Device for the display of engravement shape of eyeglass lens and method and apparatus for machining lens peripheral edge using the display device

• US 6,328,635 B1
• Filed: 03/08/2000
• Issued: 12/11/2001
• Est. Priority Date: 03/08/1999
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Suzuki, Yasuo, Nakamura, Takeshi
• Primary Examiner(s): Hail, III, Joseph J.
• Assistant Examiner(s): MCDONALD, SHANTESE L
• Application Number:
  US09/521,426
• Time in Patent Office: 643 Days
• Field of Search: 451/42, 451/43, 451/255, 451/256, 451/240, 451/5, 451/8
• US Class Current: 451/43
• CPC Class Codes: B24B 47/22 Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
• CPC Class Codes: B24B 49/12 involving optical means
• CPC Class Codes: B24B 9/146 Accessories, e.g. lens mounting devices

Abstract

A lens peripheral edge machining apparatus includes a judging device which judges the type of each of eyeglass lenses on the basis of an edge thickness shape thereof and which classifies the eyeglass lenses into groups, a display which displays the groups to which the eyeglass lenses belong in a distinguishable manner on the basis of the result of the judgment made by the judging device, an engravement information adjuster which adjusts engravement information at an arbitrary circumferential edge position of the other lens peripheral shape in accordance with the group information to which one eyeglass lens belongs and the group information to which the other eyeglass lens belongs both displayed on the display, and a machining controller which makes controller to machine a peripheral edge of the other eyeglass lens in accordance with engravement information after the adjustment.

Claims

1. A device for the display of an engravement shape of an eyeglass lens, said device comprising:

means for measuring an edge thickness of each of unmachined eyeglass lenses at a portion of a lens peripheral shape of an eyeglass frame on the basis of data on the lens peripheral shape of the eyeglass frame;

means for judging a type of each of the eyeglass lenses on the basis of the edge thickness and for classifying the eyeglass lenses into groups comprising plus lenses, flat lenses and minus lenses; and

a display for displaying an engravement shape of an edge end of each eyeglass lens after each of the eyeglass lenses has been machined along the lens peripheral shape as an estimated engravement shape, and displaying said group of the plus lenses, the flat lenses or the minus lenses to which each eyeglass lens belongs on the basis of the result of the judgment made by said judging means.

2. A method for machining a peripheral edge of an eyeglass lens, said method comprising the steps of:

classifying unmachined right and left eyeglass lenses into groups comprising plus lenses, flat lenses and minus lenses in accordance with edge thicknesses at lens peripheral shape portions of right and left eyeglass lens frame portions of an eyeglass frame;

displaying on a display the group of the plus lenses, the flat lenses or the minus lenses to which the right and left eyeglass lenses belong;

machining a peripheral edge of one of the unmachined eyeglass lenses in accordance with data on one lens peripheral shape of the right and left eyeglass lens frame portions;

then, when a peripheral edge of the other unmachined eyeglass lens is to be machined in accordance with data on the other lens peripheral shape of the right and left eyeglass frame portions, adjusting engravement information at an arbitrary circumferential edge position of the other lens peripheral shape in accordance with information as to which group of the plus lenses, the flat lenses or the minus lenses one eyeglass lens belongs and information as to which group of the plus lenses, the flat lenses or the minus lenses the other eyeglass lens belongs both displayed on said display; and

machining the peripheral edge of the other eyeglass lens in accordance with the thus-adjusted engravement information.

3. An apparatus for machining a peripheral edge of an eyeglass lens, said apparatus comprising:

means for measuring an edge thickness of each of unmachined eyeglass lenses at a portion of a lens peripheral shape of an eyeglass frame on the basis of data on the lens peripheral shape of the eyeglass frame;

means for judging a type of each of the eyeglass lenses on the basis of the shape of the edge thickness and for classifying the eyeglass lenses into groups comprising plus lenses, flat lenses and minus lenses;

a display for displaying an engravement shape of an edge end of each eyeglass lens after each of the eyeglass lenses has been machined along the lens peripheral shape as an estimated engravement shape, and displaying said group of the plus lenses, the flat lenses or the minus lenses to which each eyeglass lens belongs on the basis of the result of the judgment made by said judging means;

means for adjusting an engravement information at an arbitrary circumferential edge position of the other lens peripheral shape in accordance with information as to which group of the plus lenses, the flat lenses or the minus lenses one eyeglass lens belongs and information as to which group of the plus lenses, the flat lenses or the minus lenses the other eyeglass lens belongs both displayed on said display; and

means for machining a peripheral edge of the other eyeglass lens in accordance with engravement information after the adjustment.