JP2020125937A - Eyeglass lens shape measuring device - Google Patents

Abstract

To provide an eyeglass lens shape measuring device with which it is possible to save the space of the device and measure the shape of lens face of an eyeglass lens by a simple configuration.SOLUTION: The eyeglass lens shape measuring device comprises: first movement means 230 for rotationally moving a first probe 231 around a first rotation axis N2 to bring into contact with the front face of an eyeglass lens; second movement means 240 for rotationally moving a second probe 241 different from the first probe around a second rotation axis N2 to bring into contact with the rear face of the eyeglass lens, the second movement means capable of moving independently of the first movement means; control means for controlling the first and second movement means; and shape information acquisition means for bringing the first probe into contact with the front face of the eyeglass lens by the control means, acquiring the shape information of the front face of the eyeglass lens on the basis of the position information of the first probe, bringing the second probe into contact with the rear face of the eyeglass lens, and acquiring the shape information of the rear face of the eyeglass lens on the basis of the position information of the second probe.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an eyeglass lens shape measuring device that measures the shape of a lens surface of an eyeglass lens.

In the eyeglass lens shape measuring device, the shape of the lens surface of the eyeglass lens is measured by bringing a probe into contact with the front surface and the rear surface of the eyeglass lens. For example, in Patent Document 1, the spectacle lens shape measuring device includes two measuring elements, one of which is in contact with the front surface of the spectacle lens and the other of which is in contact with the rear surface of the spectacle lens, so that the shape of each lens surface is Is being measured.

JP, 2006-334702, A

By the way, in the eyeglass lens shape measuring device of Patent Document 1, each drive mechanism for linearly moving each probe in the edge thickness direction of the eyeglass lens is required. Therefore, there is a problem that the device configuration becomes complicated and the device becomes large.

In view of the above-mentioned conventional technology, the present disclosure aims to provide a spectacle lens shape measuring device capable of measuring the shape of the lens surface of a spectacle lens with a simple configuration while saving the device space. ..

In order to solve the above-mentioned subject, the present disclosure is characterized by having the following configurations.

(1) An eyeglass lens shape measuring apparatus according to a first aspect of the present disclosure is an eyeglass lens shape measuring apparatus that measures the shape of a lens surface of an eyeglass lens, the eyepiece lens shape measuring apparatus having a first tracing stylus. Has a second moving element which is different from the first measuring element in that the first moving means is configured to pivotally move in the edge thickness direction of the spectacle lens about the first rotation axis to contact the front surface of the spectacle lens. A second moving unit that pivotally moves the second probe in the edge thickness direction of the spectacle lens about a second rotation axis to contact the rear surface of the spectacle lens, wherein the first moving unit is Second moving means independently movable, control means for controlling the first moving means and the second moving means, and the first measuring element brought into contact with the front surface of the spectacle lens by the control means, The shape information of the front surface of the spectacle lens is acquired based on the positional information of the first measuring element, the second measuring element is brought into contact with the rear surface of the spectacle lens, and the spectacles are based on the positional information of the second measuring element. Shape information acquisition means for acquiring the shape information of the rear surface of the lens.

It is an internal block diagram of a processing apparatus. It is a perspective view of a lens shape measuring unit. It is a front view of a lens shape measuring unit. It is a right view of a lens shape measuring unit. It is a figure which shows the control system of a processing apparatus. It is a figure explaining the gap between the tip of the 1st probe and the 2nd probe, and the measurement start point of a lens. It is a figure explaining adjustment of the relative position of the 1st probe and the 2nd probe and a lens using the thickness of an edge.

An example, which is one of typical embodiments in the present disclosure, will be described with reference to the drawings. The technology of the present disclosure is applied to an eyeglass lens shape measuring apparatus for measuring the shape of a lens surface of an eyeglass lens, but at least a part of the technology of the present disclosure is an apparatus different from the eyeglass lens shape measuring apparatus. May be applied to. As an example, it may be applied to an eyeglass lens peripheral edge processing apparatus including a processing tool for processing the peripheral edge of an eyeglass lens. That is, the spectacle lens edge processing device may have a function as a spectacle lens shape measuring device. In the embodiment described below, such a case is taken as an example.

FIG. 1 is an internal configuration diagram of an eyeglass lens peripheral edge processing apparatus 1 (hereinafter, simply referred to as processing apparatus 1). Hereinafter, the X direction shown in FIG. 1 is represented as the left-right direction of the processing apparatus 1, the Y direction is represented as the vertical direction of the processing apparatus 1, and the Z direction is represented as the front-back direction of the processing apparatus 1.

The processing apparatus 1 includes a main body base 10, a lens holding unit 100, a lens shape measuring unit 200, a first lens processing unit 300, a second lens processing unit 400, and the like. Each unit is mounted on the main body base 10. The lens holding unit 100 holds the lens LE by the lens chuck shaft 110 so as to be rotatable and movable in the XYZ directions. The lens shape measuring unit 200 measures the shape of the lens surface of the lens LE (at least one of the front surface and the rear surface of the lens LE) and the outer shapes of the demo lens, the template, and the lens to be processed. The first lens processing unit 300 processes the lens LE with the first processing tool. The second lens processing unit 400 processes the lens LE with the second processing tool.

<Lens holding unit>
The lens holding unit 100 includes a lens chuck shaft 110 (110L and 110R), a carriage 111 (111L and 111R), an X-direction moving unit 120, an axial distance changing unit 130, and the like.

The lens chuck shaft 110 extends in the X direction and holds the lens LE. The lens chuck shaft 110 is coaxially and rotatably held by a carriage 111. The lens chuck shaft 110R is moved to the lens chuck shaft 110L side by driving the motor 113 attached to the carriage 111R. As a result, the lens LE is sandwiched between the lens chuck shafts 110L and 110R. Further, the lens chuck shafts 110L and 110R are driven by a motor 114 attached to the carriage 111R, and are rotated in synchronization with each other via a rotation transmission mechanism (for example, a gear mechanism) not shown in the drawing. It is rotated around S1.

The X-direction moving unit 120 moves the lens chuck shaft 110 in the X direction. The X-direction moving unit 120 is attached to the shafts (shafts 121 and 122) extending in the X-direction, a moving support base 123 that is movable along the shafts and is connected to the carriage 111, a motor 124, and a rotating shaft of the motor 124. And a ball screw (not shown) that extends in parallel with. When the motor 124 is driven, a ball screw (not shown) attached to the rotation shaft of the motor 124 rotates, and the moving support base 123 and the carriage 111 move in the X direction. The motor 124 is provided with an encoder 125, and the movement position of the carriage 111 in the X direction is obtained by detecting the rotation of the motor 124.

The inter-axis distance variation unit 130 varies the inter-axis distance between the rotation axis S1 of the lens chuck shaft 110 and the processing tool rotation axis (first processing tool rotation axis S2 or second processing tool rotation axis S3). In the present embodiment, the inter-axis distance variation unit 130 is configured so that the lens LE sandwiched between the lens chuck shafts 110 and a measuring element (first measuring element 231 and second measuring element 241) described later are relative to each other. It also serves as a mobile unit for changing the positional relationship.

The inter-axis distance variation unit 130 includes a shaft 131 fixed to the moving support base 123, a motor 132, a ball screw 133 attached to the rotation shaft of the motor 132 and extending in parallel with the shaft 131, and the like. When the motor 132 is driven, the ball screw 133 attached to the rotating shaft of the motor 132 rotates, and the moving support base 123 and the carriage 111 rotate around the rotating shaft of the shaft 121. The motor 132 is provided with an encoder 134, and the movement position of the carriage 111 in the Z direction is obtained by detecting the rotation of the motor 132.

<Lens shape measurement unit>
2 to 4 are configuration diagrams of the lens shape measuring unit 200. FIG. 2 is a perspective view of the lens shape measuring unit 200. FIG. 3 is a front view of the lens shape measuring unit 200. FIG. 4 is a right side view of the lens shape measuring unit 200.

The lens shape measuring unit 200 is provided behind the carriage 111. The lens shape measuring unit 200 includes a fixed part 210 and a movable part 220. The fixed portion 210 is attached to the main body base 10. The fixed portion 210 extends in the X direction (in other words, the rotation axis S1 direction of the lens chuck shaft 110), the shaft 211 that supports the movable portion 220, and the movement of the movable portion 220 in the front direction (direction toward the lens chuck shaft 110). A pin 212 that limits the movement of the movable part 220 in the backward direction (a direction away from the lens chuck shaft 110), a fixing plate 214 that fixes the shaft 211 and the pins 212 and 213, and the like.

The movable portion 220 pivotally moves around the rotation axis N1 of the shaft 211 with respect to the fixed portion 210. In other words, the movable part 220 is inclined with respect to the fixed part 210 in the front-rear direction (direction A in FIGS. 2 to 4) about the rotation axis N1 of the shaft 211. Further, the movable part 220 pivotally moves around the rotation axis N2 of the shaft 215 with respect to the fixed part 210. In other words, the movable part 220 is inclined with respect to the fixed part 210 in the left-right direction (direction B in FIGS. 2 to 4) about the rotation axis S2 of the shaft 215.

The movable part 220 includes a first moving part 230 that inclines a later-described first probe 231 with respect to the fixed part 210 in the B direction, and a first moving part 230 that inclines a later-described second probe 241 with respect to the fixed part 210 in the B direction. The second moving part 240, the fixed part 210, and the third moving part 250 for inclining the first probe 231 and the second probe 241 in the A direction are provided.

In this embodiment, the bearing 251 of the third moving portion 250 is attached to the shaft 211 of the fixed portion 210, and the bearing of the first moving portion 230 is attached to the shaft 215 of the third moving portion 250. The first moving portion 230, the second moving portion 240, and the third moving portion 250 are integrated by attaching 501 and the bearing 242 of the second moving portion 240, respectively. Therefore, the tracing stylus (the first tracing stylus 231 and the second tracing stylus 241) can be tilted in the B direction about the rotation axis N2 of the shaft 215. That is, the lens LE held by the lens chuck shaft 110 can be moved in the edge thickness direction. Further, the tracing stylus (the first tracing stylus 231 and the second tracing stylus 241) can be tilted in the A direction about the rotation axis N1 of the shaft 211. That is, the tracing stylus can move in the radial direction of the lens LE held by the lens chuck shaft 110.

<First moving part>
The first moving unit 230 has a first tracing stylus 231 for measuring the shape of the front surface of the lens LE. The first moving unit 230 pivotally moves the first tracing stylus 231 in the edge thickness direction of the lens LE around the first rotation axis (in this embodiment, the rotation axis N2), and contacts the front surface of the lens LE. ..

The first moving unit 230 includes a bearing 232 inserted into the shaft 215, a motor 233 attached to the fixed unit 210, a gear 234 connected to the rotation shaft of the motor 233, a gear 235 meshed with the gear 234 fixed to the bearing 232, and a bearing. A support shaft 236 fixed to 232 and extending in the Z direction in a columnar shape, an arm 237 fixed to the support shaft 236, a first probe 231 provided at the tip of the arm 237, and the like. The arm 237 is provided with a waterproof plate 238 at a position rearward of the first tracing stylus 231 for preventing intrusion of machining water flowing into the machining chamber.

For example, the motor 233 may be a pulse motor. For example, by driving the motor 233, the gear 234 connected to the rotation shaft of the motor 233 rotates in the Bb direction, and further, the gear 235 meshing with the gear 234 rotates in the Ba direction. As a result, the support shaft 236 tilts in the Ba direction, and the first probe 231 provided on the support shaft 236 via the arm 237 tilts in the Ba direction. The support shaft 236 is always biased in the Bb direction by a spring (not shown) so as to be arranged at the initial position (in this embodiment, the support shaft 236 is perpendicular to the rotation axis N2 of the shaft 215). ing. Therefore, the first tracing stylus 231 is always biased toward the second tracing stylus 241. The first tracing stylus 231 inclined in the Ba direction by driving the motor 233 repels in the Bb direction by the urging force of a spring (not shown), and returns to the initial position when the excitation of the motor 233 is released.

A change in the turning angle of the support shaft 236 in the Ba direction (in other words, the position where the support shaft 236 moves in the Ba direction around the rotation axis N2) is detected by the first detector 239. For example, the first detector 239 may be an encoder. For example, the light emitting element 239a included in the first detector 239 may be attached to the support shaft 253 facing the support shaft 236, and the light receiving element 239b included in the first detector 239 may be provided on the support shaft 236. The turning angle of the support shaft 236 is obtained based on the phase difference between the light emission signal of the light emitting element 239a and the light reception signal of the light receiving element 239b that change due to the inclination of the support shaft 236. In the present embodiment, the position information of the first probe 231 in the X direction is obtained using the turning angle of the support shaft 236.

<Second moving part>
The second moving unit 240 has a second tracing stylus 241 for measuring the shape of the rear surface of the lens LE. The second moving unit 240 pivotally moves the second tracing stylus 241 in the edge thickness direction of the lens LE about the second rotation axis (in this embodiment, the rotation axis N2), and brings it into contact with the rear surface of the lens LE. ..

The second moving unit 240 includes a bearing 242 inserted into the shaft 215, a support shaft 243 fixed to the bearing 242 and extending in the Z direction in a columnar shape, an arm 244 fixed to the support shaft 243, and a second measurement provided at the tip of the arm 244. Child 241 and the like. The arm 244 is provided with a waterproof plate 245 at a position rearward of the tracing stylus 241 for preventing intrusion of machining water flowing into the machining chamber.

The support shaft 243 is constantly biased in the Ba direction by the spring 259 so as to be arranged at the initial position (in this embodiment, the position where the support shaft 243 is perpendicular to the rotation axis N2 of the shaft 215). Therefore, the second tracing stylus 241 is always biased toward the first tracing stylus 231.

The change in the turning angle of the support shaft 243 in the Bb direction (in other words, the position where the support shaft 243 moves in the Bb direction around the rotation axis N2) is detected by the second detector 246. For example, the second detector 246 may be an encoder. For example, the light emitting element 246a included in the second detector 246 may be attached to the support shaft 253 facing the support shaft 243, and the light receiving element 246b included in the second detector 246 may be provided on the support shaft 243. The turning angle of the support shaft 243 is obtained based on the phase difference between the light emission signal of the light emitting element 246a and the light reception signal of the light receiving element 246b that change due to the inclination of the support shaft 243. In this embodiment, the position information of the second probe 241 in the X direction is obtained by utilizing the turning angle of the support shaft 243.

The support shaft 243 is composed of a pillar portion 243a and a plate portion 243b which is provided left and right from the center of the pillar portion 243a and is formed thinner than the pillar portion 243a. The maximum value of the turning angle of the support shaft 243 in the B direction is determined by the left and right ends of the plate portion 243b contacting pins 254a and 254b described later. For example, in the present embodiment, the support shaft 243 is inclined from the central axis K1 of the support shaft 243 in the X direction by about 4 degrees in the Bb direction. Accordingly, the tip of the second tracing stylus 241 can move from the central axis K1 in the approximately X direction by a distance of about 10 mm. That is, the tip of the second tracing stylus 241 has a movement range of about 10 mm from the central axis K1 in the substantially X direction.

Further, the front and rear surfaces of the plate portion 243b come into contact with the pins 212 and 213, whereby the maximum value of the turning angle of the support shaft 243 (and the support shaft 236) in the A direction is determined. For example, in the present embodiment, the support shaft 243 is inclined from the center axis N2 of the support shaft 243 in the Z direction by about 4 degrees in the A direction. As a result, the side surface of the second tracing stylus 241 can move from the central axis N2 in the approximately Z direction by a distance of approximately 10 mm. That is, the side surface of the second tracing stylus 241 has a movement range of about 10 mm from the central axis N2 in the substantially Z direction.

<Third moving part>
The third moving unit 250 pivotally moves the second tracing stylus 241 in the radial direction of the lens LE around the third rotation axis (the rotation axis N1 in this embodiment), and moves the side surface of the second tracing stylus 241. , Demonstration lens, template, and the outer periphery (edge) of the lens to be processed.

The third moving part 250 includes a bearing 251 inserted into the shaft 211, a shaft 215 extending in the Z direction, a bearing 252 connected to the bearing 251 and inserted into the shaft 215, a support shaft 253 fixed to the bearing 252, and a first moving part 230. Not shown, which limits the inclination of the first moving portion 230 in the Bb direction, holds the initial position of the first moving portion 230 in the B direction, and allows the lens LE to move in the Bb direction. 258 for applying the measurement pressure of the second moving portion 240, a pin 254a for limiting the inclination of the second moving portion 240 in the Ba direction, a pin 254b for limiting the inclination of the second moving portion 240 in the Bb direction, and an initial portion of the second moving portion 240 in the B direction. A spring 259 that holds the position and applies a measurement pressure in the Ba direction to the lens LE is provided.

In the present embodiment, the pin (not shown) that limits the inclination of the first moving portion 230 in the Bb direction and the pin 254a that limits the inclination of the second moving portion 240 in the Ba direction may also be used. For example, in this case, a member (for example, a plate member) that can limit the tilt of the first moving unit 230 in the Bb direction and the tilt of the second moving unit 240 in the Ba direction is used. Good. For example, the thickness of such a member may be a thickness that maintains the tip of the first probe 231 and the tip of the second probe 241 at a predetermined distance (for example, 0.5 mm) at the initial position. ..

The support shaft 253 is arranged by an spring 256 connected to the fixed plate 214 and the bearing 252 so that the support shaft 253 is arranged at an initial position (a position where the support shaft 253 is perpendicular to the rotation axis N1 of the shaft 211 in this embodiment). , Aa direction is always urged. Therefore, the first tracing stylus 231 and the second tracing stylus 241 are always in the state of being biased toward the lens LE.

A change in the turning angle of the support shaft 253 in the Ab direction (in other words, the position where the support shaft 253 moves in the Ab direction around the rotation axis N1) is detected by the third detector 257. For example, the third detector 257 may be an encoder. For example, the light emitting element 257a included in the third detector 257 may be attached to the support shaft 253, and the light receiving element 257b included in the third detector 257 may be provided on the fixed plate 214. The turning angle of the support shaft 253 is obtained based on the phase difference between the light emission signal of the light emitting element 257a and the light reception signal of the light receiving element 257b that change due to the inclination of the support shaft 253. In the present embodiment, the turning angle of the support shaft 253 is used to obtain the position information of the second tracing stylus 241 in the Z direction.

The third moving unit 250 also has a role of suppressing damage to the probe that may occur when the shape of the lens surface of the lens LE is measured by the first moving unit 230 and the second moving unit 240. For example, when the tracing stylus is detached from the lens surface of the lens LE, the tracing stylus returns to the above-mentioned initial position by the biasing force of the spring. However, since the lens LE rotates around the rotation axis S1 of the lens chuck shaft 110, the outer periphery of the lens LE contacts the side surface of the tracing stylus, and the lens LE further presses the tracing stylus in the Ab direction. At this time, the third moving unit 250 releases the pressing force applied to the probe in the Ab direction, whereby damage to the probe can be suppressed.

In the present embodiment, in the lens shape measuring unit 200 having such a configuration, the movement locus M (see FIG. 6) of the first tracing stylus 231 and the second tracing stylus 241 in the B direction is substantially linear. The length of the support shaft 236 that supports the first probe 231 and the length of the support shaft 243 that supports the second probe 241 are determined. Further, the tip of the first tracing stylus 231 and the tip of the second tracing stylus 241 are arranged at symmetrical positions with a predetermined distance (for example, 0.5 mm) from the central axis K1 in the X direction.

Further, in the lens shape measuring unit 200 having such a configuration, the first tracing stylus 231 and the second tracing stylus 241 are on the movement locus of the lens chuck shaft 110 (that is, the lens chuck shaft 110 is the rotation axis of the shaft 121). The length of the arm 237 that supports the first tracing stylus 231, the length of the arm 244 that supports the second tracing stylus 241, and the length of these arms with respect to the lens chuck shaft 110 so that they are located on the locus that rotates around the center). The turning angle is determined. Since the tracing stylus is located on the movement trajectory of the lens chuck shaft 110, the shape of the front surface and the rear surface of the lens LE is measured by using the movement of the lens LE by the lens holding unit 100.

Further, in the lens shape measuring unit 200 having such a configuration, the first moving section 230 and the second moving section 240 are pivotally moved independently of each other. That is, the turning movement of the first probe 231 (inclination in the B direction) and the pivoting movement of the second probe 241 (inclination in the B direction) are performed independently of each other. Therefore, it is possible to perform one of the measurement of the front surface of the lens LE and the measurement of the rear surface of the lens LE using the first and second measurement elements 231 and 241 and then perform the other measurement. .. As an example, the other measuring element may be moved away from the lens LE by the rotational movement so that only one measuring element contacts the lens LE. Of course, it is also possible to perform the measurement of the front surface of the lens LE and the measurement of the rear surface of the lens LE at the same time by using the first measuring element 231 and the second measuring element 241.

Further, in the lens shape measuring unit 200 having such a configuration, when the front surface and the rear surface of the lens LE are measured, only when the lens LE is arranged between the first probe 231 and the second probe 241 respectively. Is controlled so as to swing the probe to widen its interval. As a result, when the lens LE is not being measured, a space in the processing chamber is secured and the processing chamber can be effectively used.

Further, in the lens shape measuring unit 200 having such a configuration, the first rotation axis of the turning movement of the first tracing stylus 231 by the first moving portion 230 and the turning movement of the second tracing stylus 241 by the second moving portion 240. And the second rotation axis of are coaxially arranged. As a result, it is possible to save the space of the device and to effectively utilize the space in the processing chamber, as compared with the configuration in which the respective rotary shafts are not coaxially arranged.

In the present embodiment, the first moving section 230 and the second moving section 240 also serve as the shaft 215, and the first probe 231 is attached to the shaft 215 so as to be rotatable about the first rotation axis. The second tracing stylus 241 is attached to the shaft 215 so as to be rotatable about the second rotation axis. In the present embodiment, this allows the axes of rotation of the respective measuring elements to be arranged coaxially. That is, the first rotating shaft of the first moving unit 230 and the second rotating shaft of the second moving unit 240 are arranged coaxially with the shaft 215. With such a configuration, part of the first moving unit 230 and the second moving unit 240 is shared, and the configuration becomes easier, leading to space saving and cost reduction of the device. Of course, the first moving unit 230 and the second moving unit 240 also serve as the shaft 215, but the respective measuring elements are rotated with respect to the shaft 215 so that the rotating axes of the respective measuring elements are arranged on different axes. It may be movably attached.

The lens shape measuring unit 200 according to the present exemplary embodiment is provided with the above-described configuration, and thus the lens surface shape measuring unit that measures the shape of the lens surface of the lens LE and the outer shape measuring unit that measures the outer shape of the lens LE. It also functions as a unit. However, in this embodiment, the lens shape measuring unit 200 may have at least a function as a lens surface shape measuring unit. That is, it is sufficient that the lens shape measuring unit 200 detects the movement of the tracing stylus (the first tracing stylus 231 and the second tracing stylus 241) in the B direction. In this case, the movable section 220 of the lens shape measuring unit 200 may be configured to include at least the first moving section 230 and the second moving section 240.

<First lens processing unit>
The first lens processing unit 300 is provided in front of the carriage 111. The first lens processing unit 300 includes a first processing tool 310 (a kind of peripheral processing tool for processing the peripheral edge of the lens LE), a spindle (grinding stone rotating shaft) 321, a motor 322, and the like. The first processing tool 310 includes a glass rough grindstone 311, a finishing grindstone 312, a flat mirror surface finishing grindstone 313, a plastic rough grindstone 314, and the like. On the finishing grindstone 312, a V groove (bevel groove) for forming a bevel on the lens LE and a flat processed surface are formed. The spindle 321 extends in the X direction and fixes each grindstone of the first processing tool 310 coaxially. The rotation shaft of the motor 322 is connected to the spindle 321. When the motor 322 is driven, the spindle 321 and the first processing tool 310 rotate around the first processing tool rotation axis S2. By bringing the lens LE sandwiched by the lens chuck shaft 110 into contact with the first processing tool 310, the peripheral edge of the lens LE can be subjected to rough processing, finishing processing, mirror surface processing, and the like.

<Second lens processing unit>
The second lens processing unit 400 is provided behind the carriage 111. The second lens processing unit 400 is arranged side by side with the lens shape measuring unit 200 outside the movement range of the lens shape measuring unit 200. The second lens processing unit 400 includes a second processing tool 410 (a kind of peripheral processing tool for processing the peripheral edge of the lens LE), a spindle (grinding stone rotating shaft) 421, a motor 422, and the like. The second processing tool 410 is composed of a chamfering grindstone, a grooved grindstone, and the like. The spindle 421 extends in the X direction and coaxially fixes each grindstone of the second processing tool 410. The rotation shaft of the motor 422 is connected to the spindle 421. When the motor 422 is driven, the spindle 421 and the second processing tool 410 rotate around the second processing tool rotation axis S3. By bringing the lens LE sandwiched by the lens chuck shaft 110 into contact with the second processing tool 410, it is possible to perform chamfering, grooving, or the like on the peripheral edge of the lens LE.

<Control part>
FIG. 5 is a diagram showing a control system of the processing apparatus 1. The control unit 50 includes a CPU (processor), a RAM, a ROM, and the like. For example, the CPU controls each member in the processing device 1. The RAM temporarily stores various information. The ROM stores various programs for controlling the operation of the processing apparatus 1, initial values, and the like. The controller 50 may be composed of a plurality of controllers (that is, a plurality of processors). For example, among the plurality of control units, one may control the driving of the first moving unit 230 (for example, the excitation of the motor 233 in this embodiment), and one may control the driving of the second moving unit 240.

Each motor (113, 114, 124, 233, 322, 422), each detector (125, 134, 239, 246, 257), monitor 20, memory 30, etc. are electrically connected to the control unit 50. ing. A touch panel function is added to the monitor 20, and the monitor 20 functions as an operation unit (controller). Note that the monitor 20 and the operation unit may be provided separately, and in this case, at least one of a mouse, a joystick, a keyboard, a mobile terminal, and the like may be used as the operation unit. The memory 40 is a non-transitory storage medium that can retain stored contents even when power supply is cut off. A hard disk drive, a flash ROM, a USB memory, or the like can be used as the memory 40. The memory 40 may store information (for example, target lens shape data) used when processing the peripheral edge of the lens LE.

<Control operation>
Hereinafter, the control operation for measuring the shape of the lens surface of the lens LE held by the lens chuck shaft 110 using the lens shape measuring unit 200 in the processing apparatus 1 will be described.

<Acquisition of target lens shape data>
Since the shape of the lens surface of the lens LE is measured based on the target lens shape data of the lens LE, the target lens shape data of the lens LE is first acquired. In this embodiment, the lens shape measuring unit 200 of the processing apparatus 1 is used to measure the outer shape data of the demo lens (or template) framed in the spectacle frame, so that the outer shape data of the demo lens is the lens LE. It is acquired as the target lens shape data. In this case, the demo lens is sandwiched by the lens chuck shaft 110, and the side surface of the second tracing stylus 241 is brought into contact with the outer circumference (edge) of the demo lens. The control unit 50 acquires the outer shape data (target lens shape data) over the entire circumference of the demo lens based on the movement position of the lens chuck shaft 110 and the turning angle at which the support shaft 253 turns in the A direction. Such target lens shape data is (rn, θn) (n=1, 2, n) using the radius vector length rn and the radius vector angle θn with the center of the lens LE (the rotation axis S1 of the lens chuck shaft 110) as a reference. ..., N). For example, in the present embodiment, the radius vector angle θn is 0.36 degrees, and data of 1000 points can be obtained by rotating the lens LE once.

It is also possible to acquire the target lens shape data by receiving the target lens shape data measured by a device different from the processing device 1 without using the lens shape measuring unit 200 of the processing device 1. In this case, the control unit 50 may acquire, as the target lens shape data of the lens LE, the inner shape data of the rim of the spectacle frame measured by using the device described in JP-A-2005-007536. Further, in this case, the control unit 50 may acquire the outer shape data of the demo lens, which is measured by using the device described in JP 2013-68488 A, as the target lens shape data of the lens LE.

<Contact between measuring element and lens>
The controller 50 brings at least one of the tip of the first probe 231 and the tip of the second probe 241 into contact with the lens surface of the lens LE. In the present embodiment, an example is given in which the controller 50 brings the tip of the first probe 231 into contact with the front surface of the lens LE and the tip of the second probe 241 contacts with the rear surface of the lens LE.

First, the control unit 50 drives the motor 233 to rotate the support shaft 236 in the Bb direction. For example, the control unit 50 excites the motor 233 and inputs a predetermined pulse signal (for example, 9 pulses or the like) to rotate the motor 233, thereby causing the support shaft 236 to rotate in the Ba direction at a predetermined angle (for example, 16 pulses). Incline only). As a result, the first tracing stylus 231 moves away from the second tracing stylus 241, and the distance between the first tracing stylus 231 and the second tracing stylus 241 in the X direction is widened.

Next, the control unit 50 drives the motor 124 to move the carriage 111 in the X direction, and also drives the motor 132 to move the carriage 111 in the Z direction. For example, the control unit 50 moves the carriage 111 in the X direction and the Z direction so that the lens LE sandwiched by the lens chuck shaft 110 is located between the first probe 231 and the second probe 241. ..

The control unit 50 releases the excitation of the motor 233 when the lens LE is arranged between the first and second measuring elements 231 and 241. As a result, the support shaft 236 pivotally moves in the Bb direction by the urging force of a spring (not shown), and the tip of the first probe 231 is pressed against the front surface of the lens LE and comes into contact therewith. Further, the control unit 50 drives the motor 124 to move the carriage 111 in the X direction, thereby bringing the lens LE close to the tip of the second tracing stylus 241. The second tracing stylus 241 (support shaft 243) is biased by the spring 259 so as to swivel in the Ba direction, so that the tip of the second tracing stylus 241 is pressed against the rear surface of the lens LE and comes into contact therewith. ..

In the present embodiment, the control unit 50 arranges the lens LE between the first probe 231 and the second probe 241 and then first drives the motor 124 to move the carriage 111 in the X direction. Thus, the rear surface of the lens LE may be pressed against and brought into contact with the tip of the second tracing stylus 241. The control unit 50 may stop the movement of the carriage 111 when the tip of the second tracing stylus 241 reaches a predetermined position. Next, the control unit 50 may release the excitation of the motor 233 to press the tip of the first tracing stylus 231 against the front surface of the lens LE to bring them into contact with each other.

<Alignment of contact point and lens>
In this embodiment, the control unit 50 acquires the position information of the tip of the first probe 231 and the position information of the tip of the second probe 241. For example, such position information may be represented by position coordinates in the X direction. Based on the position coordinates at the tip of the first probe 231 and the tip of the second probe 241, the control unit 50 causes the tips of the first probe 231 and the second probe 241 to determine the shape of the lens surface of the lens LE. The measurement is started at a position where the measurement is started, which is a position having a predetermined radius vector length rn and a radius vector angle θn (for example, a radius vector angle of 0 degree) in the target lens shape data.

Here, in the present embodiment, the tip 231a of the first tracing stylus 231 and the tip 241a of the second tracing stylus 241 pivotally move in the B direction about the rotation axis N2 of the shaft 215. However, the lens LE is pinched by the lens chuck shaft 110 and moves in parallel in the X direction. Therefore, depending on the turning angle α of the first probe 231 (in other words, the angle formed by the central axis K1 and the line segment connecting the tip 231a of the probe 231 and the rotation center axis N2), the first probe 231 The position coordinate of the tip 231a in the Y direction changes, and the tip 231a of the first tracing stylus 231 does not coincide with the measurement start point Pa at which the measurement of the shape of the front surface of the lens LE is started (that is, a predetermined movement is performed). The diameter may not be rn). Similarly, depending on the turning angle β of the second tracing stylus 241 (in other words, the angle formed between the central axis K1 and the line segment connecting the tip 241a of the tracing stylus 241 and the rotation center axis N2), The position coordinate of the tip 241a of the 241 in the Y direction changes, and the tip 241a of the second tracing stylus 241 does not match the measurement start point Pb at which the measurement of the shape of the rear surface of the lens LE is started (that is, a predetermined point). It may not be the radial length rn).

FIG. 6 is a diagram for explaining the deviation between the tips of the first and second measuring elements 231 and 241 and the measurement starting points Pa and Pb of the lens LE. FIG. 6A is an example when the turning angle α of the first tracing stylus 231 is larger than the turning angle β of the second tracing stylus 241 (that is, turning angle α>β). FIG. 6B shows a case where the turning angle α of the first probe 231 and the turning angle β of the second probe 241 are the same (that is, the turning angle α=β). FIG. 6C is an example of a case where the turning angle α of the first tracing stylus 231 is smaller than the turning angle β of the second tracing stylus 241 (that is, the turning angle α<β).

For example, as shown in FIG. 6A, when the swivel angle of each probe is α>β, the tip 231a of the first probe 231 and the tip 241a of the second probe 241 move in the Y direction. The position coordinates are different. More specifically, the position coordinate in the Y direction of the tip 241b of the second probe 241 is higher than the position coordinate in the Y direction of the tip 231a of the first probe 231. Therefore, for example, even if the lens LE is moved so that the tip 231a of the first tracing stylus 231 contacts the measurement starting point Pa of the lens LE, the tip 241a of the second tracing stylus 241 still has the measurement starting point Pb of the lens LE. It is touched at a point slightly deviated from. That is, the contact position of the tip 231a of the first probe 231 has a predetermined radial length rn, but the contact position of the tip 241a of the second probe 241 does not have the predetermined radial length rn.

Similarly, for example, as shown in FIG. 6C, when the swivel angle of each probe is α<β, the first coordinate is more than the position coordinate in the Y direction of the tip 241a of the second probe 241. The position coordinate of the tip 231b of the tracing stylus 231 in the Y direction becomes high. Therefore, for example, even if the lens LE is moved so that the tip 241a of the second tracing stylus 241 comes into contact with the measurement starting point Pb of the lens LE, the tip 231a of the first tracing stylus 231 still has the measurement starting point Pa of the lens LE. It is touched at a point slightly deviated from. That is, the contact position of the tip 241a of the second probe 241 has a predetermined radial length rn, but the contact position of the tip 231a of the first probe 231 does not have the predetermined radial length rn.

However, for example, as shown in FIG. 6B, when the turning angle of each probe is α=β, the position coordinate in the Y direction of the tip 231a of the first probe 231 and the second probe 241. Is the same as the position coordinate of the tip 241b in the Y direction. Therefore, for example, when the tip 231a of the first probe 231 is brought into contact with the measurement start point Pa of the lens LE, the tip 241a of the second probe 241 is brought into contact with the measurement start point Pb of the lens LE. That is, the contact position of the tip 231a of the first probe 231 and the contact position of the tip 241a of the second probe 241 both have a predetermined radial length rn. In such a state, the tip of each probe is prevented from being displaced from the measurement start point of the lens LE, and the probe and the lens LE are accurately aligned.

Therefore, when the tip 231a of the first tracing stylus 231 is brought into contact with the front surface of the lens LE and the tip 241a of the second tracing stylus 241 is brought into contact with the rear surface of the lens LE, the control unit 50 causes the tip of the first tracing stylus 231. The relative positions of the respective measuring elements and the lens LE are adjusted so that the height 231a and the tip 241a of the second measuring element 241 have the same height in the radial length rn direction of the lens LE.

For example, the control unit 50 causes the swivel angle α of the first tracing stylus 231 and the swiveling angle β of the second tracing stylus 241 to be the same angle, and starts the measurement of the first tracing stylus 231 and the second tracing stylus 241. The motors 124 and 132 are driven so as to come into contact with the points, and the movement positions of the carriage 111 in the X and Z directions are adjusted. The control unit 50 obtains the turning angles α and β from the detection results of the first detector 239 and the second detector 246, and based on this, calculates the position coordinate in the X direction of each probe (the position in the Z direction). Coordinates are known by design). The position coordinates of the first probe 231 and the second probe 241 with respect to the turning angle may be stored in the memory 30 by creating a correspondence table in advance from experiments, simulations, and the like.

For example, the control unit 50 causes the position coordinates in the XYZ directions of the measurement start point Pa based on the center of the lens LE acquired from the target lens shape data to match the position coordinates in the XYZ directions of the tip 231a of the first probe 231. As described above, the relative movement of the lens LE is controlled in consideration of the movement position of the first tracing stylus 231 due to the change of the turning angle α. At the same time, for example, the control unit 50 causes the second coordinate change of the turning angle β so that the position coordinates of the measurement start point Pb in the XYZ directions coincide with the position coordinates of the tip 241 a of the second probe 241 in the XYZ directions. The relative movement of the lens LE is controlled in consideration of the movement position of the tracing stylus 241. As a result, the tips of the first and second measuring elements 231 and 241 have the same height in the radial length rn direction of the lens LE, and the measurement starting points Pa and Pb of the lens LE are in contact with each other.

In addition, in this embodiment, since the movement locus M by the turning movement of the tip 231a of the first tracing stylus 231 and the tip 241a of the second tracing stylus 241 is configured to be substantially linear, It can be considered that there is almost no deviation between the tip of the probe and the measurement start point. For example, in this case, the edge thickness of the lens LE may be measured, and the relative positions of the tips of the first and second measuring elements 231 and 241 and the lens LE may be adjusted based on the edge thickness. ..

FIG. 7 is a diagram for explaining the adjustment of the relative positions of the first and second measuring elements 231 and 241 and the lens LE using the edge thickness of the lens LE. FIG. 7A is an example of a state in which the tip 231a of the first tracing stylus 231 and the tip 241a of the second tracing stylus 241 are in contact with the measurement start point of the lens LE. In FIG. 7B, the lens LE is moved in the X direction from the state of FIG. 7A, and the center position C between the tip 231a of the first probe 231 and the tip 241a of the second probe 241 is shifted. , Is an example of a state in which the relative position is adjusted.

For example, the control unit 50 acquires the edge thickness T at the measurement start point of the lens LE based on the position coordinates of the tip 231a of the first probe 231 and the position coordinates of the tip 241a of the second probe 241. To do. For example, the control unit 50 may obtain the difference between the position coordinates of the tip 231a of the first probe 231 and the position coordinates of the tip 241a of the second probe 241. In this embodiment, the tip of the first probe 231 and the tip of the second probe 241 are arranged at the same position in the Z direction, so the coordinates in the Z direction can be considered to be the same. In addition, in the present embodiment, since the tip of the first probe 231 and the tip of the second probe 241 move in a substantially straight line in the B direction, the coordinates in the Y direction can be considered to be substantially the same. Therefore, the control unit 50 obtains the edge thickness T of the lens LE at the measurement start point by obtaining the difference between the X-direction coordinates at the measurement start point. Further, the control unit 50 obtains the center position C of the edge thickness based on the edge thickness T at the measurement start point of the lens LE. For example, the control unit 50 obtains the center position C of the edge thickness by obtaining the coordinates of the midpoint in the X direction on the first and second measuring elements 231 and 241.

The control unit 50 uses the center position C of the edge thickness at the measurement start point of the lens LE to adjust the relative position of the lens LE with respect to the tips of the first probe 231 and the second probe 241. For example, the control unit 50 drives the motor 124 to move the carriage 111 in the X direction from the state shown in FIG. 7A, and as shown in the state shown in FIG. 7B, the edge thickness of the lens LE. The central position C of is matched with the central axis K1. That is, the position coordinates in the X direction of the central position C of the edge thickness of the lens LE and the central axis K1 are matched. Even by performing such control, the tip 231a of the first tracing stylus 231 and the tip 241a of the second tracing stylus 241 contact the measurement start point of the lens LE at the same turning angles α and β, and the movement of the lens LE. The height is the same in the radial direction rn direction.

<Measurement of lens surface shape>
When the alignment of the first measuring element 231 and the second measuring element 241 and the lens LE is completed, the shape of the front surface of the lens LE and the lens based on the position coordinates of the tips of the first measuring element 231 and the second measuring element 241 The shape on the rear surface of the LE and the LE are simultaneously measured.

First, the control unit 50 acquires the position coordinates of the measurement start point Pa on the front surface of the lens LE, and also acquires the position coordinates of the measurement start point Pb on the rear surface of the lens LE. For example, the position coordinate of the measurement start point Pa is obtained by the rotation angle of the first probe 231 in the B direction detected by the first detector 239 and the rotation amount of the motor 124 detected by the encoder 125. be able to. Further, for example, the position coordinates of the measurement start point Pb are determined by the turning angle of the second tracing stylus 241 in the B direction detected by the second detector 246 and the rotation amount of the motor 124 detected by the encoder 125. Can be obtained.

Next, the control unit 50 drives the motor 114 to rotate the lens LE held by the lens chuck shaft 110 at a predetermined radius vector angle θn (0.36 degrees in this embodiment). Further, for example, the control unit 50 drives the motor 132 to move the lens LE sandwiched by the lens chuck shafts 110 in the Z direction. For example, as a result, the tip 231a of the first probe 231 and the tip 241a of the second probe 241 follow the measurement position of the lens LE having the radius vector angle of 0.36 degrees. The control unit 50 acquires the position coordinates of the measurement position on the front surface of the lens LE at the radius vector angle of 0.36 degrees based on the detection results of the first detector 239 and the encoder 125. Further, the control unit 50 acquires the position coordinates of the measurement position at the radius vector angle of 0.36 degrees on the rear surface of the lens LE based on the detection results of the second detector 246 and the encoder 125.

At this time, since the thickness of the lens LE changes depending on the radial angle θn, the swivel angle α of the tip 231a of the first probe 231 and the swivel angle β of the tip 241a of the second probe 241 are the same. It may not be. Therefore, the control unit 50 moves the lens LE in the X direction based on the center position C of the edge thickness at the measurement position for each radial angle θn of the lens LE, and even if the lens LE is rotated, the turning angle α and the turning angle are set. The angle β may always be maintained at the same angle. Such control does not necessarily have to be executed, but since the tip of each of the measuring elements comes to coincide with the measurement position regardless of the change in the thickness of the lens LE, a more accurate position at each measurement position is obtained. You can get the coordinates.

For example, the control unit 50 simultaneously acquires the position coordinates of the tip 231a of the first probe 231 and the position coordinates of the tip 241a of the second probe 241 at all the radial angles θn of the lens LE. As a result, the shapes of the front surface and the rear surface of the lens LE, which are based on the center of the lens LE (the rotation axis S1 of the lens chuck shaft 110), are simultaneously acquired.

As described above, for example, in the eyeglass lens shape measuring apparatus according to the present embodiment, the first moving unit that brings the first measuring element into contact with the front surface of the eyeglass lens and the second moving element that brings the second measuring element into contact with the rear surface of the eyeglass lens. A second measuring means movable independently of the first moving means; a control means for controlling the first moving means and the second moving means; and a first measuring element brought into contact with the front surface of the spectacle lens by the control means, 1 Shape information of the front surface of the spectacle lens is acquired based on the position information of the measuring element, the second measuring element is brought into contact with the rear surface of the spectacle lens, and shape information of the rear surface of the spectacle lens is calculated based on the position information of the second measuring element. And shape information acquisition means for acquiring. In the conventional device, the first probe and the second probe are brought into contact with the spectacle lens by linear movement. Therefore, there are problems that the configuration becomes complicated, the apparatus becomes large, and the space inside the apparatus (for example, a processing chamber) cannot be effectively utilized. However, in this embodiment, the first probe and the second probe are brought into contact with the spectacle lens by the rotational movement. This simplifies the configuration and saves space in the device. Further, the cost can be reduced as compared with the conventional device.

Further, for example, in the spectacle lens shape measuring apparatus according to the present embodiment, the shape information acquisition unit acquires the position information of the first probe based on at least the turning angle of the first probe, and the position of the second probe. The information is acquired based on at least the turning angle of the second probe. For example, in the present embodiment, it is possible to obtain the approximate position information of the tracing stylus without considering the turning angle of each tracing stylus. However, when each of the tracing stylus moves, the tracing stylus shifts in a predetermined direction (Y direction in this embodiment). Therefore, it is possible to obtain more accurate position information in consideration of the swiveling angle of the tracing stylus. The shape information of the spectacle lens can be acquired accurately.

Further, for example, in the eyeglass lens shape measuring apparatus according to the present embodiment, the first rotary shaft on which the first probe moves and the second rotary shaft on which the second probe rotates are coaxially arranged. .. This saves space in the device, as compared with a configuration in which the first rotary shaft of the first probe and the second rotary shaft of the second probe are arranged on different axes. Moreover, the space in the processing chamber can be effectively utilized.

Further, for example, in the eyeglass lens shape measuring apparatus according to the present embodiment, the first tracing stylus is attached to the first mounting member so as to be rotatable about the first rotation shaft, and the second tracing stylus is attached to the second rotation shaft. Is attached to the second mounting member so as to be rotatable about the center, and the first mounting member and the second mounting member are combined. As a result, part of the first moving means and the second moving means are shared, which can lead to space saving and cost reduction of the device.

Further, for example, in the spectacle lens shape measuring device according to the present embodiment, the shape information acquisition unit causes the control unit to bring the first measuring element into contact with the front surface of the spectacle lens and the second measuring element to contact with the rear surface of the spectacle lens. , The shape information of the front surface of the spectacle lens based on the position information of the first measuring element and the shape information of the rear surface of the spectacle lens based on the position information of the second measuring element are acquired at the same time. By providing such a configuration, it is possible to simultaneously acquire the shape information of the front surface and the rear surface of the spectacle lens even though the configuration is simple, and the measurement time can be shortened.

Further, for example, in the eyeglass lens shape measuring apparatus in the present embodiment, when the first probe is brought into contact with the front surface of the eyeglass lens and the second probe is brought into contact with the rear surface of the eyeglass lens, An adjusting means is provided for adjusting the relative positions of the first and second measuring elements and the spectacle lens so that the two measuring elements have the same height in the radial direction of the spectacle lens. In the present embodiment, since the first probe and the second probe are configured to pivotally move, each probe contacts the spectacle lens while being displaced from a predetermined position depending on the position of each probe and the spectacle lens. Sometimes. However, by adjusting the contact position of the tracing stylus with the spectacle lens so as to have the same height in the radial direction, the accurate shape of the lens surface of the spectacle lens can be acquired.

Further, for example, in the eyeglass lens shape measuring apparatus according to the present embodiment, the adjusting unit causes the first measuring element and the second measuring element to have the same height in the radial direction of the radial direction for each radial angle of the spectacle lens. Then, the relative positions of the first and second measuring elements and the spectacle lens are adjusted. As a result, when measuring the shape of the spectacle lens, the displacement of the contact position of the tracing stylus is always suppressed, so that a more accurate shape of the lens surface of the spectacle lens can be acquired.

Further, for example, the spectacle lens shape measuring apparatus according to the present embodiment includes a thickness information acquisition unit that acquires thickness information of the edge thickness of the spectacle lens, and the adjustment unit determines the first measurement element and the first measurement element based on the edge thickness. The relative positions of the first probe and the second probe and the spectacle lens are adjusted so that the two probes have the same height in the radial direction. By using the edge thickness information of the spectacle lens, the relative position between the probe and the spectacle lens can be easily adjusted, and the displacement of the position where the probe contacts the spectacle lens is suppressed, and You can get the exact shape.

<Transformation example>
In the present embodiment, the case where an encoder is used as a detector that detects the turning angle of the support shaft 236 (first probe 231) and the support shaft 243 (second probe 241) has been described as an example. Not limited to. In the present embodiment, the detector may be any one that can detect the turning angle of the support shaft, and as an example, a position sensor, a rotation angle sensor, or the like may be used. The position information of the first probe 231 and the second probe 241 may be acquired based on the detection results of these sensors.

In addition, in the present embodiment, the first probe 231 and the second probe 241 are pivotally moved to bring the first probe 231 and the second probe 241 into contact with the front surface and the rear surface of the lens LE, and form the respective shapes. However, the present invention is not limited to this. For example, by linearly moving the first probe 231 and the second probe 241, the first probe 231 and the second probe 241 are brought into contact with the front surface and the rear surface of the lens LE, and the respective shapes are simultaneously measured. May be In this case, since the drive mechanism for linearly moving the tracing stylus is more complicated than the drive mechanism for swiveling, the device may be large. However, since the displacement of the contact position due to the rotational movement of the tracing stylus with respect to the lens LE hardly occurs, it is not always necessary to consider the thickness of the lens LE when measuring the shape of the lens surface of the lens LE. ..

In addition, in the present embodiment, the first moving unit 230 has a driving unit including a motor 233 and a gear mechanism (gears 234 and 235), and the first measuring element 231 is swung to move the first measuring element 231 and The configuration in which the distance in the X direction with the second tracing stylus 241 is widened has been described as an example, but the configuration is not limited to this. For example, the configuration may be such that the distance between the first probe 231 and the second probe 241 in the X direction is increased by rotating the second probe 241. In other words, it is only necessary to rotate at least one of the first probe 231 and the second probe 241 so as to widen the distance between the first probe 231 and the second probe 241 in the X direction.

As an example, both the first probe 231 and the second probe 241 may be pivotally moved in different directions to widen the X-direction interval between the first probe 231 and the second probe 241. In this case, either the first moving unit 230 or the second moving unit 240 may have the driving unit. As an example, the bearing 232 of the first moving unit 230 may be provided with a gear mechanism for transmitting the rotation of the motor, and the motor may be fixedly arranged on the bearing 242 of the second moving unit 240. For example, when the spring of the first moving unit is weaker than the spring of the second moving unit, when the motor is rotated, the bearing 232 rotates in the Ba direction, and the support shaft 236, the arm 237, and the tracing stylus 231 move in a swiveling manner. However, the movement of the support shaft 236 is restricted at a predetermined position by a pin (not shown). When the motor further rotates in this state, the rotation of the motor is transmitted to the bearing 242, and the support shaft 243, the arm 244, and the tracing stylus 241 pivotally move.

Further, in this case, both the first moving unit 230 and the second moving unit 240 may have a driving unit. That is, the first moving unit 230 is provided with a motor and a gear mechanism for transmitting the rotation of the motor to the bearing 232, and the second moving unit 230 is provided for transmitting the motor and the rotation of the motor to the bearing 242. By providing the gear mechanism, both the first tracing stylus 231 and the second tracing stylus 241 can be pivotally moved. Of course, the first moving part 230 and the second moving part 240 may share a motor, and the first measuring element 231 and the second measuring element 241 may be separately rotated.

Note that, for example, if both the first tracing stylus 231 and the second tracing stylus 241 rotate and move, even when the shape information is obtained from the thick lens LE, only one of the tracing stylus turns. Due to the moving structure, the movable width in the X direction of each of the measuring elements (arms 237 and 244 supporting the measuring element) can be reduced. Therefore, the processing chamber can be used more widely. When both the first tracing stylus 231 and the second tracing stylus 241 are pivotally moved, the timing of moving the first tracing stylus 231 and the timing of moving the second tracing stylus 241 may be the same, It may be different.

In the present embodiment, after the measuring element is brought into contact with the measurement starting point of the lens LE, based on the edge thickness T of the lens LE, the first measuring element 231 and the second measuring element 241, the lens LE, However, the present invention is not limited to this. For example, in this embodiment, the relative position between the tracing stylus and the lens LE does not necessarily have to be adjusted. However, in this case, each of the tracing stylus contacts while being displaced from the measurement start point of the lens LE, and the position coordinate of the tracing stylus does not match the position coordinate of the measurement start point. Therefore, the measurement accuracy may be improved by performing processing such as correction calculation in consideration of the deviation between the position coordinate of the probe and the position coordinate of the measurement start point.

In addition, in the present embodiment, when the relative position of the first measuring element 231 and the second measuring element 241 and the lens LE is adjusted, the central position C of the edge thickness is obtained, and thus the first measuring element 231 is obtained. However, the present invention is not limited to this configuration, in which the turning angle α and the turning angle β of the second tracing stylus 241 are substantially the same. For example, an arbitrary position of the edge thickness (for example, a position where the distance from the front surface to the rear surface of the lens LE is 1:2) may be obtained, and the turning angle α of the first tracing stylus 231 and the second The turning angle β of the tracing stylus 241 may be an arbitrary angle (for example, the turning angle α:β=1:2). In this case as well, since each of the tracing stylus contacts while being displaced from the measurement start point of the lens LE, the measurement accuracy may be improved by processing such as correction calculation.

In addition, in the present embodiment, the relative distance between the first measuring element 231 and the second measuring element 241 and the lens LE is set so that the first measuring element 231 and the second measuring element 241 have the same height in the radial direction. Although the configuration has been described as an example in which the position is adjusted for each radial angle of the lens LE, the present invention is not limited to this. For example, an allowable range is provided for the height difference in the radial direction between the first probe 231 and the second probe 241, and when the allowable range is exceeded, the first probe 231 and the second probe 241 are separated. The relative position between the lens LE and the lens LE may be adjusted.

In the present embodiment, when adjusting the relative positions of the first measuring element 231 and the second measuring element 241 and the lens LE, the lens LE is moved with respect to the measuring element to make the first measuring element 231 and the second measuring element 231 move. The configuration in which the turning angle of the tracing stylus 241 is changed has been described as an example, but the configuration is not limited to this. When adjusting the relative positions of the first measuring element 231 and the second measuring element 241 and the lens LE, the measuring element is moved with respect to the lens LE to rotate the first measuring element 231 and the second measuring element 241. The configuration may be such that the angle is changed. For example, in this case, the lens shape measuring unit 200 may be arranged so as to be movable in the X direction. By moving the lens shape measuring unit 200, the tracing stylus can be moved with respect to the lens LE, and the swivel angle of the tracing stylus can be changed. Of course, it is also possible to change the swivel angle of the tracing stylus by moving both the lens shape measuring unit 200 and the lens chuck shaft 110.

The lens shape measuring unit 200 according to the present embodiment pivots the first probe 231 and the second probe 241 in the B direction to move the first probe 231 and the second probe 241 to the lens of the lens LE. Although it is configured to contact the chuck shaft 110 rearward, the invention is not limited to this. For example, the lens shape measuring unit 200 pivotally moves the first probe 231 and the second probe 241 in the B direction to move the first probe 231 and the second probe 241 with respect to the lens chuck shaft 110 of the lens LE. The configuration may be such that either the front side, the upper side, or the lower side is contacted. However, in the configuration of the present embodiment, it is preferable that the tracing stylus is brought into contact with either the front side or the rear side of the lens LE with respect to the lens chuck shaft 110.

As described above, when the first probe 231 and the second probe 241 are pivotally moved in the B direction, the contact position of the probe with the lens LE is displaced in the Y direction depending on the pivot angles α and β. The thickness of the lens LE changes largely in the radial direction of the lens LE, and changes little in the direction perpendicular to the radial direction of the lens LE. Therefore, when the tracing stylus is brought into contact with the lens chuck upward or downward with respect to the lens chuck shaft 110, the contact position shift of the tracing stylus and the radial direction of the lens LE are in the same direction, and a larger shift occurs. Will end up. If the tracing stylus is brought into contact with either the front side or the rear side of the lens chuck shaft 110 of the lens LE, the displacement of the contact position of the tracing stylus and the radial direction of the lens LE become different directions, and a large displacement occurs. It gets harder.

1 Eyeglass Lens Edge Processing Device 100 Lens Holding Unit 200 Lens Shape Measuring Unit 231 First Measuring Element 241 Second Measuring Element 300 First Lens Processing Unit 400 Second Lens Processing Unit

Claims (8)

A spectacle lens shape measuring device for measuring the shape of a lens surface of a spectacle lens,
First moving means having a first measuring element, and rotating the first measuring element in the edge thickness direction of the spectacle lens about a first rotation axis to contact the front surface of the spectacle lens;
A second tracing stylus different from the first tracing stylus is provided, and the second tracing stylus is pivotally moved around the second rotation axis in the edge thickness direction of the spectacle lens to contact the rear surface of the spectacle lens. Second moving means which is movable independently of the first moving means,
Control means for controlling the first moving means and the second moving means,
The control means brings the first measuring element into contact with the front surface of the spectacle lens, acquires shape information of the front surface of the spectacle lens based on position information of the first measuring element, and sets the second measuring element to the spectacles. Shape information acquisition means for contacting the rear surface of the lens and acquiring shape information of the rear surface of the spectacle lens based on the position information of the second probe.
An eyeglass lens shape measuring device, comprising:
The eyeglass lens shape measuring device according to claim 1,
The shape information acquisition unit acquires the position information of the first probe based on at least the turning angle of the first probe, and the position information of the second probe at least the rotation of the second probe. A spectacle lens shape measuring device characterized by being acquired based on an angle.
The eyeglass lens shape measuring device according to claim 1 or 2,
The spectacle lens shape measuring device, wherein the first rotating shaft around which the first tracing stylus moves and the second rotating shaft around which the second tracing stylus moves around are coaxially arranged.
The spectacle lens shape measuring device according to claim 1,
The first moving means includes a first mounting member, and the first tracing stylus is mounted so as to be pivotally movable with respect to the first mounting member about the first rotation axis.
The second moving unit includes a second mounting member, and the second tracing stylus is mounted so as to be rotatable about the second rotation shaft with respect to the second mounting member.
An eyeglass lens shape measuring device, wherein the first mounting member and the second mounting member are used in common.
The spectacle lens shape measuring device according to any one of claims 1 to 4,
The shape information acquisition unit causes the control unit to bring the first measuring element into contact with the front surface of the spectacle lens and the second measuring element to contact with the rear surface of the spectacle lens, and position information of the first measuring element. An eyeglass lens shape measuring apparatus that simultaneously acquires the shape information of the front surface of the eyeglass lens based on the above and the shape information of the rear surface of the eyeglass lens based on the position information of the second probe.
The eyeglass lens shape measuring device according to claim 5,
When the first probe is brought into contact with the front surface of the spectacle lens and the second probe is brought into contact with the rear surface of the spectacle lens, the first probe and the second probe are the spectacle lens. In order to have the same height in the radial length direction in, the first measuring element and the second measuring element, and an adjusting means for adjusting the relative position of the spectacle lens,
The shape information acquisition means adjusts the relative position by the adjustment means, and acquires the shape information of the front surface of the spectacle lens and the shape information of the rear surface of the spectacle lens at the same time. measuring device.
The eyeglass lens shape measuring device according to claim 6,
The adjusting means adjusts the relative position for each radial angle of the spectacle lens so that the first probe and the second probe have the same height in the radial direction.
The eyeglass lens shape measuring device, wherein the shape information acquisition means acquires the shape information of the front surface of the eyeglass lens and the shape information of the rear surface of the eyeglass lens for each radius vector angle of the eyeglass lens.
The eyeglass lens shape measuring device according to claim 6 or 7,
A thickness information acquisition unit that acquires thickness information of the edge of the spectacle lens based on the position information of the first probe and the position information of the second probe,
The adjusting means adjusts the relative position based on the thickness information of the edge so that the first probe and the second probe have the same height in the radial direction. Eyeglass lens shape measuring device.