Eyeglass frame shape measurement device and lens processing device

Patent metadata

Field	Value
Publication number	US-11226196-B2
Application number	US-201816635308-A
Country	US
Kind code	B2
Filing date	Jun 6, 2018
Priority date	Jul 31, 2017
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

An eyeglass frame shape measurement device measures a shape of an eyeglass frame. The eyeglass frame shape measurement device includes a light projecting optical system that has a light source and emits measurement light from the light source toward a groove of a rim of an eyeglass frame, a light receiving optical system that has a detector and causes the detector to receive reflected light of the measurement light emitted toward the groove in the rim of the eyeglass frame by the light projecting optical system and reflected by the groove of the rim of the eyeglass frame, an acquisition section that acquires a cross-sectional shape of the groove of the rim of the eyeglass frame on the basis of the reflected light received by the detector, and a luminance control section that controls a luminance level of the reflected light to be received by the detector.

First claim

The invention claimed is:

1. An eyeglass frame shape measurement device that measures a shape of an eyeglass frame, comprising:
a light projecting optical system having a light source and configured to emit measurement light from the light source toward a groove of a rim of an eyeglass frame;
a light receiving optical system having a detector and configured to cause the detector to receive reflected light of the measurement light emitted toward the groove of the rim of the eyeglass frame by the light projecting optical system and reflected by the groove of the rim of the eyeglass frame;
a controller, comprising a processor, a memory and programming having an acquisition section and a luminance control section;
the acquisition section is configured to acquire a cross-sectional shape of the groove of the rim of the eyeglass frame based on the reflected light received by the detector; and
the luminance control section is configured to control a luminance level of the reflected light to be received by the detector;
the eyeglass frame shape measurement device further comprises a first changing section comprising a translational motor drive for translational movement and a rotation motor drive for rotational movement and configured to change an irradiation position of the measurement light with respect to the groove of the rim of the eyeglass frame; and
wherein the controller further comprises a first control section configured to control the first changing section.

2. The eyeglass frame shape measurement device according to claim 1 ,
wherein the luminance control section controls the luminance level based on the luminance level of the reflected light received by the detector.

3. The eyeglass frame shape measurement device according to claim 2 ,
wherein the acquisition section acquires a cross-sectional image as the cross-sectional shape,
the controller further comprises a luminance analysis section configured to detect the luminance level from the cross-sectional image, and
the luminance control section controls the luminance level based on the luminance level detected by the luminance analysis section.

4. The eyeglass frame shape measurement device according to claim 2 ,
wherein the controller further comprises a determination section configured to determine whether or not the luminance level is an acceptable level, and
wherein the luminance control section controls the luminance level based on a determination result of the determination section.

5. The eyeglass frame shape measurement device according to claim 1 ,
wherein the controller further comprises an eyeglass frame type information acquisition section configured to acquire eyeglass frame type information,
wherein the luminance control section controls the luminance level based on the eyeglass frame type information acquired by the eyeglass frame type information acquisition section.

6. The eyeglass frame shape measurement device according to claim 1 ,
wherein the luminance control section controls the luminance level by controlling an amount of the measurement light projected from the light source.

7. The eyeglass frame shape measurement device according to claim 1 ,
wherein the luminance control section controls the luminance level by controlling a gain of the detector.

8. The eyeglass frame shape measurement device according to claim 1 ,
wherein the acquisition section acquires the cross-sectional shape of the groove of the rim of the eyeglass frame based on the reflected light which is received by the detector after the luminance level is controlled to be changed by the luminance control section.

9. The eyeglass frame shape measurement device according to claim 1 ,
wherein the first control section controls the first changing section to irradiate the groove of the rim at a plurality of vector angles of the eyeglass frame with the measurement light,
the acquisition section acquires the cross-sectional shape of the groove of the rim at each of the plurality of vector angles of the eyeglass frame, and
the controller further comprises an analysis section configured to detect a bottom of the groove of the rim at each of the plurality of vector angles of the eyeglass frame from the cross-sectional shape of the groove of the rim at the plurality of vector angles of the eyeglass frame to acquire a shape of the eyeglass frame based on the detected detection result.

10. A lens processing device for processing a peripheral edge of a lens, comprising:
a lens processing controller configured to process a peripheral edge of a lens based on a cross-sectional shape of a groove of the rim of the eyeglass frame acquired by the eyeglass frame shape measurement device according to claim 1 .

11. An eyeglass frame shape measurement device that measures a shape of an eyeglass frame, comprising:
a light projecting optical system having a light source and configured to emit measurement light from the light source toward a groove of a rim of an eyeglass frame;
a light receiving optical system having a detector and configured to cause the detector to receive reflected light of the measurement light emitted toward the groove of the rim of the eyeglass frame by the light projecting optical system and reflected by the groove of the rim of the eyeglass frame;
a controller, comprising a processor, a memory and programming having an acquisition section and a luminance control section;
a changing section comprising a translational motor drive for translational movement and a rotation motor drive for rotational movement and configured to change a light receiving position of the reflected light by the light receiving optical system; and
the controller further comprising a control section configured to control the changing section;
wherein the acquisition section is configured to acquire a cross-sectional shape of the groove of the rim of the eyeglass frame based on the reflected light received by the detector; and
the luminance control section is configured to control a luminance level of the reflected light to be received by the detector.

12. The eyeglass frame shape measurement device according to claim 11 ,
wherein the luminance control section controls the luminance level based on the luminance level of the reflected light received by the detector.

13. The eyeglass frame shape measurement device according to claim 12 ,
wherein the acquisition section acquires a cross-sectional image as the cross-sectional shape,
the controller further comprises a luminance analysis section configured to detect the luminance level from the cross-sectional image, and
the luminance control section controls the luminance level based on the luminance level detected by the luminance analysis section.

14. The eyeglass frame shape measurement device according to claim 12 ,
wherein the controller further comprises a determination section configured to determine whether or not the luminance level is an acceptable level, and
wherein the luminance control section controls the luminance level based on a determination result of the determination section.

15. The eyeglass frame shape measurement device according to claim 11 ,
wherein the controller further comprises an eyeglass frame type information acquisition section configured to acquire eyeglass frame type information,
wherein the luminance control section controls the luminance level based on the eyeglass frame type information acquired by the eyeglass frame type information acquisition section.

16. The eyeglass frame shape measurement device according to claim 11 ,
wherein the luminance

Assignees

• Nidek Kk

Inventors

• Takii Michihiro
• Mizukoshi Kunihito
• Ishii Tomoya
• Takeichi Kyoji

Classifications

• B24B9/14

  of optical work, e.g. lenses, prisms {(control of the position of the tool for bevelling optical work B24B47/225)} · CPC title

• G01B11/24 Primary

  for measuring contours or curvatures · CPC title

• G01B11/25 Primary

  by projecting a pattern, e.g. {one or more lines,} moiré fringes on the object (G01B11/255 takes precedence {; image analysis for depth or shape recovery G06T7/50}) · CPC title

• B24B9/148

  electrically, e.g. numerically, controlled · CPC title

• G02C13/00

  Assembling (producing spectacle frames from plastics or from substances in a plastic state B29D12/02); Repairing; Cleaning (disinfection or sterilisation of contact lenses A61L12/00) · CPC title