JP2021076659A - Spectacle frame shape measurement device and spectacle frame shape measurement program - Google Patents

Abstract

To provide a spectacle frame shape measurement device and a spectacle frame shape measurement program capable of acquiring appropriate cross section information in a groove of a rim of a spectacle frame.SOLUTION: A spectacle frame shape measurement device that measures the shape of a spectacle frame, comprises: a projection optical system that radiates measured luminous flux from a light source toward a groove of a rim of the spectacle frame, to form a first cut surface in the groove of the rim; a light receiving optical system that receives reflected luminous flux of the measured luminous flux reflected by the first cut surface of the groove of the rim with a detector; acquisition means that acquires first cross sectional information on the first cut surface of the groove of the rim based on the detection result of the detector; and correction means that corrects the first cross section information to second cross section information so that the first cut surface of the groove of the rim becomes a second cut surface in a desired direction in the groove of the rim.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a spectacle frame shape measuring device for obtaining the shape of a spectacle frame.

The groove of the rim of the spectacle frame is irradiated with the measured luminous flux, the reflected luminous flux of the measured luminous flux reflected in the groove of the rim of the spectacle frame is received, and the cross-sectional information of the groove of the rim of the spectacle frame is acquired based on this reflected luminous flux. A spectacle frame shape measuring device is known (see, for example, Patent Document 1).

International Publication No. 2019/026416

For example, the cross-sectional information of the groove of the rim obtained by the spectacle frame shape measuring device is used to create the processing data required when processing the spectacle lens, and the spectacle lens processing device uses the processing data to create the spectacles. Process the periphery of the lens. By the way, when the cross-sectional information of the rim groove is obtained without complicating the control and configuration of the spectacle frame shape measuring device, the direction in which the rim groove is photocut is limited, so that a desired cut surface in the rim groove is obtained. It was difficult to properly obtain the cross-sectional information of.

In view of the above-mentioned prior art, it is a technical subject of the present disclosure to provide a spectacle frame shape measuring device and a spectacle frame shape measuring program capable of acquiring appropriate cross-sectional information in a groove of a rim of a spectacle frame.

In order to solve the above problems, the present invention is characterized by having the following configurations.

The spectacle frame shape measuring device according to the first aspect of the present disclosure is a spectacle frame shape measuring device that measures the shape of the spectacle frame, and irradiates a measurement light beam from a light source toward a groove of a rim of the spectacle frame, and the above-mentioned A light projecting optical system that forms a first cut surface in the groove of the rim, and a light receiving optical system that receives the reflected light beam of the measured light source reflected by the first cut surface of the groove of the rim with a detector. The acquisition means for acquiring the first cross-sectional information of the first cut surface of the groove of the rim based on the detection result of the detector, and the first cut surface of the groove of the rim are in the groove of the rim. It is characterized by comprising a correction means for correcting the first cross-section information to the second cross-section information so as to be a second cut surface in a desired direction.

The eyeglass frame shape measuring program according to the second aspect of the present disclosure is an eyeglass frame shape measuring program used in an eyeglass frame shape measuring device for measuring the shape of an eyeglass frame, and is executed by a processor of the eyeglass frame shape measuring device. As a result, the light projection step of irradiating the measurement light beam from the light source toward the groove of the rim of the spectacle frame to form the first cut surface in the groove of the rim, and the first cut surface of the groove of the rim. Based on the light receiving step of receiving the reflected light source of the measured light source reflected by the detector and the detection result of the detector, the first cross-sectional information on the first cut surface of the groove of the rim is acquired. The acquisition step and the correction step of correcting the first cross-sectional information to the second cross-sectional information so that the first cut surface of the groove of the rim becomes the second cut surface in the desired direction in the groove of the rim. , Is executed by the eyeglass frame shape measuring device.

It is an external view of the measuring device. It is a top view of the frame holding unit which held the spectacle frame. It is the schematic of the holding unit and the spectacle frame measurement optical system. It is a top perspective view of the measuring unit. It is a bottom perspective view of a measuring unit. It is a top perspective view of the Z direction moving unit and the Y direction moving unit. It is a schematic diagram of a rotating unit. It is a figure which shows the control system of a measuring apparatus. It is a figure explaining the irradiation position of the measurement light flux with respect to the groove of a rim. This is an example of an image captured from the normal direction in the groove of the rim. It is a figure which shows various parameters obtained from the 1st cross-sectional shape of the groove of a rim. It is a figure which shows the 1st cut surface in the normal direction with respect to the groove of a rim, and the 2nd cut surface in a radial direction. It is a figure which shows the 1st cross-sectional shape in the normal direction of the groove of a rim, and the 2nd cross-sectional shape in a radial direction.

<Overview>
The outline of the spectacle frame shape measuring device according to the embodiment of the present disclosure will be described. In the present embodiment, the vertical direction of the spectacle frame shape measuring device is the Z direction, the horizontal direction is the X direction, and the front-rear direction is the Y direction. In other words, in the spectacle frame held by the spectacle frame shape measuring device, the front-back direction of the rim when worn is the Z direction, the left-right direction of the rim when worn (the direction of the left end and the right end) is the X direction, and the rim when worn. The vertical direction (the direction of the upper end and the lower end) is the Y direction. The items classified by <> below can be used independently or in relation to each other.

<Throwing optical system>
The spectacle frame shape measuring device in the present embodiment includes a light projecting optical system (for example, a light projecting optical system 30a). The projection optical system has a light source (for example, a light source 31) and irradiates a measured luminous flux from the light source toward the groove of the rim of the spectacle frame. As a result, a first cut surface is formed in the groove of the rim of the spectacle frame so that the groove of the rim of the spectacle frame is photocut by the measured luminous flux.

The floodlight optical system may have at least one light source. For example, it may have one light source. Further, for example, it may have a plurality of light sources.

The projection optical system may have an optical member. For example, as the optical member, at least one of a lens, a mirror, an aperture, and the like may be used. Of course, for example, as the optical member, an optical member different from these optical members may be used. For example, by using a diaphragm as an optical member, the depth of focus of the measured luminous flux can be increased. As described above, when the projection optical system has an optical member, the measured luminous flux emitted from the light source may be emitted toward the groove of the rim of the spectacle frame via each optical member.

The projectile optical system may have a configuration in which the measured luminous flux emitted from the light source is emitted toward the groove of the rim of the spectacle frame. For example, the projection optical system may be configured to have at least a light source. Further, the projection optical system may have a configuration in which the measured luminous flux emitted from the light source is irradiated toward the groove of the rim of the spectacle frame via a member different from the optical member.

For example, the measured luminous flux emitted by the projection optical system toward the groove of the rim of the spectacle frame may be a measured luminous flux having a width (for example, a slit-shaped measured luminous flux). In this case, the projection optical system may irradiate the measured luminous flux from the light source toward the groove of the rim of the spectacle frame to form a light cut surface on the groove of the rim.

For example, when the projection optical system irradiates a measurement light flux having a width, a light source that emits a slit-shaped light beam may be used as the light source. For example, in this case, the light source may be a point light source. For example, by arranging a plurality of point light sources side by side, a measurement luminous flux having a width such that the thickness direction of the rim is longitudinal may be irradiated. Further, for example, the measured luminous flux having a width may be irradiated by scanning the spot-shaped luminous flux emitted from the point light source. Further, for example, the measurement light flux having a width may be irradiated by diffusing the spot-shaped measurement light beam emitted from the point light source with the optical member. Of course, various types of light sources different from the above-mentioned light sources may be used to irradiate the measured luminous flux having a width.

In the present embodiment, the first cut surface in which the luminous flux measured by the light projecting optical system lightly cuts the groove of the rim of the spectacle frame may be the first cut surface in which the groove of the rim is lightly cut from an arbitrary direction. .. For example, the first cut surface may be a cut surface obtained by lightly cutting the groove of the rim from a direction different from the radial direction. In this case, the first cut surface may be a cut surface obtained by lightly cutting the groove of the rim from the normal direction. Of course, in this case, the first cut surface may be a cut surface obtained by lightly cutting the groove of the rim from a direction different from the normal direction (however, excluding the radial direction of the groove of the rim).

<Receiving optical system>
The spectacle frame shape measuring device in the present embodiment includes a light receiving optical system (for example, a light receiving optical system 30b). The light receiving optical system has a detector (for example, a detector 37), and receives the reflected luminous flux of the measured luminous flux reflected by the first cut surface in the groove of the rim of the spectacle frame by the detector.

The light receiving optical system may have an optical member. For example, as the optical member, at least one of a lens, a mirror, an aperture, and the like may be used. Of course, for example, as the optical member, an optical member different from these optical members may be used. As described above, when the light receiving optical system has an optical member, the reflected light flux of the measured luminous flux reflected by the groove of the rim of the spectacle frame may be received by the detector via each optical member. ..

The light receiving optical system may have a configuration in which the reflected luminous flux of the measured luminous flux reflected by the groove of the rim of the spectacle frame is received by the detector. For example, the light receiving optical system may have a configuration having at least one detector. Further, the light receiving optical system may have a configuration in which the reflected luminous flux of the measured luminous flux reflected by the groove of the rim of the spectacle frame is received by the detector via a member different from the optical member.

When the light projecting optical system irradiates the measured luminous flux from the light source toward the groove of the rim of the spectacle frame to form a light cut surface on the groove of the rim, the light receiving optical system uses the light cut surface of the groove of the rim. The reflected light flux (for example, scattered light, normal reflected light, etc.) may be received by the detector.

<Positional relationship between floodlight optical system and light receiving optical system>
In the present embodiment, the light projecting optical system and the light receiving optical system may be arranged on the first cut surface of the groove of the rim of the spectacle frame in a positional relationship in which the first cross-sectional information described later can be acquired. For example, the light projecting optical system and the light receiving optical system may be arranged in an optical system configuration based on the Shine Prouk principle. Of course, for example, the light projecting optical system and the light receiving optical system may be arranged in different optical system configurations instead of the optical system configuration based on the Shine Pluke principle. As an example, it may be arranged in the configuration of the OCT optical system.

<Acquisition method>
The spectacle frame shape measuring device in the present embodiment includes an acquisition means (for example, a control unit 50). The acquisition means acquires the first cross-sectional information on the first cut surface of the groove of the rim of the spectacle frame based on the detection result of the detector in the light receiving optical system. For example, the first cross-sectional information on the first cut surface of the rim groove of the spectacle frame is the cross-sectional shape of the rim groove, the slope angle of the rim groove, and the like on the cut surface in an arbitrary direction with respect to the rim groove of the spectacle frame. The information may include at least one of the slope length of the rim shoulder, the bottom position of the rim groove, the distance to the bottom of the rim groove, and the like.

The acquisition means acquires the first cross-sectional information of the groove of the rim of the spectacle frame by processing the reflected luminous flux of the measured luminous flux reflected by the first cut surface in the groove of the rim of the spectacle frame. For example, the acquisition means may acquire the first cross-sectional information from the light receiving position of the reflected luminous flux detected by the detector. The first cross-section information may be acquired based on a signal (signal data). Further, the first cross-section information may be acquired based on an image (image data) obtained by converting a signal (signal data).

For example, in the present embodiment, the first cut surface obtained by lightly cutting the groove of the rim of the spectacle frame from the normal direction is formed by the light projecting optical system, and is reflected by the first cut surface in the normal direction of the groove of the rim. The reflected light beam of the measured light beam may be received by the detector of the light receiving optical system. In this case, the acquisition means acquires the first cross-sectional information on the first cut surface in the normal direction in the groove of the rim of the spectacle frame.

<Correction means>
The spectacle frame shape measuring device in the present embodiment includes a correction means (for example, a control unit 50). The correction means corrects the first cross-section information to the second cross-section information so that the first cut surface of the groove of the rim of the spectacle frame becomes the second cut surface in the desired direction in the groove of the rim. For example, the second cut surface in the groove of the rim in the desired direction may be a cut surface different from the first cut surface in the groove of the rim. As an example, the second cut surface may be a radial cut surface in the groove of the rim. Of course, the second cut surface may be a cut surface in a direction different from the radial direction in the groove of the rim.

Further, for example, the second cross-sectional information on the second cut surface is the cross-sectional shape of the rim groove, the slope angle of the rim groove, and the shoulder of the rim on the cut surface in the desired direction with respect to the rim groove of the spectacle frame. The information may include at least one of the slope length, the bottom position of the rim groove, the distance to the bottom of the rim groove, and the like.

For example, when the first cross-sectional information on the first cut surface of the groove of the rim of the spectacle frame is acquired as a signal (signal data), the correction means obtains the signal (signal data) of the first cross-sectional information. It may be corrected to the signal (signal data) of the cross section information. In this case, the correction means may further obtain an image (image data) of the second cross-section information from the signal (signal data) of the second cross-section information. Further, for example, when the first cross-sectional information on the first cut surface of the groove of the rim of the spectacle frame is acquired as an image (image data), the correction means obtains the image (image data) of the first cross-sectional information. It may be corrected to the image (image data) of the second cross section information. For example, when each parameter information obtained by analyzing a signal or an image is acquired as the first cross-sectional information on the first cut surface of the groove of the rim of the spectacle frame, the correction means is used for each of the first cross-sectional information. The parameter information may be corrected to each parameter information in the second cross-section information.

For example, the correction means may correct the first cross-section information to the second cross-section information based on the deviation angle of the second cut surface with respect to the first cut surface of the groove of the rim in the spectacle frame. For example, the correction means may correct the first cross-section information to the second cross-section information by setting the angle formed by the first cut surface and the second cut surface as the deviation angle of the second cut surface with respect to the first cut surface. .. Thereby, the first cut surface can be accurately replaced with the second cut surface in a desired direction.

For example, the correction means may perform correction so as to rotate the first cut surface of the groove of the rim and eliminate the deviation angle between the first cut surface and the second cut surface. As a result, the first cut surface of the groove of the rim is replaced with the second cut surface which is a virtual surface having no deviation angle, and the first cross section information is corrected to the second cross section information. That is, the first cut surface of the groove of the rim is in a state of matching (substantially matching) with the second cut surface by eliminating the deviation angle, and the first cross section information is corrected to the two cross section information.

For example, in the present embodiment, the first cut surface of the rim groove of the spectacle frame and the second cut surface different from the first cut surface of the rim groove of the spectacle frame are cut at different measurement positions on the rim groove. It may be a face. In this case, the correction means corrects the first cross-sectional information at a predetermined measurement position on the groove of the rim to the second cross-sectional information at a measurement position different from the predetermined measurement position on the groove of the rim. As an example, in the correction means, the first cut surface in the normal direction with respect to a predetermined measurement position on the groove of the rim becomes the second cut surface in the radial direction with respect to a measurement position different from the predetermined measurement position on the groove of the rim. As described above, the first cross-section information is corrected to the second cross-section information.

As a result, for example, a measurement error occurs in a part of the rim, and the first cross-section information at a predetermined measurement position of the groove of the rim cannot be obtained, so that the second cross-section information corrected from the first cross-section information cannot be obtained. Even if there is, by correcting the first cross-sectional information acquired around the predetermined measurement position of the rim groove to the cross-sectional information in the radial direction with respect to the predetermined measurement position of the rim groove, the rim groove The second cross-section information at the measurement position can be acquired.

Further, for example, in the present embodiment, the first cut surface of the groove of the rim of the spectacle frame and the second cut surface different from the first cut surface of the groove of the rim of the spectacle frame are the same measurement on the groove of the rim. It may be a cut surface with respect to the position. In this case, the correction means corrects the first cross-sectional information at the predetermined measurement position on the groove of the rim to the second cross-sectional information at the predetermined measurement position on the groove of the rim. As an example, the correction means first so that the first cut surface in the normal direction with respect to the predetermined measurement position on the groove of the rim becomes the second cut surface in the radial direction with respect to the predetermined measurement position on the groove of the rim. The cross-section information is corrected to the second cross-section information. Thereby, for example, for each measurement position on the groove of the rim, the second cross-sectional information in the desired direction in the groove of the rim can be appropriately acquired.

For example, when the correction means corrects the first cut surface at a predetermined measurement position on the groove of the rim to be the second cut surface at a measurement position different from the predetermined measurement position on the groove of the rim, the first cut. The deviation angle between the surface and the second cut surface may be expressed as a deviation angle based on the intersection position where the first cut surface and the second cut surface intersect. In this case, the correction means is the position information of the intersection position where the first cut surface and the second cut surface intersect and the reference position located on the radial plane of the rim (for example, the boxing center position of the rim, etc.). The deviation angle may be calculated based on the position information. Further, for example, the correction means corrects the first cut surface of the groove of the rim so as to eliminate the deviation angle between the first cut surface and the second cut surface by rotating the first cut surface around the intersection position. May be good. As a result, the first cross-section information is corrected to the second cross-section information.

Further, for example, when the correction means corrects the first cut surface at a predetermined measurement position on the groove of the rim to be the second cut surface at the predetermined measurement position on the groove of the rim, the first cut surface and the first 2. The deviation angle from the cut surface may be expressed as a deviation angle with respect to the apex of the groove of the rim. In this case, the correction means calculates the deviation angle based on the position information of the apex of the groove of the rim at a predetermined measurement position on the groove of the rim and the position information of the reference position located on the radial plane of the rim. You may. Further, for example, the correction means corrects the first cut surface of the groove of the rim so as to eliminate the deviation angle between the first cut surface and the second cut surface by rotating the first cut surface of the groove of the rim around the apex of the groove of the rim. May be done. As a result, the first cross-section information is corrected to the second cross-section information.

The spectacle frame shape measuring device according to the present embodiment includes a stylus unit that brings the stylus into contact with the groove of the rim of the spectacle frame, and an optical measuring unit having the above-mentioned light projecting optical system and light receiving optical system. You may. For example, the stylus unit and the optical measuring unit may be integrally moved with respect to the spectacle frame. For example, in the case of such a configuration, it is particularly effective to replace the cut surface of the groove of the rim and correct from the first cross-section information to the second cross-section information.

For example, in the stylus unit, the spectacle frame may be deformed by bringing the stylus into contact with the groove of the rim of the spectacle frame, and the position of the groove of the rim of the spectacle frame cannot be acquired correctly. For example, if a spectacle lens processed using such measurement data is framed in the spectacle frame, the spectacle lens does not fit well in the spectacle frame, which affects the finish of the spectacle. Therefore, it is considered preferable that the measuring pressure applied by the stylus to the groove of the rim when the groove of the rim of the spectacle frame comes into contact with the stylus is as weak as possible.

For example, the stylus of the stylus unit is brought into contact with the groove of the rim at a constant measuring pressure. However, when the stylus of the stylus unit is configured to be in contact with the radial direction of the groove of the rim of the spectacle frame, the measuring pressure of the stylus changes when the radial length of the rim approaches from a short position to a long position. Partially stronger. Therefore, the spectacle frame is easily deformed. However, for example, when the stylus of the stylus unit is configured to be in contact with the normal direction of the groove of the rim of the spectacle frame, the stylus can be measured even if the radial length of the rim approaches from a short position to a long position. The pressure is applied unchanged. Therefore, the spectacle frame is not easily deformed.

As an example, the spectacle frame shape measuring device is configured such that the stylus unit brings the stylus into contact with the normal direction of the groove of the rim of the spectacle frame, and the optical measuring unit moves together with the stylus unit to be optically type. Even if the measuring unit is configured to form a cut surface in the normal direction of the rim groove, by applying at least a part of the techniques in the present embodiment, the first cut surface in the normal direction in the rim groove can be obtained. , The second cut surface in the radial direction in the groove of the rim is corrected, and the second cross-sectional information in the radial direction in the groove of the rim can be easily obtained. As a result, the processing data required for processing the spectacle lens is satisfactorily created based on the cross-sectional information of the desired cut surface, and the spectacle lens can be processed with high accuracy.

The present disclosure is not limited to the apparatus described in the present embodiment. For example, terminal control software (program) that performs the functions of the above embodiment is supplied to the system or device via a network or various storage media, and the control device (for example, CPU) of the system or device reads the program. It is also possible to do it.

<Example>
An embodiment of the spectacle frame shape measuring device (hereinafter, measuring device) in the present embodiment will be described.

FIG. 1 is an external view of the measuring device 1. In this embodiment, the left-right direction of the measuring device 1 is represented by the X direction, the front-back direction is represented by the Y direction, and the vertical direction (vertical direction) is represented by the Z direction. In other words, the left-right direction, the up-down direction, and the front-back direction (the thickness direction of the rim) of the spectacle frame F held by the frame holding unit 10 described later are in the X direction, the Y direction, and the Z direction of the measuring device 1, respectively. Correspond.

For example, the measuring device 1 includes a monitor 3, a switch unit 4, a frame holding unit 10, a measuring unit 20, and the like. The monitor 3 displays various information (for example, the cross-sectional shape 41 in the groove FA of the rim of the spectacle frame F, the shape of the rim of the spectacle frame F, etc.). The monitor 3 is a touch panel, and the monitor 3 may also serve as a function of the switch unit 4. The switch unit 4 is used to make various settings (for example, start measurement, etc.). The signal corresponding to the operation instruction input from the monitor 3 and the switch unit 4 is output to the control unit 50 described later.

<Frame holding unit>
FIG. 2 is a top view of the frame holding unit 10 holding the spectacle frame F. The frame holding unit 10 holds the spectacle frame F in a desired state. For example, the frame holding unit 100 includes a holding portion base 101, a front slider 102, a rear slider 102, an opening / closing movement mechanism 110, and the like.

For example, a front slider 102 and a rear slider 103 for holding the spectacle frame F horizontally (substantially horizontal) are placed on the holding portion base 101. For example, the front slider 102 and the rear slider 103 are slidably arranged so as to face each other on the two rails 111 about the center line CL, and are always oriented toward the center line CL of both by the spring 113. It is being pulled.

For example, the front slider 102 is provided with clamp pins 130a and 130b for clamping the rim of the spectacle frame F from the thickness direction, respectively. For example, the rear slider 103 is provided with clamp pins 131a and 131b for clamping the rim of the spectacle frame F from the thickness direction, respectively. Further, for example, when measuring a template, the front slider 102 and the rear slider 103 are opened, and a well-known template holding jig is arranged and used at a predetermined mounting position 140. As the configuration of the frame holding unit 10, for example, a well-known one described in Japanese Patent Application Laid-Open No. 2000-314617 can be used.

For example, in the spectacle frame F, the lower side of the rim when wearing spectacles is located on the front slider 102 side, and the upper side of the rim is located on the rear slider 103 side. For example, the spectacle frame F is held in a predetermined measurement state by clamp pins located below and above the left and right rims, respectively.

In this embodiment, the configurations of the clamp pins 130a and 130b and the clamp pins 131a and 131b have been described as an example of the configuration for restricting the position of the rim in the front-rear direction, but the present invention is not limited to this. Well-known mechanisms may be used. For example, as a mechanism for fixing the front-rear direction of the left and right rims, a contact member (regulatory member) having a V-shaped groove may be provided for each of the left and right rims.

<Measurement unit>
The measuring unit 20 is arranged below the frame holding unit 10. For example, the measuring unit 20 includes a base portion 211, a holding unit 25, a moving unit 210, a rotating unit 260, and the like.

The base portion 211 is a rectangular frame extending in the X direction and the Y direction, and is provided below the frame holding unit 10. The holding unit 25 holds the frame measurement optical system 30, which will be described later. The moving unit 210 moves the holding unit 25 relative to the frame F by moving the holding unit 25 in the X, Y, and Z directions. The rotation unit 260 rotates the holding unit 25 about the rotation axis L0.

<Holding unit>
The holding unit 25 will be described. The holding unit 25 is provided with an opening 26. For example, the opening 26 may be provided with a transparent panel that covers the opening 26. The holding unit 25 holds the spectacle frame measurement optical system 30 inside the holding unit 25.

FIG. 3 is a schematic view of the holding unit 25 and the spectacle frame measurement optical system 30. FIG. 3A is a view showing the holding unit 25 from the upper surface direction. FIG. 3B is a view showing the holding unit 25 from the side surface direction.

For example, the spectacle frame measurement optical system 30 is composed of a light projecting optical system 30a and a light receiving optical system 30b. For example, the projection optical system 30a irradiates the measured luminous flux from the light source toward the groove of the rim of the spectacle frame F. The measured luminous flux from the projection optical system 30a is emitted from the inside of the holding unit 25 to the outside through the opening 26, and is irradiated toward the groove of the rim. For example, the light receiving optical system 30b receives the reflected luminous flux of the measured luminous flux reflected by the groove of the rim of the spectacle frame F by the detector. The reflected luminous flux of the measured luminous flux reflected in the groove of the rim of the spectacle frame F is incident from the outside to the inside of the holding unit 25 through the opening 26, and is guided toward the light receiving optical system 30b.

<Throwing optical system>
For example, the projection optical system 30a includes a light source 31, a lens 32, a slit plate 33, and a lens 34. For example, the measured luminous flux emitted from the light source 31 is collected by the lens 32 and illuminates the slit plate 33. For example, the measured luminous flux that illuminates the slit plate 33 becomes a measured luminous flux that is limited to a thin slit shape by the slit plate 33, and is irradiated to the groove FA of the rim of the spectacle frame F via the lens 34. That is, the slit light is irradiated to the groove FA of the rim of the spectacle frame F. As a result, the groove FA of the rim of the spectacle frame F is illuminated in a form of being lightly cut by the slit light.

<Receiving optical system>
For example, the light receiving optical system 30b includes a lens 36 and a detector 37 (for example, a light receiving element). For example, the lens 36 may obtain a reflected light flux of the rim groove FA (for example, scattered light of the rim groove FA, specular reflected light of the rim groove FA, etc.) acquired by reflection of the spectacle frame F at the rim groove FA. ) Is guided to the detector 37. For example, the detector 37 has a light receiving surface arranged at a position substantially conjugate with the groove FA of the rim of the spectacle frame F.

<Arrangement of floodlight optical system and light receiving optical system>
In this embodiment, the light projecting optical system 30a and the light receiving optical system 30b are arranged based on the principle of Scheimpflug. For example, a lens system (the rim groove FA and the lens of the spectacle frame F) including a cut surface in which the slit light by the light projecting optical system 30a cuts the rim groove FA of the spectacle frame F and the rim groove FA of the spectacle frame F. 36) and the light receiving surface of the detector 37 are arranged in a shine proof relationship.

Further, in the present embodiment, the light projecting axis L1 of the light projecting optical system 30a is arranged horizontally with respect to the radial plane (XY plane) in the groove FA of the rim of the spectacle frame F. That is, the light projection axis L1 of the light projection optical system 30a is arranged at an inclination angle of 0 degrees in the Z direction with respect to the radial plane in the groove FA of the rim of the spectacle frame F.

For example, the light projection axis L1 of the light projection optical system 30a is arranged so that the slit light by the light source 31 is emitted from the normal direction with respect to the groove FA of the rim of the spectacle frame F. That is, for example, the light projecting optical axis L1 of the light projecting optical system 30a is irradiated with the slit light by the light source 31 from the direction perpendicular to the tangent to the groove FA of the rim in the radial plane of the rim of the eyeglass frame F. Is placed in. As a result, the cut surface due to the slit light is orthogonal to the groove FA of the rim of the spectacle frame F. In other words, the depth direction of the rim groove FA of the spectacle frame F and the cut surface due to the slit light are parallel.

Further, in the present embodiment, the imaging optical axis L2 of the light receiving optical system 30b has an inclination angle with respect to the light projecting optical axis L1 of the light projecting optical system 30a on the radial plane in the groove FA of the rim of the spectacle frame F. It is arranged so as to be inclined at β. Further, in the present embodiment, the imaging optical axis L2 of the light receiving optical system 30b is arranged so as to be tilted at an inclination angle γ in the Z direction of the spectacle frame F with respect to the projection optical axis L1 of the projection optical system 30a. The optical axis. That is, the imaging optical axis L2 of the light receiving optical system 30b is inclined with respect to the light projecting optical axis L1 of the light projecting optical system 30a at an inclination angle β in the XY direction and at an inclination angle γ in the Z direction. Be placed.

<Moving unit>
The mobile unit 210 will be described. 4 to 6 are views for explaining the measurement unit 20. FIG. 4 is a top perspective view of the measurement unit 20. FIG. 5 is a bottom perspective view of the measuring unit 20. FIG. 6 is a top perspective view of the Z-direction moving unit 220 and the Y-direction moving unit 230, which will be described later (a perspective view in a state where the base portion 211 and the X-direction moving unit 240 are removed).

For example, the moving unit 210 includes a base portion 211, a Z-direction moving unit 220, a Y-direction moving unit 230, an X-direction moving unit 240, and the like. For example, the base portion 211 is a rectangular frame extending in the X direction and the Y direction, and is arranged below the frame holding unit 10. For example, the Z-direction moving unit 220 moves the holding unit 25 in the Z direction. For example, the Y-direction moving unit 230 holds the holding unit 25 and the Z-direction moving unit 220, and moves them in the Y direction. For example, the X-direction moving unit 240 holds the holding unit 25, the Z-direction moving unit 220, and the Y-direction moving unit 230, and moves them in the X direction.

For example, the X-direction moving unit 240 is roughly configured as follows. For example, the X-direction moving unit 240 includes a guide rail 241 extending in the X-direction below the base portion 211. For example, the Y base 230a of the Y direction moving unit 230 is attached to the guide rail 241 so as to be movable in the X direction. For example, a motor 245 is attached to the base portion 211. For example, a feed screw 242 extending in the X direction is attached to the rotating shaft of the motor 245. For example, the nut portion 246 fixed to the Y base 230a is screwed into the feed screw 242. As a result, when the motor 245 is rotated, the Y base 230a is moved in the X direction.

For example, the Y-direction moving unit 230 is roughly configured as follows. For example, a guide rail (not shown) extending in the Y direction is attached to the Y base 230a. For example, a Z base 220a is attached to the guide rail so as to be movable in the Y direction. For example, a motor 235 for moving in the Y direction and a rotatable feed screw 232 extending in the Y direction are attached to the Y base 230a. For example, the rotation of the motor 235 is transmitted to the feed screw 232 via a rotation transmission mechanism such as a gear. For example, the feed screw 232 is screwed with a nut 227 attached to the Z base 220a. As a result, when the motor 235 is rotated, the Z base 220a is moved in the Y direction.

For example, the X-direction moving unit 240 and the Y-direction moving unit 230 constitute an XY-direction moving unit. For example, the moving position of the holding unit 25 in the XY direction is detected by the control unit 50, which will be described later, by detecting the number of pulses for driving the motor 245 and the motor 235. For example, the moving position of the holding unit 25 in the XY direction may be detected by using a sensor such as an encoder attached to the motors 245 and 235.

For example, the Z-direction moving unit 220 is roughly configured as follows. For example, the Z base 220a is formed with a guide rail 221 extending in the Z direction, and the moving base 250a to which the holding unit 25 is attached is movably held in the Z direction along the guide rail 221. For example, a pulse motor 225 for moving in the Z direction is attached to the Z base 220a, and a feed screw (not shown) extending in the Z direction is rotatably attached to the Z base 220a. For example, it is screwed into a nut attached to the base 250a of the holding unit 25. For example, the rotation of the motor 225 is transmitted to the feed screw 222 via a rotation transmission mechanism such as a gear, and the rotation of the feed screw 222 causes the holding unit 25 to move in the Z direction.

For example, the moving position of the holding unit 25 in the Z direction is detected by the control unit 50, which will be described later, by detecting the number of pulses for driving the motor 225. For example, the moving position of the holding unit 25 in the Z direction may be detected by using a sensor such as an encoder attached to the motor 225.

The moving mechanisms in the X, Y, and Z directions as described above are not limited to this embodiment, and well-known mechanisms can be adopted. For example, instead of linearly moving the holding unit 25, the holding unit 25 may be moved with respect to the center of the rotation base by starting an arc (see, for example, Japanese Patent Application Laid-Open No. 2006-350264).

<Rotating unit>
The rotating unit 260 will be described. FIG. 7 is a schematic view of the rotating unit 260. For example, the rotation unit 260 changes the XY direction in which the opening 26 faces by rotating the holding unit 25 around the rotation axis LO extending in the Z direction. For example, the rotation unit 260 includes a rotation base 261. For example, the holding unit 25 is attached to the rotation base 261. For example, the rotation base 261 is rotatably held around a rotation axis LO extending in the Z direction. For example, a large diameter gear 262 is formed on the outer circumference of the lower portion of the rotation base 261. For example, the rotating unit 260 has a mounting plate 252. For example, a motor 265 is attached to the attachment plate 252. For example, a pinion gear 266 is fixed to the rotation shaft of the motor 265, and the rotation of the pinion gear 266 is transmitted to the large diameter gear 262 via a gear 263 rotatably provided on the mounting plate 252. Therefore, the rotation of the motor 265 causes the rotation base 261 to rotate about the axis of the rotation axis LO. For example, the rotation of the motor 265 is detected by the encoder 265a integrally attached to the motor 265, and the rotation angle of the rotation base 261 is detected from the output of the encoder 265a. The origin position of the rotation of the rotation base 261 is detected by an origin position sensor (not shown). The moving mechanism of the rotating unit 260 as described above is not limited to this embodiment, and a well-known mechanism can be adopted.

In this embodiment, the rotation axis LO of the rotation unit 260 is set as an axis passing through the light source 31 of the projection optical system 30a. That is, the rotation unit 260 rotates about the light source 31 of the projection optical system 30a. Of course, the rotation axis LO of the rotation unit 260 may have different positions as the rotation axis. For example, the rotation axis LO of the rotation unit 260 may be set as an axis passing through the detector 37 of the light receiving optical system 30b.

<Control unit>
FIG. 8 is a diagram showing a control system of the measuring device 1. For example, a monitor 3, a switch unit 4, a light source 31, a detector 37, an encoder 265a, each motor, a non-volatile memory 52 (hereinafter, memory 52), and the like are electrically connected to the control unit 50.

For example, the control unit 50 includes a CPU (processor), RAM, ROM, and the like. For example, the CPU controls each member in the measuring device 1. Further, for example, the CPU functions as a calculation unit that performs various calculation processes such as calculation of the cross-sectional shape of the groove FA of the rim based on the output signals from each sensor. For example, RAM temporarily stores various types of information. For example, the ROM stores various programs, initial values, and the like for controlling the operation of the measuring device 1. The control unit 50 may be composed of a plurality of control units (that is, a plurality of processors).

For example, the memory 75 is a non-transient storage medium capable of retaining the stored contents even when the power supply is cut off. For example, as the memory 75, a hard disk drive, a flash ROM, a USB memory, or the like can be used.

<Control operation>
The control operation of the measuring device 1 will be described.

The operator causes the frame holding unit 10 to hold the frame by widening the distance between the front slider 102 and the rear slider 102 and clamping the upper and lower sides of the rim of the spectacle frame F with clamp pins.

Subsequently, the operator operates the switch unit 4 to start the measurement of the groove FA of the rim. In this embodiment, the groove FA in the left rim FL is measured first, and then the groove FA in the right rim FR is measured. Of course, the right rim FR may be measured first, and the left rim FL may be measured later.

<Measurement of rim and acquisition of captured image>
FIG. 9 is a diagram for explaining the irradiation position of the measured luminous flux on the groove FA of the rim. 9 (a) and 9 (b) show different irradiation positions of the measured luminous flux with respect to the groove FA of the rim. The control unit 50 controls the drive of at least one of the X-direction moving unit 240, the Y-direction moving unit 230, the Z-direction moving unit 220, and the rotating unit 260 based on the measurement start signal, and controls the holding unit 25. Move from the retracted position to the initial position. As a result, the irradiation position of the measured luminous flux by the projection optical system 30a is set at the measurement position T1 of the groove FA of the rim. For example, the measurement position T1 of the groove FA of the rim is set to a position of a predetermined radial angle α (position of 0 degrees in this embodiment) with reference to the geometric center position B of the rim. Of course, the measurement position T1 of the groove FA of the rim may be set to a position of an arbitrary radial angle α.

Subsequently, the control unit 50 turns on the light source 31 of the projection optical system 30a and directs it toward the measurement position T1 of the groove FA of the rim (the position of the groove FA in the radial angle α of the rim). The measured luminous flux is irradiated from the linear direction. The slit light from the light source 31 cuts the groove FA of the rim light in the normal direction passing through the measurement position T1 of the groove FA of the rim. That is, the slit light from the light source 31 forms the first cut surface 45 (see FIG. 12B) in the normal direction passing through the measurement position T1 of the groove FA of the rim. Further, the reflected light flux reflected by the groove FA of the rim is guided to the light receiving optical system 30b and received by the detector 37. The control unit 50 can acquire an image captured from the normal direction at the measurement position T1 of the groove FA of the rim (in other words, an image captured by the first cut surface 45) based on the light receiving result of the detector 37. .. For example, the control unit 50 moves the holding unit 25 in the measurement traveling direction G, and captures images in which the measurement position T1, the measurement position T2, the measurement position T3, ..., And the measurement position Tn of the groove FA of the rim are photocut from the normal direction. Get an image.

<Acquisition of first cross-sectional shape>
FIG. 10 is an example of the captured image 40 from the normal direction in the groove FA of the rim. For example, the control unit 50 analyzes the captured image 40 and detects the first cross-sectional shape 41 in the normal direction in the groove FA of the rim. For example, the control unit 50 detects the luminance values of the captured image 40 in the order of scanning line S1, scanning line S2, scanning line S3, ..., Scanning line Sn, and obtains a luminance distribution. For example, since the reflected luminous flux is detected by the detector 37, the brightness value increases when the first cross-sectional shape 41 is present on the captured image 40. For example, the control unit 50 can extract the first cross-sectional shape 41 from the captured image 40 by detecting the change in the brightness value of the captured image 40 in this way.

For example, the control unit 50 calculates the acquisition position of the captured image 40 by using at least one of the number of pulses of the motor 225, the number of pulses of the motor 235, the number of pulses of the motor 245, and the detection result of the encoder 265a, and rims. The first cross-sectional shape 41 of the groove FA is associated with the groove FA and stored in the memory 52. As a result, the three-dimensional cross-sectional shape in the normal direction of the groove FA of the rim is acquired.

<Correction from the first cross-sectional shape to the second cross-sectional shape>
FIG. 11 is a diagram showing various parameters obtained from the first cross-sectional shape 41 of the groove FA of the rim. In this embodiment, the captured image 40 from the normal direction of the groove FA of the rim is acquired at each measurement position in the groove FA of the rim of the spectacle frame F, and the first image in the normal direction of the groove FA of the rim is obtained. The cross-sectional shape 41 is detected. Therefore, the distance K1 to the bottom of the rim groove FA, the left and right slope angles θ1 and θ2 of the rim groove FA, the left and right slope lengths K2 and K3 of the rim groove FA, the left and right rim shoulder lengths K4, and so on. Parameters such as K5 and the like are acquired as parameters with respect to the normal direction of the groove FA of the rim.

However, for example, in a spectacle lens peripheral processing apparatus for processing the peripheral edge of a spectacle lens (for example, Japanese Patent Application Laid-Open No. 2013-178432), the spectacles are based on each parameter with respect to the radial direction of the groove FA of the rim of the spectacle frame F. The peripheral edge of the spectacle lens is processed by pressing the lens against a grindstone or the like while rotating the lens for each radius angle α. Therefore, in the control unit 170, the first cut surface 45 in the normal direction of the groove FA of the rim becomes the second cut surface 65 in the radial direction of the groove FA of the rim (see FIG. 12B). The image 40 captured from the normal direction of the groove FA of the rim is corrected to the corrected image 60 (see FIG. 13) in the radial direction of the groove FA of the rim. As a result, the first cross-sectional shape 41 in the normal direction of the groove FA of the rim is corrected to the second cross-sectional shape 61 in the radial direction of the groove FA of the rim, and the parameter of the groove FA of the rim with respect to the normal direction is changed to the rim. It is converted into a parameter with respect to the radial direction of the groove FA.

FIG. 12 is a diagram showing a first cut surface 45 in the normal direction with respect to the groove FA of the rim and a second cut surface 65 in the radial direction. FIG. 12A shows a state in which the first cut surface 45 and the second cut surface 65 with respect to the groove FA of the rim are viewed from the thickness direction (Z direction) of the rim. FIG. 12B shows a state in which the first cut surface 45 and the second cut surface 65 with respect to the groove FA of the rim are viewed from the inside of the rim. First, the control unit 170 calculates the angle (deviation angle ε) formed by the first cut surface 45 and the second cut surface 65 in the groove of the rim.

The control unit 170 calculates the radius angle α of the measurement position Tn based on the position coordinates at the measurement position Tn of the groove FA of the rim and the position coordinates of the geometric center position B of the rim. For example, the position coordinates of the measurement position Tn are expressed with reference to the position coordinates of the geometric center position B (that is, the origin). For example, the control unit 170 obtains the angle formed by two line segments, the horizontal line H with respect to the geometric center position B of the rim and the straight line connecting the measurement position Tn and the geometric center position B, to obtain the measurement position Tn. Calculate the radial angle α.

Further, the control unit 170 uses the position coordinates of the measurement position Tn-1, which is the measurement position before the measurement position Tn of the groove FA of the rim, and the position coordinates of the measurement position Tn of the groove FA of the rim, to measure the measurement position Tn. (That is, the light projection axis L1) is obtained. For example, since the measurement position Tn-1 and the measurement position Tn are close to each other, the perpendicular to the straight line connecting the position coordinates of the measurement position Tn-1 and the position coordinates of the measurement position Tn is regarded as the normal line of the measurement position Tn. be able to. Further, the control unit 170 calculates the normal angle δ of the measurement position Tn by obtaining the angle formed by the two line segments, the normal line of the measurement position Tn and the horizontal line H with respect to the geometric center position B of the rim. To do.

The control unit 170 makes a second cut in the radial direction with respect to the first cut surface 45 in the normal direction of the measurement position Tn based on the radial angle α of the measurement position Tn and the normal angle δ of the measurement position Tn. Calculate the surface deviation angle ε. For example, the control unit 170 can obtain the deviation angle ε by subtracting the radius angle α from the normal angle δ.

FIG. 13 shows a first cross-sectional shape 41 on the first cut surface 45 in the normal direction of the groove FA of the rim and a second cross-sectional shape 61 on the second cut surface 65 in the radial direction of the groove FA of the rim. It is a figure. FIG. 13A shows the distance K1a to the bottom of the groove FA of the rim in the first cross-sectional shape 41. FIG. 13B shows the distance K1b to the bottom of the groove FA of the rim in the second cross-sectional shape 61. The control unit 170 uses the first cut surface 45 as the second cut surface with the measurement position Tn as the center, based on the angle (deviation angle ε) formed by the first cut surface 45 and the second cut surface 65 in the groove of the rim. Rotate so as to match (substantially match) 65. As a result, the first cross-sectional shape 41 in the normal direction in the groove of the rim is corrected, and the second cross-sectional shape 61 in the radial direction is acquired.

For example, the control unit 170 sets the measurement position Tn of the groove FA of the rim at each pixel position (coordinate position) of the first cross-sectional shape 41 in the depth direction of the groove FA of the rim (in other words, the height direction of the bevel). By multiplying the expansion / contraction ratio E of the above, the second cross-sectional shape 61 obtained by converting the first cross-sectional shape 41 from the normal direction to the radial direction is obtained. Further, for example, the control unit 170 has a distance (distance K1b), a slope angle, a slope length, and a rim shoulder length from such a second cross-sectional shape 61 to the groove FA with respect to the radial direction of the groove FA of the rim. , Etc. to get the parameters. The expansion / contraction ratio E can be calculated by the following mathematical formula using the deviation angle ε of the measurement position Tn in the groove FA of the rim.

For example, the control unit 170 corrects the captured image 40 (first cross-sectional shape 41) acquired at the measurement position T1, the measurement position T2, the measurement position T3, ..., The measurement position Tn of the groove FA of the rim. By performing the above, a corrected image 60 (second cross-sectional shape 61) obtained by correcting the captured image 40 is acquired for each radial angle α over the entire circumference of the rim. Further, for example, the control unit 170 associates the acquisition position of the correction image 60 based on the captured image 40 with the second cross-sectional shape 61 of the groove FA of the rim and stores it in the memory 175. In this embodiment, the acquisition position of the captured image 40 and the acquisition position of the corrected image 60 are the same positions. As a result, the three-dimensional cross-sectional shape of the groove FA of the rim in the radial direction is acquired.

<Acquisition of eyeglass frame shape and rim groove depth>
For example, the control unit 170 can acquire the shape of the rim of the spectacle frame F from the three-dimensional cross-sectional shape of the groove FA of the rim in the radial direction. For example, the control unit 170 detects the bottom 43 from the second cross-sectional shape 61 in the corrected image 60 for a plurality of radial angles α of the groove FA of the rim, and acquires the shape of the rim of the spectacle frame based on the detection result. To do. For example, the control unit 170 acquires the position information of the bottom 43 of the groove FA of the rim based on the acquisition position of the corrected image 60 of the groove FA of the rim and the position of the bottom 43 for each radius angle α. To do. For example, by this, the control unit 170 may acquire the three-dimensional shape (rn, Zn, θn) (n = 1, 2, 3, ..., N) of the rim of the spectacle frame F.

Further, for example, the control unit 170 can acquire the depth of the groove FA of the rim of the spectacle frame F from the three-dimensional cross-sectional shape in the radial direction of the groove FA of the rim. For example, the control unit 170 detects the distance K1b from the second cross-sectional shape 61 in the corrected image 60 for a plurality of radial angles α of the groove FA of the rim, and based on the detection result, the groove FA of the rim of the spectacle frame. Get the depth. For example, the control unit 170 determines the depth of the groove FA of the rim (in other words, the height of the bevel) based on the acquisition position where the corrected image 60 of the groove FA of the rim is acquired and the distance K1b for each radius angle α. ) To get.

The shape of the rim of the spectacle frame F, the depth of the rim groove FA, and the like based on the second cross-sectional shape 61 of the rim groove FA acquired by using the measuring device 1 are for processing the spectacle lens. It may be transmitted to the spectacle lens processing apparatus. The control unit of the spectacle lens processing apparatus may receive such information and process the peripheral edge of the spectacle lens based on the information.

As described above, for example, the spectacle frame shape measuring device in the present embodiment acquires the first cross-sectional information on the first cut surface of the groove of the rim of the spectacle frame, and the first cut surface of the groove of the rim is formed. The first cross-section information is corrected to the second cross-section information so as to be the second cut surface in the desired direction in the groove of the rim. Thereby, the second cross-sectional information in the desired direction in the groove of the rim can be appropriately acquired. Further, even if the first cross-section information cannot be obtained in the predetermined region of the rim, the groove of the rim is based on the first cross-section information obtained in the vicinity of the predetermined region of the rim. It is possible to acquire the second cross-sectional information in a desired direction in a predetermined region.

Further, for example, in the spectacle frame shape measuring device of the present embodiment, the first cross-sectional information is provided in the second cross section so that the first cut surface of the groove of the rim becomes the second cut surface in the radial direction of the groove of the rim. Correct to information. Thereby, the second cross-sectional information in the radial direction in the groove of the rim can be appropriately acquired. For example, in the processing of a spectacle lens, since the data in the radial direction in the groove of the rim is constructed, the second cross-sectional information in the radial direction can be easily used without being compatible.

Further, for example, in the spectacle frame shape measuring device of the present embodiment, the first cut surface of the groove of the rim is the rim based on the deviation angle of the second cut surface with respect to the first cut surface of the groove of the rim of the spectacle frame. The first cross-section information is corrected to the second cross-section information so that it becomes the second cut surface in the desired direction in the groove. Thereby, the first cut surface can be accurately replaced with the second cut surface in a desired direction, and appropriate second cross-section information can be obtained.

Further, for example, the spectacle frame shape measuring device in this embodiment acquires the first cut surface in the normal direction in the groove of the rim. As a result, the first cross-sectional information is second so that the first cut surface in the normal direction in the groove of the rim becomes the second cut surface in the desired direction (for example, the radial direction) in the groove of the rim. It is corrected to the cross section information. Therefore, for example, even in a configuration in which the groove of the rim is photocut from the normal direction, cross-sectional information in a desired direction (radial direction) in the groove of the rim can be appropriately obtained.

<Example of transformation>
In this embodiment, a configuration in which a captured image 40 in the normal direction in the groove FA of the rim is acquired and corrected to a correction image 60 in the radial direction in the groove FA of the rim is described as an example. , Not limited to this. For example, the signal data in the normal direction in the groove FA of the rim may be acquired and corrected to the signal data in the radial direction in the groove FA of the rim. In this case, the control unit 170 can convert the signal data of the first cross-sectional shape 41 into the signal data of the second cross-sectional shape 61 and acquire various parameters in the radial direction in the groove FA of the rim.

Further, in this embodiment, the image 40 captured in the normal direction in the groove FA of the rim is corrected to the corrected image 60 in the radial direction to acquire various parameters in the radial direction in the groove FA of the rim. Has been described as an example, but the present invention is not limited to this. For example, by acquiring various parameters in the normal direction in the groove FA of the rim from the image 40 in the normal direction in the groove FA of the rim and considering the expansion / contraction ratio E for these parameters, the groove of the rim It may be configured to acquire various parameters in the radial direction in FA.

In this embodiment, the measurement position where the groove FA of the rim is located has been described by taking as an example a configuration in which the captured image 40 in the normal direction is corrected to the corrected image 60 in the radial direction, but the present invention is not limited to this. .. That is, the configuration in which the acquisition position of the captured image 40 and the acquisition position of the corrected image 60 in the groove FA of the rim are the same has been described as an example, but the present invention is not limited to this. For example, the captured image 40 with respect to the normal direction obtained at the measurement position with the groove FA of the rim may be corrected to the correction image 60 in the radial direction at the measurement position different from the measurement position with the groove FA of the rim. It is possible. That is, the acquisition position of the captured image 40 and the acquisition position of the corrected image 60 in the groove FA of the rim can be set to different positions.

For example, even in such a case, the control unit 170 has a normal direction with respect to the measurement position with the groove FA of the rim and a radial direction with respect to the measurement position position different from the measurement position with the groove FA of the rim. By obtaining the deviation angle ε of, the captured image 40 (first cross-sectional shape 41) can be corrected to the corrected image 60 (second cross-sectional shape 61). Thereby, for example, even in a situation where the captured image 40 cannot be obtained at a part of the measurement position of the rim, the corrected image 60 can be acquired by using the captured image 40 at the measurement position around the rim.

In this embodiment, the configuration in which the captured image 40 in the normal direction is acquired by irradiating each measurement position in the groove FA of the rim with the measured luminous flux from the normal direction has been described as an example. Not limited to this. For example, depending on the shape of the rim, the range of motion of the holding unit 25, etc., it is not always possible to irradiate the measurement position with the measured luminous flux from the normal direction. To be acquired.

At this time, the control unit 170 obtains a deviation angle between the direction different from the normal direction with respect to the measurement position with the groove FA of the rim and the normal direction with respect to the measurement position with the groove FA of the rim, and obtains the deviation angle of the groove FA of the rim. A first corrected image obtained by correcting an image captured in a direction different from the normal direction with respect to a certain measurement position in the normal direction may be acquired. After that, the deviation angle between the normal direction with respect to the measurement position with the groove FA of the rim and the radial direction with respect to the measurement position with the groove FA of the rim is obtained, and the normal direction with respect to the measurement position with the groove FA of the rim is the first. A second corrected image obtained by correcting the first corrected image in the radial direction may be acquired.

Of course, the control unit 170 obtains a deviation angle between the direction different from the normal direction with respect to the measurement position with the groove FA of the rim and the radial direction with respect to the measurement position with the groove FA of the rim, and obtains the deviation angle of the groove FA of the rim. A second corrected image obtained by correcting an image captured in a direction different from the normal direction with respect to a certain measurement position in the radial direction may be acquired.

In this embodiment, when the captured image 40 with respect to the normal direction of the groove FA of the rim is corrected to the corrected image 60 with respect to the radial direction of the groove FA of the rim, the depth direction of the groove FA of the rim (the bevel) is used. The configuration in which the expansion / contraction ratio E in the height direction is taken into consideration has been described as an example, but the present invention is not limited to this. For example, in addition to the expansion / contraction rate E in the depth direction of the groove FA of the rim, the correction may be performed in consideration of the expansion / contraction rate in the thickness direction (in other words, the width direction of the bevel) of the groove FA of the rim. Further, for example, in addition to the expansion / contraction ratio E in the depth direction of the groove FA of the rim, correction may be performed in consideration of the curvature of the rim.

In this embodiment, the configuration in which the spectacle frame shape measuring device includes an optical measuring unit having a light projecting optical system and a light receiving optical system has been described as an example, but the present invention is not limited thereto. For example, the spectacle frame shape measuring device may include a stylus unit having a stylus pressed against the groove of the rim and a detector for detecting the position of the stylus together with the optical measuring unit. Good. For example, the stylus unit and the optical measuring unit may be integrally moved with respect to the spectacle frame.

For example, since the stylus unit may deform the rim by pressing the stylus against the groove of the rim, it is considered preferable to keep the measuring pressure weak. As an example, by controlling the stylus to be pressed against the groove of the rim from the normal direction, the measurement pressure can be kept weak and uniform. However, in this case, in the optical measuring unit, the direction in which the first cut surface is formed in the groove of the rim by the light projecting optical system is limited to the normal direction which is the same (substantially the same) as the stylus unit. Therefore, in particular, in such a spectacle frame shape measuring device provided with a stylus unit and an optical measuring unit, correction from the first cross-section information to the second cross-section information is effective. In both the stylus unit and the optical measuring unit, data that can be used for processing the spectacle lens is appropriately acquired.

1 Eyeglass frame shape measuring device 3 Monitor 4 Switch part 10 Frame holding unit 20 Measuring unit 25 Holding unit 30a Floodlight optical system 30b Light receiving optical system 50 Control unit 52 Memory 220 Z direction moving unit 230 Y direction moving unit 240 X direction moving unit 260 rotating unit

Claims (6)

An eyeglass frame shape measuring device that measures the shape of an eyeglass frame.
A projection optical system that irradiates a measurement light beam from a light source toward a groove of the rim of the spectacle frame and forms a first cut surface in the groove of the rim.
A light receiving optical system that receives the reflected luminous flux of the measured luminous flux reflected by the first cut surface of the groove of the rim with a detector, and
An acquisition means for acquiring first cross-sectional information on the first cut surface of the groove of the rim based on the detection result of the detector.
A correction means for correcting the first cross-section information to the second cross-section information so that the first cut surface of the rim groove becomes the second cut surface in the desired direction in the rim groove.
A spectacle frame shape measuring device characterized by being provided with. In the spectacle frame shape measuring device of claim 1,
The desired direction in the groove of the rim is the radial direction in the groove of the rim.
The correction means corrects the first cross-section information to the second cross-section information so that the first cut surface of the groove of the rim becomes the second cut surface in the radial direction of the groove of the rim. A spectacle frame shape measuring device characterized by. In the spectacle frame shape measuring device of claim 1 or 2.
In the correction means, based on the deviation angle of the second cut surface with respect to the first cut surface, the first cut surface of the groove of the rim becomes the second cut surface of the groove of the rim in the desired direction. A spectacle frame shape measuring device, characterized in that the first cross-sectional information is corrected to the second cross-sectional information. In the spectacle frame shape measuring device according to any one of claims 1 to 3.
The first cut surface is a cut surface in the normal direction in the groove of the rim.
The spectacle frame shape measuring device is characterized in that the acquisition means acquires the first cross-sectional information on the first cut surface in the normal direction in the groove of the rim. In the spectacle frame shape measuring device according to any one of claims 1 to 4.
A stylus unit having a stylus pressed against a groove of the rim of the spectacle frame and a detector for detecting the position of the stylus.
An optical measuring unit having the floodlight optical system and the light receiving optical system,
With
A spectacle frame shape measuring device characterized in that the stylus unit and the optical measuring unit are integrally moved with respect to the spectacle frame. This is an eyeglass frame shape measurement program used in an eyeglass frame shape measuring device that measures the shape of an eyeglass frame.
By being executed by the processor of the spectacle frame shape measuring device,
A projection step of irradiating a measurement light beam from a light source toward a groove of the rim of the spectacle frame and forming a first cut surface in the groove of the rim.
A light receiving step in which the detector receives the reflected luminous flux of the measured luminous flux reflected by the first cut surface of the groove of the rim.
Based on the detection result of the detector, the acquisition step of acquiring the first cross-sectional information on the first cut surface of the groove of the rim, and the acquisition step.
A correction step of correcting the first cross-section information to the second cross-section information so that the first cut surface of the rim groove becomes the second cut surface in the desired direction in the rim groove.
Is executed by the spectacle frame shape measuring device.

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