Frame longitudinal positioning mechanism)
This lens frame positioning mechanism has a pair of frame holding members (lens holding members, lens frame holding members) 28 and 29 extending left and right and disposed on the front upper wall 7a and the rear upper wall 7b.

  Further, slits 31, 31 extending in the front-rear direction are formed in the left and right portions of the front upper wall portion 7 a as shown in FIG. 1. As shown in FIGS. 6 and 7, a movable member 32 integral with the frame holding member 28 is inserted into the slit 31. Similarly, a slit 33 is formed in the rear upper wall 7b as shown in FIGS. 6 and 7, and a movable member 34 integral with the frame holding member 29 is formed in the slit 33 as shown in FIGS. It is inserted.

  Further, guide shafts 35, 35 extending in the front-rear direction and penetrating the movable members 32, 34 are disposed on both sides in the lower housing part 3. The guide shafts 35 and 35 are fixed to the lower housing part 3 at positions not shown. In addition, the movable members 32 and 33 are spring-biased in a direction approaching each other by a tension coil spring 36 interposed therebetween. A pair of slide members 37 and 38 are held on the one guide shaft 35 so as to be movable between the movable members 32 and 33 so as to be movable back and forth in the axial direction.

  Further, a drive motor (drive means) 39 is fixed to the side wall 3a, and a left screw portion 40a and a right screw portion 40b are formed on the drive shaft 40 that is rotationally driven by the drive motor 39 at intervals in the axial direction. The left screw portion 40a is screwed in a state of penetrating the slide member 37, and the right screw portion 40b is screwed in a state of penetrating the slide member 38.

Due to the action of the left screw portion 40a and the right screw portion 40b, the slide members 37 and 38 approach each other by the same amount when the drive shaft 40 rotates forward, and the slide members 37 and 38 move away from each other by the same amount when the drive shaft 40 rotates reversely. It is supposed to be. It is preferable to provide a film or layer of a material having an anti-slip function such as rubber on the holding surfaces of the slide members 37 and 38.
(Nose contact support mechanism 30)
As shown in FIG. 9, the nosepiece support mechanism 30 includes a support shaft 41 attached to the center in the left-right direction of the frame holding member 29, a rotating plate 42 that is rotatably supported by the support shaft 41, and FIGS. A torsion coil spring 43 wound around the support shaft 41 as shown in FIG. 10 and biasing the rotation plate 42 upward, and a support shaft 44 held at the tip of the rotation plate 42 as shown in FIG. 11 and 12, a nosepiece support member 45 rotatably held on the support shaft 44, and a torsion coil spring wound around the support shaft 44 and biasing the nosepiece support member 45 upward. 46.

The nose support member 45 has a tapered shape such that the left and right side surfaces 45a and 45a expand as shown in FIG. 12 (b), or a ridge as shown in FIG. 12 (c). Can be used. The nose pads NP and NP of the left and right lens frames LF and RF of the glasses 5 are in contact with and supported by the nose contact member 45. The nosepiece support member 45 supports the nosepieces NP and NP of the glasses 5 so that the bridge B of the glasses 5 is positioned in the center of the apparatus body 1 in the left-right direction, and the spectacle lenses LL, The LR can be made to accurately face the optical path of the right pair of measurement optical systems SL and SR (see FIG. 13) located on the left and right of the apparatus main body 1.
<Measurement optical system>
(Left measuring optical system SL)
The measurement optical system SL has a light projecting optical system (illumination optical system) 47L built in the upper housing 2 and a light receiving optical system 48L built in the lower housing 3.

  The light projecting optical system 47L includes LEDs 49 and 50, collimating lenses 51 and 52, and a dichroic mirror 53. The LED 49 emits infrared light, and the LED 50 emits red light (wavelength 630 nm). The dichroic mirror 53 reflects infrared light and transmits red light. The collimating lenses 51 and 52 serve to convert divergent light beams generated from the LEDs 49 and 50 into parallel light beams as measurement light beams.

  The light receiving optical system 48L includes a Hartmann pattern plate 54, a field lens 55, reflection mirrors 56 and 57, an optical path combining prism 58, an imaging lens 59, and a CCD (light receiving element, light receiving means) 60. The pattern plate 54 is provided with a large number of light transmission portions (not shown) in a matrix.

The axis of the lens receiving shaft 86 of the lens receiving mechanism 80L described above is provided in parallel with the measurement optical axis of the measurement optical system SL.
(Right measurement optical system SR)
The measurement optical system SR has a light projecting optical system (illumination optical system) 47R built in the upper housing 2 and a light receiving optical system 48R built in the lower housing 3.

  The light projecting optical system 47R includes LEDs 61 and 62, collimating lenses 63 and 64, and a dichroic mirror 65. The LED 61 emits infrared light, and the LED 62 emits red light (wavelength 630 nm). The dichroic mirror 65 reflects infrared light and transmits red light. The collimating lenses 63 and 64 serve to convert divergent light beams generated from the LEDs 61 and 62 into parallel light beams as measurement light beams.

  The light receiving optical system 48R includes a Hartmann pattern plate 66, a field lens 67, a reflecting mirror 68, an optical path combining prism 58, an imaging lens 59, and a CCD (common to the left measuring optical system SL) 60. The pattern plate 66 is provided with a number of light transmission parts (not shown) in a matrix.

The axis of the lens receiving shaft 86 of the lens receiving mechanism 80R described above is provided in parallel with the measurement optical axis of the measurement optical system SL. In addition, by using the light receiving elements of the left measurement optical system SL and the right measurement optical system SR as a common CCD 60, the refractive characteristics of the left and right eyeglass lenses LL and LR can be measured substantially simultaneously with fewer optical components. Further, in this embodiment, the light receiving elements of the left measurement optical system SL and the right measurement optical system SR are the common CCD 60, but this CCD 60 is provided for each of the left measurement optical system SL and the right measurement optical system SR. It may be provided individually. In this case, the refractive characteristics of the left and right eyeglass lenses LL and LR can be measured completely simultaneously.
<Control circuit>
The output from the CCD 60 is input to the arithmetic control circuit 69. The output from the arithmetic control circuit 69 is input to the personal computer PC. The side wall 3 a is provided with a sensor 70 that detects that the operating lever 19 is tilted horizontally, and an output from the sensor 70 is input to the arithmetic control circuit 69. Then, when there is no detection signal from the sensor 70, the arithmetic control circuit 69 rotates the drive motor 39 normally for a predetermined time to rotate the drive shaft 40 normally. In addition, when the detection signal from the sensor 70 is detected, the arithmetic control circuit 69 reverses the drive motor 39 for a predetermined time and reverses the drive shaft 40.
[Action]
Next, the operation of the lens meter having such a configuration will be described.

  In such a configuration, before the spectacle lenses LL and LR are arranged in the space 6 shown in FIG. 1, the ends of the arms 85 and 85 of the lens receiving mechanisms 80L and 80R are connected to each other as shown by solid lines in FIGS. While facing each other, the lens receiving shafts 86 and 86 of the lens receiving mechanisms 80L and 80R are raised to the position indicated by the solid line, and the upper ends of the lens receiving shafts 86 and 86 are moved as shown by the solid line in FIG. It protrudes upward from the opening 8. Further, the heights of the upper ends of the hemispherical lens receiving portions 86a and 86a of the lens receiving shafts 86 and 86 are set to be the same. At this position, the axis lines of the lens receiving shafts 86 and 86 are made to coincide with the optical axes OL and OR of the left and right measuring optical systems. In FIG. 3, the lens pressing rods 26 and 26 are spaced above the lens receiving shaft 86 as indicated by broken lines. In effect, a set space 6 is formed between the lens pressing rods 26 and 26 and the lens receiving shaft 86.

  From this state, the spectacles 5 are put into the set space 6, the left spectacle lens LL of the spectacles 5 is disposed between the left lens receiving shaft 86 and the lens pressing rods 26, 26, and the right spectacle lens of the spectacles 5 The LR is disposed between the right lens receiving shaft 86 and the lens pressing rods 26 and 26. At this time, the temples LT and RT are disposed on the left and right sides of the lower casing 3.

  Then, the nose pads NP and NP of the left and right lens frames LF and RF of the glasses 5 are abutted and supported by the nose contact member 45. Thereby, the left and right eyeglass lenses LL and LR of the eyeglass 5 can be accurately distributed to the left and right with respect to the left and right measuring optical systems SL and SR. In this state, by moving downward against the spring force of the nose contact member 45 torsion coil springs 43 and 46, the lower surfaces (rear side refracting surfaces) of the spectacle lenses LL and LR of the spectacles 5 as shown in FIG. The lens bearing shafts 86 and 86 are abutted and supported at points on the hemispherical lens receiving portions 86a and 86a.

  When the operation lever 9 is tilted forward from this state, the lever detection signal from the sensor 70 input to the arithmetic control circuit 69 at the beginning of the tilting operation disappears, and the arithmetic control circuit 69 causes the drive motor 39 to rotate forward for a predetermined time. Let As a result, the drive shaft 40 is rotated in the forward direction, and the slide members 37 and 38 are moved toward each other by the action of the left screw portion 40a and the right screw portion 40b of the drive shaft 40.

  At this time, the movable frames 32, 34 follow the slide members 37, 38 by the spring force of the coil spring 36, respectively, and the frame holding members 28, 29 are moved toward each other. The frame holding members 28 and 29 are moved by the same amount with respect to the optical axes OL and OR of the left and right measuring optical systems SL and SR so that the distances to the optical axes OL and OR are equal. Further, along with this movement, the frame holding members 28 and 29 are brought into contact with the eyeglass frame MF (lens frames LF and RF) of the eyeglasses 5 by the spring force of the coil spring 36 to hold the eyeglass frame MF of the eyeglasses 5 from the front and rear. (Hold).

  In addition, the slide members 37 and 38 have the left screw portion 40a of the drive shaft 40 even after the frame holding members 28 and 29 abut the eyeglass frame MF (lens frames LF and RF) of the glasses 5. And it is moved to the position of FIG. 7 by the action of the right screw portion 40b.

  The movement to this position can be obtained by setting the forward rotation time of the drive motor 39. Note that this position may be detected by detection means such as a switch or a sensor, and the drive motor 39 may be stopped.

  On the other hand, when the operation lever 9 is tilted forward, the rotation of the operation lever 9 is transmitted to the gear 17, the rack 16 is moved to the right in FIG. 5, and the cam member 15 is integrated with the rack 16 to the right. Moved. As a result, the support shaft 22 is lowered along the inclined surface 15 a of the cam member 15 by the spring force of the coil spring 23, and the support shaft 22, the support member 25, and the lens pressing shafts 26, 26 are lowered by the spring force of the coil spring 23. To be displaced. At this time, until the frame holding members 28 and 29 are in contact with and held by the eyeglass frame MF (lens frames LF and RF) of the glasses 5, the left and right lens pressing rods 26 and 26 and 26 and 26 are the eyeglass lenses LL and LR. The operation lever 19 is held so as not to come into contact with.

  Then, after the frame holding members 28 and 29 are brought into contact with the eyeglass frame MF (lens frames LF and RF) of the glasses 5, the operation lever 19 is tilted to the front side to the horizontal position, and the left and right lens pressing rods 26 and 26 and 26 and 26 are held in contact with the eyeglass lenses LL and LR from above.

  In this way, when the operating lever 9 is tilted horizontally toward the front as shown by the arrow 27 in FIG. 1, the gear 17 moves and displaces the rack 16 to the right in FIG. 5R> 5, and the cam member 15 is integrated with the rack 16 to the right. The support shaft 22, the support member 25, and the lens pressing shafts 26 and 26 are displaced downward along the cam surface on the upper surface of the cam member 15 by the spring force of the coil spring 23. Along with this displacement, one of the lens pressing rods 26, 26 contacts the spectacle lens LL (LR) first in the lens pressing mechanisms 13, 13 provided on the left and right support members 25.

  However, the rotation support shaft 24, the support member 25, and the support shaft 22 are spring-biased downward by the coil spring 23, and the support member 25 can be rotated around the rotation support shaft 24 that is horizontal in the front-rear direction. Therefore, the left and right portions of the support member 25 rotate up and down around the rotation support shaft 24 by the spring biasing force of the coil spring 23 downward, and the lens of the support member 25 The other of the pressing shafts 26 and 26 is also in contact with the spectacle lens LL (LR), and the pair of lens pressing shafts 26 and 26 press the left and right portions of the spectacle lens LL (LR) from above.

  Next, the elevating means 83 and 83 of the lens receiving mechanisms 80L and 80R are operated to lower the support shafts 84 and 84, the arms 85 and 85, and the lens receiving shafts 86 and 86 to the positions indicated by the broken lines in FIG.

  In this state, the bridge B of the eyeglass frame MF of the glasses 5 is supported from below by the nosepiece support member 25, and the eyeglass lenses LL and LR are pressed from above by the lens pressing rods 26, 26 and 26, 26. Since the eyeglass frame MF is held (clamped) from the front and back by the frame holding members 28 and 29, the position of the eyeglass frame MF in the front-rear direction and the upper and lower sides of the eyeglass lenses LL and LR even when the lens receiving shafts 86 and 86 are lowered. The height (position) of the direction does not shift.

  Then, the driving devices 81 and 81 of the lens receiving mechanisms 80L and 80R are driven to rotationally drive the rotary table 82, and the support shafts 84 and 84, the arms 85 and 85, and the lens receiving shafts 86 and 86 are moved to the arrows 87 and 86 in FIG. As indicated by reference numeral 87, the arm 85, 85 and the lens receiving shaft 86, 86 are retracted from the optical path of the measurement optical system by rotating to the position indicated by the broken line.

  Thereafter, the arithmetic control circuit 69 turns on the LEDs 49 and 50 of the measurement optical system SL in order to measure the spectacle lens LL. At this time, the measurement light beam from the LED 49 is converted into a parallel light beam by the collimator lens 51, reflected by the dichroic mirror 53, and projected onto the spectacle lens LL.

  Accordingly, the measurement light beam that has passed through the spectacle lens LL passes through the pattern plate 54 and is guided to the CCD 60 via the field lens 55, the reflection mirrors 56 and 57, the optical path combining prism 58, and the imaging lens 59. A pattern image of the putter plate 54 is formed on the top. The measurement light beam from the LED 50 is converted into a parallel light beam by the collimator lens 51, passes through the dichroic mirror 53, and is projected onto the spectacle lens LL. Accordingly, the measurement light beam that has passed through the spectacle lens LL passes through the pattern plate 54 and is guided to the CCD 60 via the field lens 55, the reflection mirrors 56 and 57, the optical path combining prism 58, and the imaging lens 59. A pattern image of the putter plate 54 is formed on the top. Then, the arithmetic control circuit 69 measures the refraction characteristics of each part of the spectacle lens LL from the state of the pattern image formed on the CCD 60, and obtains refraction characteristic mapping data.

  Thereafter, the arithmetic control circuit 69 turns on the LEDs 61 and 62 of the measurement optical system SR in order to measure the spectacle lens LR. At this time, the measurement light beam from the LED 61 is converted into a parallel light beam by the collimator lens 63, reflected by the dichroic mirror 65, and projected onto the spectacle lens LR.

  Accordingly, the measurement light beam that has passed through the spectacle lens LR passes through the pattern plate 66 and is guided to the CCD 60 via the field lens 67, the reflection mirror 68, the optical path synthesis prism 58, and the imaging lens 59. A pattern image of the putter plate 66 is formed. The measurement light beam from the LED 62 is converted into a parallel light beam by the collimator lens 64, passes through the dichroic mirror 65, and is projected onto the spectacle lens LR. Accordingly, the measurement light beam that has passed through the spectacle lens LR passes through the pattern plate 66 and is guided to the CCD 60 via the field lens 67, the reflection mirror 68, the optical path synthesis prism 58, and the imaging lens 59. A pattern image of the putter plate 54 is formed. Then, the arithmetic control circuit 69 measures the refraction characteristics of each part of the spectacle lens LR from the state of the putter image formed on the CCD 60, and obtains refraction characteristic mapping data.

  The mapping data of the refraction characteristics of the spectacle lenses LL and LR obtained in this way is sent to the personal computer PC and displayed on a monitor (not shown) of the personal computer PC.

  In this way, the refractive characteristics (optical characteristics) of the spectacle lenses LL and LR are measured. The operation control of the driving device 81 and the lifting / lowering means 83 as described above is performed by the arithmetic control circuit 69. Further, the rotational position and the lift position of the arm 85 may be detected and determined by a sensor.

  In this way, the heights of the lower surfaces of the spectacle lenses LL and LR are more accurately specified, and the lower surfaces of the spectacle lenses LL and LR and the light receiving optical system receive light on the measurement optical axes of the left and right light receiving optical systems. The accurate refraction characteristics of the spectacle lens can be measured by making the distance to the means more accurate and constant. That is, according to the configuration of this embodiment, the lower surface of the spectacle lenses LL and LR on the measurement optical axis depends on the thickness of the spectacle lenses LL and LR, the curve of the lens back surface (lower surface), the curved shape of the frame, and the like. The distance between the lower surface of the spectacle lenses LL and LR and the light receiving means of the light receiving optical system on the measurement optical axis of each of the left and right light receiving optical systems can be made more accurate and constant. Accurate refractive characteristics of the spectacle lens can be measured.

  In addition, when measuring the refraction characteristics (optical characteristics) of the spectacle lens LL (LR), there is no member blocking the measurement light beam in the optical path of the measurement optical system, and accurate measurement can be performed. Further, the configuration is simple.

  In the above-described example, the lifting / lowering means 83 of the lens receiving shaft 86 is rotated by the driving device 81 and the arm 84 is horizontally rotated, so that the arm supporting the lens receiving shaft 86 is rotated and the lens support position and the retreat position are set. However, the present invention is not necessarily limited to this. For example, the elevating means 83 of the lens receiving shaft 86 is linearly moved forward / backward so that the lens receiving shaft 86 can be moved forward / backward linearly at two positions of the lens support position and the retracted position.

Embodiment 2 of the Invention

[Constitution]
14 to 29 show a second embodiment of the present invention. In the second embodiment of the present invention, the same or similar parts as those of the first embodiment of the invention will be described with the same reference numerals used in the first embodiment of the invention.

In FIG. 14, the apparatus main body 1 has a continuous casing section 4 in which an upper casing section 2, a lower casing section 3, and casing sections 2 and 3 are connected. The continuous housing portion 4 is formed wider than the lower housing portion 3 and is provided so as to protrude from the front wall 4a of the continuous housing portion 4 to the front side. In the left and right portions of the front wall 4a, slits 4S and 4S extending vertically are formed. Moreover, the continuous housing | casing part 4 has the cover plates 4c and 4c which cover the side walls 4b and 4b and the side walls 4b and 4b, as shown in FIG. 19, FIG. 27R> 7.
<Lens receiving structure>
As shown in FIGS. 16 and 19, openings 8 extending left and right are formed in the left and right portions of the upper wall 7 of the lower housing 3. Hartmann pattern plates 54 and 66 extending in the front-rear direction and formed in the same manner as the pattern plate 54 are attached to the left and right portions of the opening 8.

  Rod-shaped lens receiving shafts 100L and 100R serving as lens receiving structures project upward from substantially the center of the upper surfaces of the pattern plates 54 and 66, respectively. The lens receiving shafts 100L and 100R are provided with their positions slightly shifted to the left and right with respect to the centers (measurement optical axes OL and OR) of the pattern plates 54 and 66. The upper wall 7 is divided into a front upper wall portion 7 a and a rear upper wall 7 b by an opening 8.

  Further, the upper ends of the lens receiving shafts 100L and 100R are formed in a hemispherical shape to form lens receiving portions 100La and 100Ra. As a result, when the spectacle lenses LL and LR of the spectacles 5 are supported on the lens receiving shafts 100L and 100R from above as shown in FIG. 30R> 0, the dot is placed at any position on the rear refractive surface of the spectacle lenses LL and LR. Can be supported (point contact). Moreover, the heights of the upper ends of the lens receiving portions 100La and 100Ra are set to be the same.

The spectacle lenses LL and LR supported by the lens receiving shafts 100L and 100R are pressed from above by the following lens pressing mechanism.
<Lens holding mechanism>
In this lens pressing mechanism, guide rods (guide members) 101 and 102 disposed vertically on both left and right sides in the continuous housing portion 4 and upper and lower ends of the guide rod 101 are provided on the side walls 4b and 4b. Brackets 103 and 103 attached to one side, and brackets 104 and 104 having upper and lower ends of the guide rod 102 attached to the other side wall 4b and 4b are provided. The brackets 103 and 104 are detachably attached to the side walls 4b and 4b with screws (not shown).

  The lens pressing mechanism includes a slide plate (elevating member) 105 disposed between the guide rods 101 and 102, and a bearing 106 that supports one side portion of the slide plate 105 on the guide rod 101 so as to be movable up and down. 106. A U-shaped guide portion (engagement portion) 107 that engages with the guide rod 102 is formed on the other side portion of the slide plate 105.

  Further, the lens pressing mechanism is interposed between the spring plate 108 that protrudes from the lower portion of the front wall 4 a and is positioned below the slide plate 105, and is disposed between the slide plate 105 and the spring plate 108. And a pair of arms 110 and 110 each having one end portion (rear end portion) fixed to each side portion of the slide plate 105. The pair of arms 110, 110 extends to the front side, and the other end (front end) is protruded from the slits 4S, 4S. Further, as shown in FIGS. 14, 16 and 19R> 9, shaft attachment plate portions 110a and 110a projecting in directions approaching each other are integrally formed on the lower edges of the front end portions of the pair of arm portions 110 and 110, respectively. In addition, operation portions (operation knobs) 110b and 110b projecting in directions away from each other are integrally formed on the upper edges of the front end portions of the pair of arm portions 110 and 110, respectively.

  Further, the lens pressing mechanism includes support members 111 and 111 that are detachably mounted on the shaft mounting plate portions 110a and 110a, respectively, and a shaft mounting that is detachably interposed between the support members 111 and 111. The member 112, the lens pressing shafts (lens pressing members) 113L and 113R attached downward to the lower surfaces of the shaft mounting plate portions 110a and 110a, and the left and right side portions of the lower surface of the shaft mounting member 112, respectively. Lens pressing shafts (lens pressing members) 114L and 114R attached thereto. The lower ends of the lens pressing shafts 113L, 113R, 114L, and 114R are formed in a hemispherical shape. The plane Sc including the center lines of the lens holding shafts 113L and 113R includes the center lines of the lens receiving shafts 100L and 100R. Further, a pair of lens pressing shafts 114L and 114R are provided at intervals in the front-rear direction. In addition, the lens holding shafts 114L and 114L are arranged symmetrically about the plane Sc, and the lens holding shafts 114R and 114R are arranged symmetrically about the plane Sc. Accordingly, as shown in FIG. 19, the lens receiving shaft 100L enters the triangle formed by the three points of the lens pressing shafts 113L, 114L, and 114L, and the lens receiving shaft 100R is the three points of the lens pressing shafts 113R, 114R, and 114R. Therefore, the spectacle lenses LL and LR can be supported by three points from above and can be stabilized.

Although illustration is omitted, when the operation units (operation knobs) 110b and 110b are grasped and the arms 110 and 110 are moved to the vicinity of the upper housing unit 2, the arm units 110 and 110 are moved to the upper housing unit 2. Alternatively, the continuous housing portion 4 is locked by a locking means (not shown) such as a locking claw. As this locking means, since a well-known thing can be employ | adopted, the illustration and detailed description are abbreviate | omitted.
<Glasses frame holding mechanism>
In addition, a partition wall 115 disposed in the lower housing part 3 is attached in the lower housing part 3 so as to be positioned at the center in the left-right direction. The lower housing part 3 is provided with a glasses frame holding mechanism. The eyeglass frame holding mechanism includes a frame front-rear direction positioning mechanism and a nosepiece support mechanism provided in the lower housing 3. Note that slits 116 and 117 extending in the front-rear direction are formed in the center portions in the left-right direction of the upper wall portions 7a and 7b as shown in FIG. 1919.
<Frame longitudinal positioning mechanism>
This lens frame positioning mechanism has a pair of frame holding members (lens holding member, lens frame holding member) that extend to the left and right as shown in FIG. 19 and are disposed on the front upper wall 7a and the rear upper wall 7b. ) 28, 29 (see FIGS. 14 to 16) and a pair of link plates (moving members) 118, 119 (FIGS. 21 to 21) disposed in the lower housing 3 as shown in FIGS. 24). The link plates 118 and 119 are arranged along the upper part of one side surface 115a of the partition wall 115 toward the front and rear.

  As shown in FIGS. 20 and 24, the link plate 118 has an attachment piece 118a that protrudes upward at one end portion, and is spaced left and right as shown in FIGS. The slits 118b and 118c are formed, an engagement piece 118d projecting downward at the other end, and an engagement notch 118e formed downward on the engagement piece 118d. The attachment piece 118 a protrudes above the upper wall portion 7 a through the slit 116 and is attached to the frame holding member 28.

  The link plate 119 includes an attachment piece 119a projecting upward at an intermediate portion in the longitudinal direction, screw holes 119b and 119c formed at one end portion and the intermediate portion, and upward toward the other end portion. A protruding engagement piece 119d and an engagement notch 119e formed upward on the engagement piece 119d are provided. The attachment piece 119 a protrudes above the upper wall portion 7 b through the slit 117 and is attached to the frame holding member 29.

  In addition, the guide screws 120 and 121 are inserted into the slits 118b and 118c of the link plate 118, respectively, and then the tip ends are screwed into the screw holes 119b and 119c of the link plate 119, respectively. They are coupled (engaged) so as to be relatively slidable in the longitudinal direction.

Furthermore, the lens frame positioning mechanism is formed on the front wall 4a of the continuous housing portion 4 corresponding to the upper portion of the lower housing portion 3 and the partition wall 115 as shown in FIGS. Through the opening 122, a support piece 123 protruding from the side edge of the opening 122 toward the rear (in the lower housing 3), a support screw 124 attached to the support piece 123, and a support screw 124. A rotating plate (connecting member) 125 attached to the support piece 123 is provided. Engagement pins 126 and 127 are attached to the rotating plate 125 at intervals of 180 °, and engagement notches 118e and 119e of the link plates 118 and 119 are engaged with the engagement pins 126 and 127, respectively. In addition, a coil spring 128 (see FIG. 20) is interposed between the bases of the mounting pieces 118a and 119a of the link plates 118 and 119, and the coil spring 128 links in a direction in which the frame holding members 28 and 29 approach each other. The plates 118 and 119 are spring-biased.
<Nose support mechanism>
Further, as shown in FIGS. 25 and 26R> 6, the nosepiece support mechanism includes a slide plate (nosepiece support piece) 129 disposed vertically along the other side surface 115b of the partition wall 115, and The slide plate 129 has a pair of guide slits 130 and 131 formed vertically, and guide screws 132 and 133 inserted through the guide slits 130 and 131 and screwed to the partition wall 115. The guide screws 132 and 133 guide the slide plate 129 up and down.

  Furthermore, the nosepiece support mechanism is located below the guide screw 133 and protrudes from the slide plate 129. The nose support mechanism is interposed between the guide screw 133 and the spring receiver 129a so that the slide plate 129 springs downward. A biasing coil spring (biasing means) 134 and a guide plate portion 129b which is provided integrally with the lower portion of the slide plate 129 and slides up and down along the inner surface of the front wall 3b of the lower housing portion 3. And a nose pad support member 135 attached to the upper end of the slide plate 129. As shown in FIG. 25, the nosepiece support member 135 includes a core member 135a fixed to the upper end portion of the slide plate 129, and a nose made of rubber, synthetic resin or the like covering the upper surface and side surfaces of the core member 135a. The support portion 135b is provided.

  Moreover, the nosepiece support member 135 extends in the front-rear direction as shown in FIGS. 19 and 26, and has a tapered shape such that the left and right side surfaces 135c and 135d expand toward the lower side, or A bowl-shaped one can be used.

The nose pads NP and NP of the left and right lens frames LF and RF of the glasses 5 are abutted and supported by the nose pad support member 135. Then, by supporting the nosepiece NP, NP of the glasses 5 on the nosepiece support member 135, the bridge B of the glasses 5 is positioned at the center in the left-right direction of the apparatus body 1, and the eyeglass lenses LL, The LR can be made to accurately face the optical path of the right pair of measurement optical systems SL and SR (see FIG. 28) located on the left and right of the apparatus main body 1.
<Measurement optical system>
(Left measuring optical system SL)
The measurement optical system SL has a light projecting optical system (illumination optical system) 47L built in the upper housing 2 and a light receiving optical system 48L built in the lower housing 3.

  The light projecting optical system 47L includes LEDs 49 and 50 (see FIGS. 15 and 17), a collimating lens 52, a dichroic mirror 53, and a total reflection mirror M. The LED 49 emits infrared light, and the LED 50 emits red light (wavelength 630 nm). The dichroic mirror 53 reflects infrared light and transmits red light. The collimating lens 52 plays a role of converting divergent light beams generated from the LEDs 49 and 50 into parallel light beams as measurement light beams.

  The light receiving optical system 48L includes a Hartmann pattern plate 54, a field lens 55, reflection mirrors 56, 57, and 57a, an optical path combining prism 58, an imaging lens 59, and a CCD 60 (see FIGS. 15 and 18). The pattern plate 54 is provided with a large number of light transmission portions (not shown) in a matrix.

The axis (center line) of the lens receiving shaft 100L is provided in parallel with the measurement optical axis of the measurement optical system SL.
(Right measuring optical system SR) The measuring optical system SR includes a light projecting optical system (illumination optical system) 47R built in the upper casing 2 and a light receiving optical system 48R built in the lower casing 3. Have.

  The light projecting optical system 47R includes LEDs 61 and 62 (see FIGS. 15 and 17), a collimating lens 64, a dichroic mirror 65, and a total reflection mirror M. The LED 61 emits infrared light, and the LED 62 emits red light (wavelength 630 nm). The dichroic mirror 65 reflects infrared light and transmits red light. The collimating lens 64 serves to convert the divergent light beam generated from the LEDs 61 and 62 into a parallel light beam as a measurement light beam.

  The light receiving optical system 48R includes a Hartmann pattern plate 66, a field lens 67, reflection mirrors 68 and 68a, an optical path combining prism 58, an imaging lens 59, and a CCD 60 (see FIGS. 15 and 18). The pattern plate 66 is provided with a number of light transmission parts (not shown) in a matrix.

The axis (center line) of the lens receiving shaft 100R is provided in parallel with the measurement optical axis of the measurement optical system SL. Also in this embodiment, the light receiving elements of the left measurement optical system SL and the right measurement optical system SR are the common CCD 60. However, the CCD 60 is separately provided for each of the left measurement optical system SL and the right measurement optical system SR. It may be provided. In this case, the refractive characteristics of the left and right eyeglass lenses LL and LR can be measured completely simultaneously.
<Control circuit>
The output from the CCD 60 is input to the arithmetic control circuit 69. The arithmetic control circuit 69 obtains the refraction characteristic mapping data by obtaining the refraction characteristics of many points of the left and right spectacle lenses LL and LR of the spectacles 5 based on the detection signal from the CCD 60. In addition, the arithmetic control circuit 69 calculates the refractive characteristics such as the distance between the optical axes of the spectacle lenses LL and LR, the spherical power S, the cylindrical power C, and the cylindrical shaft angle A from the obtained mapping data of the refractive characteristics, the distance portion and the near portion. Refractive characteristics such as the refractive power of the use part or the addition power of the progressive lens can be obtained. Further, the arithmetic control circuit 69 can transmit the distance between the optical axes and the refraction characteristics thus obtained to other ophthalmic apparatuses (not shown) via transmission means (network, cable, wireless).
[Action]
Next, the operation of the lens meter having such a configuration will be described.
(1) Holding glasses In such a configuration, the arms 110 and 110 are locked to the upper casing 2 or the continuous casing 4 by locking means (not shown) at a position near the upper casing 2. Accordingly, the lens pressing shafts 113L, 114L and 113R, 114R can be held at the retracted positions that are largely separated upward from the left and right Hartmann pattern plates 54 and 66. Further, by releasing the downward movement restriction of the arms 110 and 110 by the locking means, the slide plate 105 can be moved downward along the guide rods 101 and 102 via the bearings 106 and 106 and the guide portion 107. Become. In addition, since the slide plate 105 is biased downward by the coil spring 109, the downward movement restriction of the arms 110, 110 by the locking means is released in the state where the operation portions (operation knobs) 110b, 110b are gripped. After that, by moving the operation units (operation knobs) 110b and 110b downward, the arms 110 and 110 and the lens pressing shafts 113L and 114L and 113R and 114R can be gently moved downward.

  The opposing surfaces of the frame holding members 28 and 29 are equally spaced from the centers of the pattern plates 54 and 66 (the measurement optical axes OL and OR of the left and right measurement optical systems SL and SR). Moreover, the link plate 118 is moved to the right side in FIG. 20 by pulling the frame holding member 28 toward the near side (right side in FIG. 20) against the spring force of the coil spring 128. Accordingly, the rotating plate 125 is rotated counterclockwise about the support screw 124, the link plate 119 is moved to the left in FIG. 20, and the distance between the frame holding members 28 and 29 is increased. Become. At this time, the distance between the frame holding members 28 and 29 is moved in the direction in which the distance increases by the same amount.

  On the contrary, by releasing this tensile force, the link plates 118 and 119 and the rotating plate 125 are operated in reverse to the above by the spring force of the coil spring 128, and the interval between the frame holding members 28 and 29 is narrowed. become. At this time, the interval between the frame holding members 28 and 29 is moved in the direction in which the interval is reduced by the same amount.

  The opposing surfaces of the frame holding members 28 and 29 are equally spaced from the centers of the pattern plates 54 and 66 (the measurement optical axes OL and OR of the left and right measurement optical systems SL and SR).

  Therefore, even if the distance between the frame holding members 28 and 29 is increased or decreased, the distance from the frame holding member 28 to the center of the pattern plates 54 and 66 (measurement optical axes OL and OR of the left and right measurement optical systems SL and SR). The distance and the distance from the frame holding member 29 to the centers of the pattern plates 54 and 66 (measurement optical axes OL and OR of the left and right measurement optical systems SL and SR) are always equal.

  Incidentally, in order to measure the refraction characteristics and the like of the left and right spectacle lenses LL and LR of the spectacles 5, the left and right spectacle lenses LL and LR are brought into contact with the lens receiving shafts 100L and 100R, and the left and right spectacle lenses LL and LR are measured. Must be pressed from above by the lens pressing shafts 113L, 114L and 113R, 114R.

  For this purpose, first, the distance between the frame holding members 28 and 29 is as described above by pulling the frame holding member 28 toward the front side in a state where the lens holding shafts 113L and 114L and 113R and 114R are held at the above-mentioned retracted positions. The glasses frame MF of the glasses 5 can be disposed between the frame holding members 28 and 29. In this state, the glasses frame MF of the glasses 5 is disposed between the frame holding members 28 and 29, and the nose pads NP and NP of the glasses 5 are in contact with and supported by the left and right side surfaces 135c and 135d of the nose contact support member 135. Thus, the bridge B of the glasses 5 is positioned at the center in the left-right direction of the apparatus main body 1, and the pair of right measuring optical systems SL, SR ( (Same as in FIG. 13). At this time, the temples LT and RT are disposed on the left and right sides of the lower casing 3.

  Next, the bridge B of the glasses 5 is pressed, and the nosepiece support member 135 is pushed down against the spring force of the coil spring 134, whereby the rear refracting surfaces (lower surfaces) of the left and right eyeglass lenses LL, LR of the glasses 5 are obtained. ) On the pattern plates 54 and 66 which are Hartmann plates as shown in FIG. On the other hand, the tensile force is gradually released from the frame holding member 28 to narrow the distance between the frame holding members 28 and 29, and the eyeglass frame MF of the glasses 5 is held between the frame holding members 28 and 29. At this time, the distance between the frame holding members 28 and 29 is narrowed so that the distance from the frame holding member 28 to the center of the pattern plates 54 and 66 is always equal to the distance from the frame holding member 29 to the centers of the pattern plates 54 and 66. . For this reason, even if the glasses frame MF is arranged in a state of being biased toward the front side or the rear side, the frame holding member 28 or 29 is pressed and displaced on the side opposite to the side on which the glasses frame MF is biased, and the nose The NP and NP are moved in the longitudinal direction of the nosepiece support member 135. Finally, the center line in the front-rear direction of the left and right eyeglass lenses LL, LR of the glasses 5 is substantially the center of the pattern plates 54, 66 (measurement optical axes OL, OR of the left and right measurement optical systems SL, SR). The glasses frame MF is sandwiched between the frame holding members 28 and 29 in the matched state.

  After this, the restriction of the downward movement of the arms 110, 110 by the locking means is released in a state where the operation parts (operation knobs) 110b, 110b are gripped, and the operation parts (operation knobs) 110b, 110b are moved downward. Then, the arms 110, 110 and the lens holding shafts 113L, 114L, 113R, 114R are gently moved downward to move the lens holding shafts 113L, 114L, 113R, 114R to the upper surfaces (front refractive surfaces) of the left and right eyeglass lenses LL, LR. ) The upper part is pressed by the spring force of the coil spring 109. In this state, as shown in FIG. 29, the arms 110 and 110 and the lens pressing shafts 113L and 114L and 113R and 114R are positioned at the lower lens pressing position.

Two lens holding shafts 114L and 114R are provided, the lens holding shafts 114L and 114L are arranged symmetrically around the plane Sc, and the lens holding shafts 114R and 114R are arranged symmetrically around the plane Sc. It is. Accordingly, the upper surface of the spectacle lens LL is pressed against the lens receiving shaft 100L at three points, that is, lens pressing shafts 113L, 114L, and 114L, and the upper surface of the spectacle lens LR is pressed against the lens receiving shaft 100R. , 114R. As a result, the spectacle lenses LL and LR are held in a direction in which the front-rear direction is horizontal by the spring force of the coil spring 109.
(2) Refractive characteristic measurement On the other hand, the calculation control circuit 69 turns on the LEDs 49 and 50 of the measurement optical system SL in order to measure the spectacle lens LL. At this time, the measurement light beam from the LED 49 is reflected by the dichroic mirror 53 and the total reflection mirror M, then converted into a parallel light beam by the collimator lens 52 and projected onto the spectacle lens LL. Accordingly, the measurement light beam that has passed through the spectacle lens LL passes through the pattern plate 54 and is guided to the CCD 60 via the field lens 55, the reflection mirrors 56 and 57, the optical path combining prism 58, and the imaging lens 59. A pattern image of the putter plate 54 is formed on the top.

  Further, the measurement light beam from the LED 50 is transmitted through the dichroic mirror 53 and reflected by the total reflection mirror M, then converted into a parallel light beam by the collimator lens 52 and projected onto the spectacle lens LL. Accordingly, the measurement light beam that has passed through the spectacle lens LL passes through the pattern plate 54 and is guided to the CCD 60 via the field lens 55, the reflection mirrors 56, 57, 57 a, the optical path synthesis prism 58, and the imaging lens 59. Then, a pattern image of the putter plate 54 is formed on the CCD 60.

  Then, the arithmetic control circuit 69 measures the refraction characteristics of each part of the spectacle lens LL from the state of the pattern image formed on the CCD 60, and obtains refraction characteristic mapping data.

  Thereafter, the arithmetic control circuit 69 turns on the LEDs 61 and 62 of the measurement optical system SR in order to measure the spectacle lens LR. At this time, the measurement light beam from the LED 61 is reflected by the dichroic mirror 65 and the total reflection mirror M, then converted into a parallel light beam by the collimator lens 64 and projected onto the spectacle lens LR. Accordingly, the measurement light flux that has passed through the spectacle lens LR passes through the pattern plate 66 and is guided to the CCD 60 via the field lens 67, the reflection mirrors 68 and 68a, the optical path synthesis prism 58, and the imaging lens 59, and the CCD 60 A pattern image of the putter plate 66 is formed on the top.

  Further, the measurement light beam from the LED 62 is transmitted through the dichroic mirror 65 and reflected by the total reflection mirror M, then converted into a parallel light beam by the collimator lens 64 and projected onto the spectacle lens LR. Accordingly, the measurement light beam that has passed through the spectacle lens LR passes through the pattern plate 66 and is guided to the CCD 60 via the field lens 67, the reflection mirror 68, the optical path synthesis prism 58, and the imaging lens 59. A pattern image of the putter plate 54 is formed.

  Then, the arithmetic control circuit 69 measures the refraction characteristics of each part of the spectacle lens LR from the state of the pattern image formed on the CCD 60, and obtains refraction characteristic mapping data. Further, the arithmetic control circuit 69 can transmit the distance between the optical axes and the refraction characteristics thus obtained to other ophthalmic apparatuses (not shown) via transmission means (network, cable, wireless).

  In this embodiment, rod-shaped lens receiving shafts 100L and 100R are used for the lens receiver, so that the support area of the spectacle lens by the lens receiver is minimized, so that the area where the lens receiver interferes with the measurement light beam during refraction measurement is minimized. Thus, the distribution of the refractive characteristics of the spectacle lens can be measured. In the actual example described above, the lens receiver is formed in a rod shape (pin shape), but is not necessarily limited to this configuration. For example, the lens receiver may be formed in a conical shape so that the spectacle lens can be supported by a point with the conical lens receiver.

  In addition, the radius of curvature of the lower surface of the spectacle lens (rear refracting surface) varies depending on the refractive power of the spectacle lens and the lens material of the spectacle lens. It can be obtained accurately.

  However, since the left and right spectacle lenses LL and LR of the spectacles are simultaneously supported, the optical axes of the left and right spectacle lenses LL and LR and the lens receivers cannot always coincide with each other. When the spectacle lens is supported by a lens receiver or the like comprising the lens support shaft, there may be a state in which the spectacle lens support state is not constant. However, as in Koike in this embodiment, the spectacle lens is supported by a point with a single lens receiver so that the spectacle lens is supported by a cylindrical lens receiver or a lens receiver including a large number of lens support shafts. The left and right eyeglass lenses can be stably supported as compared to the above.

  Furthermore, in the second embodiment of the present invention, the lens pressing shafts 113L and 113R of the left and right eyeglass lenses LL and LR are made one, respectively. However, the lens pressing shafts 113L and 113R are 2 in the same manner as the lens pressing shafts 114L and 114R. Can be provided one by one.

Embodiment 3 of the Invention

  In the second embodiment of the present invention described above, the nosepiece support member and the lens pressing member are provided, but these are not necessarily required. For example, as shown in FIG. 32, rod-shaped lens receiving shafts 100L and 100R may be provided on the pattern plates 54 and 66, respectively. Since other configurations and operations are the same as those of the second embodiment, description thereof will be omitted.

  According to this configuration, the refractive characteristics of the left and right spectacle lenses LL and LR can be measured simply by bringing the rear refractive surfaces of the spectacle lenses LL and LR of the spectacles 5 into contact with the upper ends of the lens receiving shafts 100L and 100R. In this case, the refractive characteristics of the eyeglass lenses LL and LR can be easily and simultaneously measured simply by grasping the temples RT and LT of the eyeglasses 5 or holding the eyeglass frames MF of the left and right eyeglass lenses LL and LR by hand. The spectacle frame MF has lens frames LF and RF, and the spectacle lenses LL and LR are framed in the lens frames LF and RF.

Embodiment 4 of the Invention

  The fourth embodiment of the present invention is a configuration in which a frame support device 300 as shown in FIGS. 33 and 34 is provided in the lower casing 3 in the configuration of the third embodiment of the present invention. The frame support device 300 supports the left and right lens frames LF and RF of the glasses 5, and descends by the weight of the glasses 5 to bring the glasses lenses LL and LR into contact with the upper ends of the lens receiving shafts 100L and 100R. Used. The frame support device 300 includes a left support device 300L and a right support device 300R.

  The left support device 300L and the right support device 300R include brackets 301 and 302 that are integrally provided on the inner surface of the side wall 3a of the lower housing portion 3 with a vertical space therebetween, and side portions of the upper wall 7 and the brackets 301 and 302. Between the brackets 301 and 302, and a support shaft 303 that extends vertically through the frame, a frame support arm 304 that is integrally provided at the upper end of the support shaft 303 and extends in the front-rear direction. And a coil spring (biasing means) 306 inserted between the bracket 302 and the flange 305 and having a support shaft 303 inserted therethrough.

  The coil spring 306 biases the support shaft 303 upward to position the arm 304 above the upper ends of the lens receiving shafts 100L and 100R. Further, the spring force (biasing force) of the coil spring 306 is set to be very weak, and is bent and compressed by the weight of the glasses 5.

  According to this configuration, when the left and right lens frames LF and RF of the glasses 5 are placed on the arms 304 and 304 of the left support device 300L and the right support device 300R, the coil springs 306 and 306 are compressed by their own weight. The left and right support shafts 303 and 303 and the arms 304 and 304 are displaced downward, and the rear refractive surfaces of the lens frames LF and RF of the spectacle lenses LL and LR are supported by the upper ends of the lens receiving shafts 100L and 100R. The At this time, the arms 304 and 304 prevent the lens frames LF and RF from falling downward in the front-rear direction.

  In this state, the refractive characteristics of the left and right eyeglass lenses LL and LR are measured in the same manner as described above.

According to this configuration, the refractive characteristics of the spectacle lenses LL and LR can be measured simultaneously by simply placing the left and right lens frames LF and RF of the spectacles 5 on the arms 304 and 304 without supporting the spectacles 5 by hand. Can do.
(Other 1)
In the embodiment of the present invention, an example in which a display device is not provided is shown. However, for example, a color liquid crystal display 200 is provided on the front surface of the upper housing portion 2 of the device main body 1 to display the liquid crystal display (display). Means) 200 can also display the mapping of the refraction characteristics of the spectacle lenses LL and LR using the mapping data. Further, the liquid crystal display 200 can display the distance between the optical axes of the spectacle lenses LL and LR, the above-described refraction characteristics, and the like.

Further, the nosepiece support member 135 can be held on the front wall 4a of the continuous casing portion 4 so as to be movable up and down. Note that the measurement is possible even if the nose support member 135 is not necessarily provided.
(Other 2)
Furthermore, in the first embodiment of the present invention described above, the nosepiece support member 45 is held by the frame holding member 29 so as to be displaced up and down, but is not necessarily limited thereto. For example, the nosepiece support member 45 is positioned between the left and right lens receiving mechanisms 80L and 80R and fixed on the upper wall 7, and the nosepiece support member 45 supports the glasses, and the glasses lenses LL, The height to the lower surface (rear refracting surface) of the LR may be measured by the lens receiving shafts 86 and 86 of the lens receiving mechanisms 80L and 80R.

  In this case, a feed screw mechanism that is rotationally driven by a drive motor is used as the lifting means 83, 83 of the lens receiving mechanisms 80L, 80R, and the lens receiving shaft 86 is driven to move up and down by this feed screw mechanism. Then, by using a pulse motor as the drive motor, the number of drive pulses of the drive motor is counted, and the elevation amount of the upper end of the lens receiving shaft 86 is obtained from the counted number, whereby the upper end of the lens receiving shaft 86 is increased. Thus, the height to the lower surface (rear refracting surface) of the spectacle lenses LL and LR of the spectacles can be obtained. By doing so, it is possible to accurately determine the height of the spectacle lenses LL and LR to the lower surface (rear refracting surface) and accurately measure the refractive characteristics of the spectacle lenses LL and LR.

  In the first embodiment of the present invention, the upper end portion of the scale main body (not shown) of the linear scale or the magne scale extending downward is held by the arm 85 and the scale main body is attached to the side surface of the rotary table 82 or the lifting means 83. As a configuration in which a linear scale or magnetic scale reading head for optically or magnetically reading the amount of movement is attached, the height of the tip (upper end) of the lens receiving shaft 86 is measured by measuring means such as this linear scale or magnetic scale. You may do it.

  As described above, the lens meter according to the embodiment of the present invention includes the projection optical system (47L, 47R) for projecting the measurement light beam onto the lenses (glasses lenses LL, RL) of the glasses 5, and the lenses of the glasses 5. (Measurement optical system (SL, SR) provided with a light receiving optical system (48L, 48R) provided with a light receiving element (CCD 60) for receiving a measurement light beam that has passed through (glasses lenses LL, RL), and the projection optical system (47L). , 47R) and a lens (lens receiving shaft 86) support for supporting the lenses of the glasses 5 (glasses lenses LL, RL) disposed between the light receiving optical systems (48L, 48R). In addition, the lens meter includes holding members 28 and 29 that abut against the glasses 5 supported by the lens receiver (lens receiving shaft 86) from the front and rear, and clamp the glasses from the front and rear, and the lens receiver (lens receiving shaft 86). ) And a lens receiving mechanism 80 movably movable at a measuring optical path of the measuring optical system (SL, SR) and a retracted position outside the measuring optical path (SL, SR), and the glasses 5 are connected to the holding member 28, 29, a control circuit (arithmetic control circuit 69 ") that controls the lens receiving mechanism 80 and retracts the lens receiver (lens receiving shaft 86) to the retracted position after being sandwiched from the front and rear by 29.

  According to this configuration, the distance between the lower surface of the spectacle lens and the light receiving means of the light receiving optical system on the measurement optical axis of the optical system that measures the left and right spectacle lenses of the spectacles is made constant with a simple configuration, and the spectacle lens is accurate. Can be measured.

  Further, the measurement optical system of the lens meter according to the embodiment of the present invention is provided in a pair on the left and right.

  Furthermore, in the lens meter according to the embodiment of the present invention, a nosepiece support mechanism is provided which is positioned between the lens receivers when the lens receivers are respectively positioned in the measurement optical paths of the left and right measurement optical systems.

It is a perspective view of the lens meter concerning this invention. It is sectional drawing of the state which removed the lens receiving mechanism in the opening part of the lens meter of FIG. It is a schematic explanatory drawing which shows the relationship between the opening of FIG. 2, and a lens receiving mechanism. 3 is a plan view showing the relationship between the lens acceptance mechanism and glasses. It is sectional drawing of the part of the lens holding | suppressing mechanism shown in FIG. It is sectional drawing which follows the CC line of FIG. FIG. 7 is an operation explanatory diagram of FIG. 6. It is sectional drawing of the attaching part of the nosepiece support mechanism of FIG. It is an enlarged view of the attaching part of the nosepiece support mechanism to the frame holding member of FIG. It is sectional drawing which follows the DD line | wire of FIG. It is explanatory drawing which looked at the nose pad support mechanism of FIG. 8 from the arrow E direction. (A) is sectional drawing which follows the FF line | wire of FIG. 11, (b) is a schematic perspective view of a nosepiece support member, (c) is a schematic perspective view which shows the modification of a nosepiece support member. It is explanatory drawing of the measurement optical system of the lens meter shown in FIGS. It is a perspective view of the lens meter which concerns on Embodiment 2 of this invention. It is a side view of the lens meter of FIG. It is a front view of the state which has not set the spectacles of the lens meter of FIG. It is a top view of the lens meter of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the GG line of FIG. It is sectional drawing which follows the HH line of FIG. It is sectional drawing which follows the II line | wire of FIG. It is a front view of one link board of FIG. It is a front view of the other link board of FIG. It is sectional drawing of the nosepiece support mechanism shown in FIG. It is sectional drawing seen from the arrow J direction of FIG. It is sectional drawing which follows the KK line | wire of FIG. It is explanatory drawing which shows the optical system of the lens meter shown in FIGS. FIG. 30 is a front view of a state in which glasses are set as shown in FIG. 14 on the lens meter of FIG. 16 with the illustration of the frame holding member on the near side of FIG. 29 omitted. It is a principal part expanded sectional view which shows the support state of the spectacle lens of the spectacles of FIG. It is a perspective view which shows the example which provided the display apparatus in the lens meter in FIGS. It is a perspective view which shows the other example of the lens meter of this invention. It is a perspective view which shows the other example of the lens meter of this invention. It is principal part sectional drawing of FIG.

Explanation of symbols

5 ... Glasses 26 ... Lens holding shaft (Lens holding member)
28, 29 ... Frame holding member (holding member)
48L, 48R ... light receiving optical system 47L, 47R ... projection optical system 60 ... CCD (light receiving element)
69. Arithmetic control circuit (control circuit)
80 ... Lens receiving mechanism 86 ... Lens receiving shaft (lens receiving)
LL, RL ... Eyeglass lenses LL, RL (lenses)
SL, SR ... Measurement optical system

Claims (3)

A projection optical system that projects a measurement light beam onto a lens of the glasses, and a measurement optical system that includes a light receiving optical system provided with a light receiving element that receives the measurement light beam that has passed through the lens of the glasses;
In a lens meter comprising a lens receiver for supporting a lens of the glasses disposed between the projection optical system and the light receiving optical system,
A holding member that contacts the glasses supported by the lens receiver from the front and the back to sandwich the glasses from the front and the back;
A lens receiving mechanism that enables the lens receiver to move at a measurement optical path of the measurement optical system and a retracted position outside the measurement optical path;
A lens meter comprising: a control circuit that controls the lens receiving mechanism to retract the lens receiver to the retracted position after the glasses are sandwiched from the front and rear by the holding member.   The lens meter according to claim 1, wherein the measurement optical system is provided in a pair of left and right. The lens meter according to claim 2, wherein a nosepiece support mechanism is provided between the lens receivers when the lens receivers are respectively positioned in the measurement optical paths of the left and right measurement optical systems.

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