Eyeglass lens processing apparatus and processing control data generating program

• US 9,561,572 B2
• Filed: 01/16/2014
• Issued: 02/07/2017
• Est. Priority Date: 01/17/2013
• Status: Active Grant

• Current Assignee: Nidek Company Limited
• Original Assignee: Nidek Company Limited
• Inventors: Takeichi, Kyoji
• Primary Examiner(s): Rampuria, Satish
• Application Number:
  US14/156,510
• Publication Number:
  US 20140199916A1
• Time in Patent Office: 1,118 Days
• Field of Search: 700157-203
• US Class Current: 1/1
• CPC Class Codes: B24B 51/00 Arrangements for automatic control of a series of individual steps in grinding a workpiece if applicable to other machine tools, G05B takes precedence
• CPC Class Codes: B24B 9/148 electrically, e.g. numerically, controlled

Abstract

An eyeglass lens processing apparatus configured to form, on a peripheral edge of a lens, a bevel or a groove for fitting the lens to a frame of an eyeglass, includes: a data calculating unit for calculating data of the bevel or the groove to be formed on the peripheral edge of the lens based on frame shape data of the frame or demonstration lens shape data which is shape data of a demonstration lens having the bevel or the groove fitted to the shape of the frame; and a correction unit for approximating a front-side foot width, which is a width between a position of the bevel or the groove to be formed on the lens and a position of a front edge of the lens, to a target value by correcting the data of the bevel or the groove calculated by the data calculating unit.

Claims

1. An eyeglass lens processing apparatus comprising:

a processing unit configured to form, on a peripheral edge of a lens, a bevel or a groove for fitting the lens to a frame of an eyeglass;

a processor; and

memory storing computer readable instructions, when executed by the processor, causing the eyeglass lens processing apparatus to;

calculate data of the bevel or the groove to be formed on the peripheral edge of the lens based on frame shape data of the frame or demonstration lens shape data which is shape data of a demonstration lens having the bevel or the groove fitted to the shape of the frame; and

approximate a front-side foot width, which is a width between a position of the bevel or the groove to be formed on the lens and a position of a front edge of the lens, to a target value by correcting the calculated data of the bevel or the groove;

wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to acquire at least one of spherical component data, cylindrical component data, and distortional component data based on the shape of the frame or the demonstration lens; and

wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to reflect distortional component data in the corrected data of the bevel or the groove.

2. The eyeglass lens processing apparatus according to claim 1, wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to approximate a maximum value of the front-side foot width to the target value within a range in which an amount of change of the calculated data of the bevel or the groove is equal to or less than a threshold value.

3. The eyeglass lens processing apparatus according to claim 2, wherein the threshold value is set based on at least one of a type of the frame and a type of the lens.

4. The eyeglass lens processing apparatus according to claim 1, wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to calculate the data of the bevel or the groove based on at least the spherical component data acquired by the shape data acquiring means.

5. The eyeglass lens processing apparatus according to claim 1, wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to correct the data of the bevel or the groove by changing at least one of spherical component data and cylindrical component data.

6. The eyeglass lens processing apparatus according to claim 1, wherein the target value is set based on a rim thickness of the frame.

7. A non-transitory computer readable recording medium storing a program for generating data for controlling an operation of an eyeglass lens processing apparatus configured to, on a peripheral edge of a lens, a bevel or a groove for fitting the lens to a frame of an eyeglass, the program including computer readable instructions, when executed by a processor of a generating device, causing the generating device to:

calculate data of the bevel or the groove to be formed on a peripheral edge of the lens based on frame shape data of the frame or demonstration lens shape data which is shape data of a demonstration lens having the bevel or the groove fitted to the shape of the frame; and

approximate a front-side foot width, which is a width between a position of the bevel or the groove and a position of a front edge of the lens, to a target value by correcting the calculated data of the bevel or the groove;

wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to acquire at least one of spherical component data, cylindrical component data, and distortional component data based on the shape of the frame or the demonstration lens; and

wherein the computer readable instructions, when executed by the processor, causes the eyeglass lens processing apparatus to reflect distortional component data in the corrected data of the bevel or the groove.

8. A method for generating data for controlling an operation of an eyeglass lens processing apparatus configured to, on a peripheral edge of a lens, a bevel or a groove for fitting the lens to a frame of an eyeglass, the method comprising:

calculating data of the bevel or the groove to be formed on the peripheral edge of the lens based on frame shape data of the frame or demonstration lens shape data which is shape data of a demonstration lens having the bevel or the groove fitted to the shape of the frame; and

approximating a front-side foot width, which is a width between a position of the bevel or the groove and a position of a front edge of the lens, to a target value by correcting the calculated data of the bevel or the groove;

acquiring at least one of spherical component data, cylindrical component data, and distortional component data based on the shape of the frame or the demonstration lens; and

reflecting distortional component data in the corrected data of the bevel or the groove.

9. An eyeglass lens processing apparatus comprising:

a processing unit configured to form, on a peripheral edge of a lens, a bevel or a groove for fitting the lens to a frame of an eyeglass;

a processor; and

memory storing computer readable instructions, when executed by the processor, causing the eyeglass lens processing apparatus to;

calculate data of the bevel or the groove to be formed on the peripheral edge of the lens based on frame shape data of the frame or demonstration lens shape data which is shape data of a demonstration lens having the bevel or the groove fitted to the shape of the frame; and

acquire cylindrical component data based on the frame shape data of the frame or the demonstration lens shape data;

change the acquired cylindrical component data;

correct the calculated data of the bevel or the groove based on the changed cylindrical component data; and

approximate a front-side foot width, which is a width between a position of the bevel or the groove to be formed on the lens and a position of a front edge of the lens, to a target value based on the corrected data of the bevel or the groove.