JP2016104502A - Spectacle lens processing device and spectacle lens processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spectacle lens processing device and a spectacle lens processing method enabling specular processing of various finished states and an operator to perform desired specular processing.SOLUTION: The spectacle lens processing device includes lens rotation means for holding a spectacle lens on a lens chuck shaft to rotate it, and processing tool rotation means for rotating a processing tool fixed to a processing tool rotary shaft, and specularly processes the peripheral edge of the spectacle lens. The spectacle lens processing device further includes setting means for setting the transparency of a specular surface of the spectacle lens, and control means for controlling the lens rotation means and the processing tool rotation means to perform specular processing based on processing conditions set according to the transparency set by the setting means.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a spectacle lens processing apparatus and a spectacle lens processing method for mirror-processing a peripheral edge of a spectacle lens.

The peripheral edge of the spectacle lens held in the spectacle frame is roughly processed by a rough processing tool included in the spectacle lens processing apparatus and then finished by a finishing tool. Furthermore, a spectacle lens processing apparatus is known that mirror-finishes the finished edge surface (see, for example, Patent Document 1).
In the spectacle lens processing apparatus that performs such mirror surface processing, the mirror surface processing conditions are set in advance, and the mirror surface processing is performed so that the mirror surface has a specific quality (finished state).

JP-A-11-90805

By the way, it has been found that there are various problems depending on the finished state of the mirror-finished surface. For example, when a mirror finish with a highly transparent finish is performed, the spectacle lens looks better, but light is incident from the mirror finish to induce diffuse reflection, so that the spectacle wearer can use glasses well. There was a case that could not be. In addition, for example, when mirror processing is performed in a finished state with low transparency, irregular reflection may be suppressed, but the appearance may not be good.
Under such circumstances, depending on the processor, the purpose such as emphasizing the appearance or emphasizing the feeling of use of the glasses is different, and the desired mirror finish is different depending on the purpose for each processor. all right.
An object of the present disclosure is to provide a spectacle lens processing apparatus and a spectacle lens processing method that enable mirror processing in various finished states and can perform mirror processing desired by a processor.

  In order to solve the above problems, the present disclosure is characterized by having the following configuration.

(1) A spectacle lens processing apparatus according to a first aspect of the present disclosure includes a lens rotating unit that rotates while holding a spectacle lens on a lens chuck shaft, and a processing tool rotation that rotates a processing tool attached to the processing tool rotation shaft. A spectacle lens processing apparatus for specularly processing the peripheral edge of the spectacle lens, setting means for setting the specular transparency of the spectacle lens, and processing conditions according to the transparency set by the setting means And a control means for controlling the lens rotating means and the processing tool rotating means to perform mirror surface processing.
(2) A spectacle lens processing method according to a second aspect of the present disclosure includes a lens rotating unit that rotates while holding a spectacle lens on a lens chuck shaft, and a processing tool rotating unit that rotates a grindstone attached to the processing tool rotating shaft. And a spectacle lens processing method for specularly processing the peripheral edge of the spectacle lens, the setting step for setting the specular transparency of the spectacle lens, and the processing conditions according to the transparency set by the setting step And a control step of performing mirror surface processing by controlling the lens rotating means and the processing tool rotating means.

It is a schematic block diagram of the process mechanism of an eyeglass lens processing apparatus. It is a control block diagram regarding an eyeglass lens processing apparatus. It is a figure which shows an example of a layout data setting screen. It is a figure explaining mirror surface processing control.

  One exemplary embodiment of the present disclosure will be described with reference to the drawings. Hereinafter, FIG. 1 is a schematic configuration diagram of a processing mechanism of the spectacle lens processing apparatus.

  A carriage unit 100 is mounted on the base 170 of the eyeglass lens processing apparatus main body 1. The periphery of the lens LE to be processed sandwiched between the lens chuck shafts (lens rotating shafts) 102L and 102R of the carriage 101 is formed by a cylindrical grindstone group 162 that is coaxially attached to the processing tool spindle (processing tool rotating shaft) 161a. Each wheel is pressed and processed. The grindstone group 162 includes a rough grindstone 163 for plastic, a finishing grindstone 164 having a bevel forming groove and a flat machining surface, and a mirror grindstone 165 having a beveling groove and a flat machining surface. A processing tool spindle (a grinding wheel spindle in this embodiment) 161 a is rotated by a motor 160. These constitute a grindstone rotating unit.

  The mirror surface grindstone 165 is used to make the surface of the lens edge finished by the finishing grindstone 164 more glossy and transparent. For example, the finishing grindstone 164 has a particle size of No. 400 and the mirror grindstone 165 has a particle size of about 4000. In addition, as a rough processing tool and a finishing tool, it is not restricted to a grindstone, Another processing tool (for example, cutter etc.) may be used. Moreover, although the structure which uses a grindstone is mentioned as an example as a mirror surface processing tool of the edge surface of a lens, another processing tool (for example, cutter etc.) may be used.

  A lens chuck shaft 102L is rotatably held on the left arm 101L of the carriage 101, and a lens chuck shaft 102R is rotatably held coaxially on the right arm 101R. The lens chuck shaft 102R is moved to the lens chuck shaft 102L side by a motor 110 attached to the right arm 101R. The lens chuck shafts 102R and 102L are rotated synchronously by a motor 120 attached to the left arm 101L via a rotation transmission mechanism such as a gear. These constitute lens rotating means (lens rotating unit).

  The carriage 101 is mounted on a support base 140 that can move along shafts 103 and 104 extending in the X-axis direction, and is linearly moved in the X-axis direction (the axial direction of the lens chuck shaft) by the rotation of the motor 145. These constitute the X-axis direction moving means. Further, shafts 156 and 157 extending in the Y-axis direction (the direction in which the distance between the lens chuck shafts 102L and 102R and the grindstone spindle 161a is changed) are fixed to the support base 140. The carriage 101 is mounted on the support base 140 so as to be movable in the Y-axis direction along the shafts 156 and 157. A Y-axis moving motor 150 is fixed to the support base 140. The rotation of the motor 150 is transmitted to a ball screw 155 extending in the Y axis direction, and the carriage 101 is moved in the Y axis direction by the rotation of the ball screw 155. These constitute the Y-axis direction moving means (interaxial distance variation unit).

  In FIG. 1, lens edge position measurement units (lens edge position detection units) 200 </ b> F and 200 </ b> R are provided above the carriage 101. The lens edge position measuring unit 200F has a measuring element that comes into contact with the front surface of the lens LE, and the lens edge position measuring unit 200R has a measuring element that comes into contact with the rear surface of the lens LE. The lens for processing the lens periphery is obtained by moving the carriage 101 in the Y-axis direction based on the target lens data and rotating the lens LE in a state where the two measuring elements are in contact with the front surface and the rear surface of the lens LE, respectively. The edge positions of the front surface and the rear surface of the lens are measured simultaneously. As the configurations of the lens edge position measuring units 200F and 200R, those described in Japanese Patent Laid-Open No. 2003-145328 can be used.

  A chamfering mechanism (chamfering unit) 300 is disposed on the front side of the processing apparatus main body 1. Although details of the chamfering mechanism unit 300 are omitted, the chamfering mechanism unit 300 includes a processing tool rotating shaft that is rotated by a motor, and a finishing chamfering grindstone and a mirror chamfering grindstone for the front and rear surfaces of the lens are attached to the processing tool rotating shaft. It has been. The processing tool rotating shaft of the chamfering mechanism unit 300 is moved from the retracted position to a predetermined processing position during chamfering.

<Control unit>
FIG. 2 is a control block diagram relating to the eyeglass lens processing apparatus 1. A non-volatile memory (storage unit) 51, a carriage unit 100, lens edge position measuring units 200F and 200R, a chamfering mechanism unit 300, a display 5, and the like are connected to the control unit 50.

  For example, the control unit 50 includes a CPU (processor), a RAM, a ROM, and the like. The CPU of the control unit 50 controls the entire apparatus, such as driving units (for example, the motors 110, 120, 145, 150, and 160) of each unit and each unit. The RAM temporarily stores various information. Various programs for controlling the operation of the entire apparatus, initial values, and the like are stored in the ROM of the control unit 50. The control unit 50 may be configured by a plurality of control units (that is, a plurality of processors). The non-volatile memory (storage means) 51 is a non-transitory storage medium that can retain stored contents even when power supply is interrupted. For example, a hard disk drive, a flash ROM, a USB memory or the like that is detachably attached to the lens peripheral edge processing apparatus 1 can be used as the nonvolatile memory (memory) 51.

  For example, in the present embodiment, the display 5 is a touch panel display. In addition, when the display 5 is a touch panel, the display 5 functions as an operation unit (operation unit). In this case, the control unit 50 receives an input signal through a touch panel function of the display 5 and controls display of graphics and information on the display 5. Of course, the spectacle lens processing apparatus 1 may be provided with an operation unit. In this case, for example, at least one of a mouse, a joystick, a keyboard, a touch panel, and the like may be used as the operation unit. In the present embodiment, a configuration in which the display 5 functions as an operation unit will be described as an example.

  In the present embodiment, the spectacle lens processing apparatus 1 is connected to the spectacle frame shape measuring apparatus 2 (see, for example, JP 2012-185490 A). The lens peripheral edge processing apparatus 1 receives various data acquired by the spectacle frame shape measuring apparatus 2 (details will be described later). Of course, the spectacle lens processing apparatus 1 and the spectacle frame shape measuring apparatus 2 may be integrally configured. In this case, for example, the measurement mechanism of the spectacle frame shape measuring apparatus 2 is provided in the spectacle lens apparatus 1.

  For example, in the present embodiment, the memory 51 stores the conditions of the lens rotation speed and the grindstone rotation speed in each processing stage of roughing, finishing, and mirror finishing.

  Further, for example, in this embodiment, in order to perform mirror processing of various qualities (finished states), a mirror processing mode is provided as a function for setting the mirror surface transparency of the spectacle lens. For example, in the present embodiment, the first specular processing mode in which the specular surface of the spectacle lens is mirror-finished so as to have the first transparency, and the specular surface of the spectacle lens has the second transparency different from the first transparency. The second mirror surface processing mode for mirror processing can be switched and used. For example, in each mirror processing mode, processing conditions are set so that the finished state after the mirror processing is the transparency set for each mirror processing mode.

  For example, in the present embodiment, mirror processing with high transparency can be performed in the first mirror processing mode. That is, when the first mirror surface processing mode is set and the mirror surface processing is performed, the finished state of the mirror surface after the mirror processing is in a transparent state. Also, for example, in the second mirror processing mode, mirror processing with low transparency can be performed. That is, when the second mirror surface processing mode is set and the mirror surface processing is performed, the finished state of the mirror surface after the mirror processing is in a cloudy state.

  For example, in the memory 51, as the first mirror surface processing mode, at least one of a lens rotation unit (lens rotation speed) and a grindstone rotation unit (grindstone rotation speed) for performing mirror surface processing so as to have the first transparency. The rotation speed is stored as a machining condition. That is, at least one of the lens rotation speed and the grindstone rotation speed for performing the mirror surface processing so as to achieve the first transparency is stored in the memory 51 as the processing condition of the first mirror surface processing mode. Further, for example, in the memory 51, as the second mirror surface processing mode, at least lens rotation means (lens rotation speed) and grindstone rotation means (grindstone rotation speed) for performing mirror surface processing so as to have the second transparency. One rotation speed is stored as a machining condition. That is, at least one of the lens rotation speed and the grindstone rotation speed for performing the mirror surface processing so as to achieve the second transparency is stored in the memory 51 as the processing condition of the second mirror surface processing mode. In the present embodiment, the case where the rotation speeds of the lens rotating means and the grindstone rotating means are set and stored as processing conditions will be described as an example. Of course, as described above, at least one of the lens rotation speed and the grindstone rotation speed may be stored in association with each mirror processing mode as a processing condition.

  For example, when mirror processing with high transparency is performed as in the first mirror processing mode, the processing performance of the grindstone is increased. When the processing performance of the grindstone is high, cutting can be performed in a state where the performance of the grindstone is sufficiently exerted on the mirror-finished surface. Thereby, the mirror-finished surface is in a finished state with high transparency. For example, when performing mirror surface processing with low transparency as in the second mirror surface processing mode, the processing performance of the grindstone is decreased. When the processing performance of the grindstone is low, cutting cannot be performed in a state where the performance of the grindstone is sufficiently exerted on the mirror-finished surface. As a result, the mirror-finished surface becomes rough, and the mirror-finished surface is in a finished state with low transparency. For example, the processing performance of the grindstone indicates whether or not the lens can be processed with a sufficient amount (processing amount) while the grindstone surface of the grindstone rotates. For example, high processing performance indicates that a sufficient amount of a lens can be processed with a grindstone (for example, a processing amount provided for the grindstone is secured in one rotation of the grindstone). In addition, the low processing performance indicates that a sufficient amount of the lens cannot be processed with the grindstone (for example, the processing amount of the grindstone is not secured in one rotation of the grindstone).

  For example, in order to increase the processing performance of the grindstone, at least one of setting the rotation speed of the grindstone to be fast (high speed) and setting the rotation speed of the lens to be slow (low speed) is performed. By performing such setting, processing can be performed on a predetermined region of the lens with more grindstone surfaces, and thus processing performance is improved. Further, for example, in order to lower the processing performance, at least one of setting the rotation speed of the grindstone slower and setting the rotation speed of the lens faster is performed. By performing such a setting, it becomes impossible to process a predetermined region of the lens with a plurality of grindstone surfaces, and the processing performance is lowered.

  In the present embodiment, the first mirror surface processing mode is set to be higher in transparency than the second mirror surface processing mode. For this reason, the rotational speed of the grindstone in the first mirror surface processing mode is set to be higher than the rotational speed of the grindstone in the second mirror surface processing mode. Further, the rotation speed of the lens in the first mirror surface processing mode is set to be lower than the rotation speed of the lens in the second mirror surface processing mode. Thus, by setting the rotational speed of the grindstone and the rotational speed of the lens, the transparency of the mirror processing in the first mirror processing mode becomes higher than the transparency of the mirror processing in the second mirror processing mode. In the present embodiment, the first mirror surface processing mode is an example in which the rotation speed of the grindstone is set to a high speed and the rotation speed of the lens is set to a low speed with respect to the processing conditions of the second mirror surface processing mode. However, the present invention is not limited to this. For example, the first mirror surface processing mode may be a configuration in which at least one of the rotational speed of the grindstone and the rotational speed of the lens is set with respect to the processing conditions of the second mirror surface processing mode. In this case, one of the rotational speed of the lens and the rotational speed of the grindstone may be adjusted so that the moving speed at the contact point between the lens and the grindstone becomes a predetermined speed. It should be noted that the setting of the processing conditions corresponding to the transparency is obtained in advance by simulation, calculation, or the like that checks the transparency while changing the processing conditions.

<Control action>
The operation of the apparatus having the above configuration will be described. In the following description, a case where flat finishing and mirror finishing are performed will be described as an example. For example, examples of the finishing process include a flat finishing process (flat process), a beveling process, and a chamfering process. In the present embodiment, a case where flat processing is performed as finishing processing will be described as an example. In this embodiment, mirror processing is performed after flat processing is performed on the lens.

<Acquisition of target lens data>
For example, the target lens shape data is acquired by the spectacle frame shape measuring apparatus 2. For example, by measuring the spectacle frame by the spectacle frame shape measuring apparatus 2, the lens frame lens shape data (rn, ρn) (n = 1, 2, 3,..., N) is measured. By operating a data transmission switch (not shown) of the spectacle frame shape measuring apparatus 2, the target lens shape data is transmitted from the spectacle shape measuring apparatus 2 to the spectacle lens processing apparatus 1 and stored in the memory 51 of the spectacle lens processing apparatus 1.

  In the present embodiment, the target lens shape data is exemplified by the configuration acquired by the spectacle frame shape measuring apparatus 2, but is not limited thereto. For example, the operator may remove the demo lens attached to the spectacle frame and then read the contour of the demo lens with a contour reading device or the like to measure the target lens data. In this embodiment, the lens shape data is transmitted from the spectacle frame shape measuring device 2 by operating a data transmission switch (not shown) of the spectacle frame shape measuring device 2, but the present invention is not limited to this. For example, the lens data may be input by operating the display 5 of the eyeglass lens processing apparatus 1 by the operator.

<Layout data settings>
When the target lens shape data is acquired, the control unit 50 displays a layout data setting screen for setting layout data for the target lens shape data. FIG. 3 is a diagram illustrating an example of a layout data setting screen. For example, in this embodiment, rn, which is target lens data, is a radial length, and ρn indicates a radial angle. On the screen 500a of the display 5, a target lens shape FT based on the input target lens shape data is displayed. The layout data such as the distance between the pupils of the wearer (PD value), the distance between the frame centers of the spectacle frame F (FPD value), and the height of the optical center OC with respect to the geometric center FC of the target lens shape can be set. For example, the layout data is set by operating a predetermined touch key displayed on the screen 500b. For example, the touch keys 510, 511, 512, 513 and the like set the lens material, the frame type, and the processing conditions (such as beveling and flat finishing). For example, the lens material can be selected from a plastic lens and a polycarbonate lens. In addition, for example, it can be selected whether or not the peripheral edge of the lens is a mirror finish.

  In the present embodiment, the operator performs settings for performing mirror surface processing after performing flat processing on the lens. The operator operates the screen of the display 5 to set the flat machining mode as the machining mode. In addition, the operator operates the screen of the display 5 to set a mode for performing mirror finish. When the setting for performing mirror processing is performed, the control unit 50 displays a setting screen for setting the mirror processing mode as a function for setting the transparency of the specular surface of the spectacle lens. For example, in the present embodiment, the setting screen displays the first mirror surface processing mode and the second mirror surface processing mode in a switchable (selectable) manner. The operator operates the screen of the display 5 to select a desired mirror surface processing mode. When the mirror surface processing mode is selected by the operator, the control unit 50 switches the processing conditions for the mirror surface processing to the processing conditions corresponding to the selected mirror surface processing mode. In this way, the mirror processing mode for setting the mirror processing surface to the transparency desired by the operator is set.

  In the present embodiment, in the lens peripheral edge processing apparatus 1, the layout data is set by operating the display 5, but the present invention is not limited to this. For example, the layout data is acquired by setting the layout data with another device or PC (personal computer) and receiving the layout data set by the lens peripheral edge processing device 1 (control unit 50 in the present embodiment). It may be configured to.

<Lens shape measurement>
As described above, when data necessary for lens processing is acquired, the operator holds the lens LE between the lens chuck shafts 102R and 102L. When a processing start switch (not shown) displayed on the display 5 is selected by the operator, the control unit 50 starts processing the peripheral edge of the lens LE.
First, when the start switch is pressed, the control unit 50 operates the lens edge position measuring units 200F and 200R to measure the edge positions of the front and rear surfaces of the lens based on the target lens shape data. By measuring the edge position of the lens, it is confirmed whether or not the diameter of the raw lens LE is insufficient with respect to the target lens shape. When beveling is set, a bevel locus formed on the edge is calculated based on edge position data on the front and rear surfaces of the lens.

<Roughing>
When the lens shape measurement is completed, the control unit 50 starts roughing. Based on the target lens shape data and the layout data, the control unit 50 obtains processing control data (control data) for driving each member in order to roughly process the periphery of the lens LE. For example, the rough processing control data on the periphery of the lens LE includes a finishing allowance (for example, 1.0 mm) by the finishing grindstone 165 and a mirror finish for the mirror surface grindstone 165 (for example, 0.1 mm) for the final target lens shape. Calculated to leave. When the rough machining control data is acquired, the control unit 50 controls the driving of the X-axis movement motor 145 to position the lens LE on the rough grindstone 163. Thereafter, the control unit 50 controls driving of the Y-axis moving motor 150 while rotating the lens LE by the motor 120 based on the rough machining control data. The peripheral edge of the lens LE is roughly processed by a plurality of rotations of the lens LE. The rotational speed of the lens during rough processing is set at, for example, 8 seconds / 1 rotation. Further, the roughing grindstone 163 at the time of roughing is set to the fastest speed at which the motor 160 can be stably rotated so as to fully utilize the processing performance of the roughing grindstone 163. In the eyeglass lens processing apparatus 1 according to the present embodiment, for example, the coarse grindstone 163 is rotated at a rotation speed of 6000 rpm. In the present embodiment, the rough machining control data is configured to be calculated by the eyeglass lens processing apparatus 1, but is not limited thereto. For example, the spectacle lens processing device 1 may acquire rough processing control data by receiving rough processing control data calculated by another device.

<Finishing (flat machining)>
When the roughing is completed, the process proceeds to finishing (in this embodiment, flat processing). Based on the target lens shape data and layout data, the control unit 50 obtains flat processing control data for flat processing the lens periphery. For example, the flat processing control data is calculated so as to leave a predetermined finishing allowance (0.1 mm) for mirror processing. The control unit 50 controls driving of the X-axis moving motor 145 to position the lens LE on the flat surface of the finishing grindstone 164. Thereafter, the Y-axis movement motor 150 is controlled based on the flat machining control data, and the flat grinding is performed by the finishing grindstone 164. Even during flat processing, the rotation speed of the lens is set at 8 seconds / 1 rotation. Further, the rotational speed of the finishing grindstone 164 is set to 6000 rpm, which is the fastest speed at which the motor 160 can stably rotate, for example, as in rough machining. The conditions of the rotational speed of the lens LE and the rotational speed of each grindstone during rough processing and flat processing are stored in the memory 51 in advance. In the present embodiment, the flat processing control data is calculated by the lens peripheral edge processing apparatus 1, but is not limited thereto. For example, the lens peripheral processing device 1 may acquire the flat processing control data by receiving the flat processing control data calculated by another device.

<Mirror finish>
When finishing is completed, the process proceeds to mirror finishing. Based on the target lens shape data and layout data, the control unit 50 obtains mirror surface finishing control data for mirror finishing the lens periphery. FIG. 4 is a diagram for explaining the mirror surface processing control. For example, the mirror surface processing control data is obtained by rotating the lens LE for each minute rotation angle θi (i = 1, 2, 3,..., N) based on the final shape target lens shape data and the radius R of the mirror surface grindstone 165. By obtaining the inter-axis distance YDi between the center LO of the lens chuck shafts 102R and 102L and the center DC of the grindstone spindle (grindstone rotation axis) 161a when the target lens is in contact with the machining surface of the mirror surface grindstone 165 at each rotation angle θi. It is calculated and obtained as (YDi, θi) (i = 1, 2, 3,..., N) (see FIG. 4). Here, flat finishing is described as an example of finishing, but mirror surface control data when beveling is set as finishing is further illustrated based on the bevel trajectory data. X-axis direction component movement data XDi (i = 1, 2, 3,..., N) is added to obtain (YDi, XDi, θi) (i = 1, 2, 3,..., N).
The control unit 50 controls the driving of the X-axis moving motor 145 so that the lens LE is positioned on the flat surface of the mirror surface grindstone 165. Thereafter, based on the mirror surface processing data calculated to grind the finishing allowance (0.1 mm) of the mirror surface processing, the Y-axis moving motor 150 is controlled, and the periphery of the lens LE is mirror-finished by the mirror surface grindstone 165.

  Here, in this embodiment, the mirror surface processing is performed by stepwise changing the rotation speed of the lens (rotation speed of the lens rotation means) and the rotation speed of the mirror surface grindstone 165 (rotation speed of the grindstone rotation means). For example, in the present embodiment, mirror finishing is performed by changing the rotation speed in the second stage. Of course, the stepwise rotational speed change is not limited to the second stage rotational speed change. At least in the final stage among the stages in which the rotational speed is changed, the mirror surface processing may be performed according to the processing conditions set for each mirror processing mode.

  In the present embodiment, for example, in the first stage, each motor 120 and the grindstone rotation speed are set mainly to efficiently grind most of the mirror surface machining allowance (0.1 mm). The driving of 160 is controlled. The processing conditions in the first stage are stored in the memory 51. That is, when performing the first stage mirror surface processing, the control unit 50 acquires the processing conditions according to the first stage mirror processing from the memory 51, and based on the acquired processing conditions, the motors 120 and 160 Control the drive. For example, in the second stage, the driving of the motors 120 and 160 is controlled based on the processing conditions (lens rotation speed and grindstone rotation speed) set for each mirror processing mode. That is, the control unit 50 acquires processing conditions corresponding to the mirror processing mode from the memory 51, and controls driving of the motors 120 and 160 based on the acquired processing conditions.

  For example, the processing condition in the first stage is a mirror surface grindstone (for example, a grain size of 4000) 165 and is set so that the processing efficiency of the lens LE is not increased and the processing efficiency is increased. . For example, the grindstone rotation speed is 2000 rpm, and the lens rotation speed is 15 seconds / 1 rotation. By rotating the lens LE under the first stage processing conditions, most of the mirror surface processing allowance (0.1 mm) is ground. Of course, the grindstone rotation speed and the lens rotation speed are not limited thereto. Various rotational speeds can be set.

  Further, in the second stage, the mirror surface processing is performed by changing the lens rotation speed and the grindstone rotation speed to the processing conditions corresponding to the set mirror surface processing mode. For example, when the first mirror surface processing mode is set, the processing conditions are a lens rotation speed of 15 seconds / rotation and a grindstone rotation speed of 3000 rpm. Further, for example, when the second mirror processing mode is set, the lens rotation speed is set to 5 seconds / 1 rotation, and the grindstone rotation speed is set to 300 prm. For example, when the lens rotation speed and the grindstone rotation speed are changed from the first stage to the second stage, if the rapid change is difficult, the speed is gradually increased by 1/2 or 1/4 rotation of the lens. It may be provided as a transition area that can be changed. In addition, the grindstone rotation speed and the lens rotation speed in the first mirror surface processing mode and the second mirror surface processing mode are not limited to this. Various rotational speeds can be set.

  As described above, for example, by performing mirror surface processing based on the processing conditions according to the set transparency, it is possible to perform mirror surface processing with different transparency, and provide mirror processing of various qualities (finished state). it can. Thereby, the processor can change the finish of the mirror surface in the spectacle lens according to the purpose, and can perform the desired mirror surface processing. Further, for example, by providing a mirror processing mode for each transparency and setting the transparency by switching the mirror processing mode, the operator can easily set the transparency without a complicated operation. it can. Further, for example, by performing mirror surface processing by controlling at least one of the lens rotating unit and the grindstone rotating unit, complicated control and configuration are not required, and the transparency in the mirror surface processing can be easily adjusted.

<Transformation example>
In the present embodiment, when controlling the mirror surface processing, the lens shape data, the radius R of the mirror surface grindstone 165, so that the moving speed of the contact point Pi between the mirror surface grindstone 165 and the lens LE is substantially constant. Based on the lens rotation speed and the grindstone rotation speed, the lens rotation speed and the grindstone rotation speed for each rotation angle θi may be calculated, and the driving of the motors 120 and 160 may be controlled. Accordingly, a change in the moving speed of the contact point Pi caused by friction between the mirror surface grindstone 165 and the lens LE can be suppressed, so that the mirror surface processing can be performed uniformly under the set processing conditions. Thereby, the quality of the mirror surface can be further improved. Such control is particularly useful when the target lens shape is not circular.

  For example, rotation speed data for each rotation angle θi in which the moving speed of the contact point Pi (see FIG. 4) is substantially constant can be obtained as follows. First, based on the lens rotation speed, an average speed is obtained when the rotation speed for each lens rotation angle θi (i = 1, 2, 3,..., N) is constant. Further, the circumference of the entire circumference of the lens is obtained based on the target lens shape data that is the final shape of the lens LE, and the average moving distance of the rotation angle θi is obtained based on the total number of divisions of the rotation angle θi. With respect to the average moving distance, the rate of change of the moving distance between the adjacent contact points Pi is obtained for each rotation angle θi. The position of the contact point Pi for each rotation angle θi can be obtained by a well-known method based on the target lens shape data and the radius R of the mirror surface grindstone. Then, the rotation speed at each rotation angle θi is determined by changing the average speed at each rotation angle θi according to the obtained change rate. However, the rotational speed is gradually changed where the rotational speed cannot be rapidly changed at each rotational angle θi. In this way, rotational speed data can be obtained such that the moving speed of the contact point Pi between the mirror-finished grindstone 165 and the lens LE is substantially constant.

  In the present embodiment, the case where the machining conditions are changed in stages and the mirror surface machining is performed is described as an example, but the present invention is not limited to this. Processing may be performed from the initial stage of mirror processing under the processing conditions set for each mirror processing mode.

  In the present embodiment, the configuration in which the first mirror surface processing mode and the second mirror surface processing mode are switched as the mirror surface processing mode has been described as an example, but the present invention is not limited to this. The configuration of the mirror processing mode may be a configuration in which at least two mirror processing modes having different transparency are provided. For example, the third mirror processing mode for mirror processing so that the specular surface of the spectacle lens has a first transparency and a third transparency different from the second transparency is a first mirror processing mode and a second mirror processing mode. In addition to these, a configuration may be further provided. And by switching these mirror surface processing modes, mirror surface processing with different transparency is performed. In this case, it is possible to perform mirror processing with three different transparency levels by switching between the first mirror processing mode, the second mirror processing mode, and the third mirror processing mode. By adopting such a configuration, it becomes possible to perform more mirror processing with different transparency, and it is possible to provide mirror surfaces with different finished states.

  In addition, in this embodiment, although the case where mirror surface processing was performed using a mirror surface grindstone was described as an example, the present invention is not limited to this. It is good also as a structure which mirror-finishes by the grindstone different from the grindstone for mirror-finishing. For example, it is good also as a structure which mirror-finishes with a finishing grindstone.

  In the present embodiment, the configuration in which the transparency of mirror surface processing is adjusted by controlling at least one of the lens rotating unit and the grindstone rotating unit has been described as an example, but the present invention is not limited to this. For example, in order to change the transparency of mirror surface processing, a grindstone corresponding to the transparency may be provided to perform the mirror surface processing. For example, a mirror surface grindstone having a particle size of 4000 and a grindstone having a particle size of 6000 may be provided, and may be switched to use when performing mirror surface processing.

  In the present embodiment, the configuration in which the operator operates the screen of the display 5 and selects the mode has been described as an example, but the present invention is not limited to this. The mode may be switched based on a predetermined condition. For example, a configuration in which the control unit 50 switches to an appropriate mirror surface processing mode based on spectacle information (for example, a lens type, a frame type, a set processing type, etc.) and sets the mirror processing transparency. It is good. For example, the control unit 50 may be configured to display guide information for guiding to an appropriate mode based on the spectacle information. In this case, the operator can check the guide information and select an appropriate mirror surface processing mode.

  In the present embodiment, the setting of the transparency by the mode switching unit has been described as an example of the means for setting the transparency of the mirror surface, but is not limited thereto. Any configuration may be used as long as the transparency is automatically set and the transparency is set by an operation by the operator. For example, as a configuration in which the transparency is set by an operation by the operator, a configuration in which the transparency of the mirror finishing is set by the operator directly inputting a parameter, and a cursor that can change the transparency parameter is operated by the operator The structure which sets the transparency of mirror surface processing by this, etc. are mentioned. For example, as a configuration in which the transparency is automatically set, the control unit 50 sets the transparency based on the spectacle information (for example, the type of lens, the type of frame, the set processing type, etc.). Examples include the configuration. In this case, it is preferable that the eyeglass information and the transparency are associated in advance.

  Note that the technique disclosed in the present embodiment may perform mirror surface processing on a chamfered surface after chamfering processing that processes the corners of the periphery of the lens.

  In addition, in this embodiment, although it was set as the structure which mirror-finishes so that it may become predetermined | prescribed transparency, it is not limited to this. For example, mirror processing may be performed so as to have a plurality of transparency levels (at least two transparency levels). In this case, for example, the first transparency of the specular surface of the spectacle lens is set, and an area to be mirror-finished with the set first transparency is set at the periphery of the lens. Moreover, the area | region which performs a mirror surface process with the 2nd transparency different from the set 1st transparency is set. Of course, when the first transparency is set, the remaining area may be set to automatically perform mirror finishing with the second transparency. Moreover, you may enable it to set with at least 2 or more transparency (For example, 3 transparency of 1st transparency, 2nd transparency, 3rd transparency, etc.). And when performing mirror surface processing, the structure which performs mirror surface processing for every set area | region and performs mirror surface processing of various transparency is mentioned.

DESCRIPTION OF SYMBOLS 5 Display 50 Control part 51 Memory 100 Carriage part 102L, 102R Lens chuck shaft 110 Motor 120 Motor 145 Motor 150 Motor 160 Motor 161a Processing tool spindle 165 Mirror surface grindstone 300 Chamfering mechanism part

Claims (5)

Lens rotating means for rotating the eyeglass lens while holding the lens chuck shaft;
A processing tool rotating means for rotating the processing tool attached to the processing tool rotating shaft;
A spectacle lens processing device that mirrors the periphery of the spectacle lens,
Setting means for setting the transparency of the specular surface of the spectacle lens;
Control means for performing mirror surface processing by controlling the lens rotating means and the processing tool rotating means based on the processing conditions according to the transparency set by the setting means,
An eyeglass lens processing apparatus comprising: In the eyeglass lens processing apparatus according to claim 1,
The setting means has a first mirror processing mode in which the specular surface of the spectacle lens has a first transparency, and a specular surface of the spectacle lens has a second transparency different from the first transparency. Mode switching means for switching between a second mirror surface processing mode for mirror processing,
The control means performs specular processing by controlling the lens rotating means and the processing tool rotating means on the basis of a processing condition according to a mirror surface processing mode switched by the mode switching means. Lens processing device. In the eyeglass lens processing apparatus according to claim 2,
In the first mirror surface processing mode, the rotational speed of at least one of the lens rotating means and the processing tool rotating means is set as a processing condition so as to be the first transparency,
In the second mirror surface processing mode, the rotational speed of at least one of the lens rotating means and the processing tool rotating means is set as a processing condition so as to be the second transparency,
The control means acquires processing conditions according to the mirror surface processing mode switched by the mode switching means from a storage means in which processing conditions for each mirror processing mode are stored, and based on the acquired processing conditions, the lens A spectacle lens processing apparatus that performs mirror surface processing by controlling a rotating means and the processing tool rotating means. In the eyeglass lens processing apparatus according to claim 3,
The mode switching means is configured so that the first mirror surface processing mode, the second mirror surface processing mode, and the specular surface of the spectacle lens have a first transparency and a third transparency different from the second transparency. A spectacle lens processing apparatus, wherein the specular lens processing mode is switched to a third mirror surface processing mode for mirror processing. A spectacle lens processing method comprising: a lens rotation unit that rotates while holding a spectacle lens on a lens chuck shaft; and a processing tool rotation unit that rotates a grindstone attached to the processing tool rotation shaft. Because
A setting step of setting the transparency of the specular surface of the spectacle lens;
A control step of performing mirror surface processing by controlling the lens rotating means and the processing tool rotating means based on the processing conditions according to the transparency set by the setting step;
An eyeglass lens processing method comprising: