Spectacle lens chamfering data preparing method, spectacle lens chamfering method, spectacle lens chamfering data preparing apparatus, and spectacle lens chamfering apparatus

• US 20020045403A1
• Filed: 10/16/2001
• Published: 04/18/2002
• Est. Priority Date: 10/17/2000
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Topcon
• Original Assignee: Kabushiki Kaisha Topcon
• Inventors: Hatano, Yoshiyuki, Watanabe, Takahiro, Iwai, Toshihiro
• Granted Patent: US 6,688,944 B2
• Time in Patent Office: Days
• US Class Current: 451/5
• 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
• CPC Class Codes: G05B 2219/45162 Chamfer grinding
• CPC Class Codes: G05B 2219/45175 Glasses, spectacles

Abstract

Methods and apparatuses for spectacle lens chamfering, wherein a predetermined chamfer width is inputted from a peripheral edge of a lens shape of a spectacle frame and a chamfer locus on a refraction plane of a spectacle lens is obtained.

Claims

1. A spectacle lens chamfering data creation method comprising steps of:

entering spectacle frame lens shape information and a predetermined chamfer width; and

calculating a chamfer locus on a refraction plane of a spectacle lens having the lens shape obtained by using the lens shape information.

5. The spectacle lens chamfering data creation method as claimed in claim 1, wherein chamfer width values at several points of the spectacle lens shape (periphery) are entered to obtain the chamfer locus according to the chamfer width values at the respective points.

9. A spectacle lens chamfering method comprising steps of:

obtaining a chamfer locus by using the spectacle lens chamfering data creation method claimed in claim 1;

calculating a spectacle lens edge thickness along the obtained chamfer locus; and

performing chamfering.

13. A spectacle lens chamfering method comprising steps of:

obtaining a chamfer locus by using the spectacle lens chamfering data creation method claimed in claim 5;

calculating a spectacle lens edge thickness along the obtained chamfer locus; and

performing chamfering.

2. A spectacle lens chamfering data creation method comprising steps of:

entering spectacle frame lens shape information and a predetermined chamfer width; and

obtaining data on a lens edge/shape along a chamfer locus on a refraction plane of a spectacle lens having the lens shape obtained by using the lens shape information.

6. The spectacle lens chamfering data creation method as claimed in claim 2, wherein chamfer width values at several points of the spectacle lens shape (periphery) are entered to obtain the chamfer locus according to the chamfer width values at the respective points.

10. A spectacle lens chamfering method comprising steps of:

obtaining a chamfer locus by using the spectacle lens chamfering data creation method claimed in claim 2;

calculating a spectacle lens edge thickness along the obtained chamfer locus; and

performing chamfering.

3. A spectacle lens chamfering data creation method comprising steps of:

entering spectacle frame lens shape information and a reference chamfer width at a radius vector at a predetermined angle of the lens shape information;

entering a minimum chamfer width at a radius vector at another angle of the lens shape information; and

obtaining a chamfer locus on a refraction plane of a spectacle lens by using a position of the reference chamfer as one reference and a position of the minimum chamfer as another reference.

7. The spectacle lens chamfering data creation method as claimed in claim 3, wherein chamfer width values at several points of the spectacle lens shape (periphery) are entered to obtain the chamfer locus according to the chamfer width values at the respective points.

11. A spectacle lens chamfering method comprising steps of:

obtaining a chamfer locus by using the spectacle lens chamfering data creation method claimed in claim 3;

calculating a spectacle lens edge thickness along the obtained chamfer locus; and

performing chamfering.

18. An apparatus for preparing spectacle lens chamfering data as claimed in claim 14, wherein said chamfer width input means inputs a chamfer width in a normal line direction from each of peripheral edge points of the lens shape of the spectacle frame, and said computing means determines a chamfer locus with a chamfer end position at each of the peripheral edge points as a reference.

19. An apparatus for preparing spectacle lens chamfering data as claimed in claim 15, wherein said chamfer width input means inputs a chamfer width in a normal line direction from each of peripheral edge points of the lens shape of the spectacle frame, and said computing means determines a chamfer locus with a chamfer end position at each of the peripheral edge points as a reference.

20. An apparatus for preparing spectacle lens chamfering data as claimed in claim 16, wherein said chamfer width input means inputs a chamfer width in a normal line direction from each of peripheral edge points of the lens shape of the spectacle frame, and said computing means determines a chamfer locus with a chamfer end position at each of the peripheral edge points as a reference.

21. An apparatus for preparing spectacle lens chamfering data as claimed in claim 17, wherein said chamfer width input means inputs a chamfer width in a normal line direction from each of peripheral edge points of the lens shape of the spectacle frame, and said computing means determines a chamfer locus with a chamfer end position at each of the peripheral edge points as a reference.

22. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 14.

23. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 15.

24. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 16.

25. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 17.

26. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 18.

27. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 19.

28. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 20.

29. An apparatus for chamfering a spectacle lens, the apparatus comprising a chamfering wheel for chamfering a spectacle lens on the basis of edge thickness shape data of the spectacle lens obtained along a chamfer locus, said chamfer locus being obtained using the spectacle lens chamfering data preparing apparatus as claimed in claim 21.

4. A spectacle lens chamfering data creation method comprising steps of:

entering spectacle frame lens shape information and a reference chamfer width at a radius vector at a predetermined angle of the lens shape information;

entering a minimum chamfer width at a radius vector at another angle of the lens shape information;

obtaining a chamfer locus on a refraction plane of a spectacle lens by using a position of the reference chamfer as one reference and a position of the minimum chamfer as another reference; and

obtaining data on a spectacle lens edge thickness/shape along the chamfer locus.

8. The spectacle lens chamfering data creation method as claimed in claim 4, wherein chamfer width values at several points of the spectacle lens shape (periphery) are entered to obtain the chamfer locus according to the chamfer width values at the respective points.

12. A spectacle lens chamfering method comprising steps of:

obtaining a chamfer locus by using the spectacle lens chamfering data creation method claimed in claim 4;

calculating a spectacle lens edge thickness along the obtained chamfer locus; and

performing chamfering.

14. An apparatus for preparing spectacle lens chamfering data, the apparatus comprising a lens shape input means for inputting lens shape data of a spectacle frame, a chamber width input means for inputting a predetermined chamber width from a peripheral edge of the inputted lens shape, and a computing means for determining a chamfer locus on a refraction plane of a spectacle lens from the inputted chamfer width.

15. An apparatus for preparing spectacle lens chamfering data, the apparatus comprising a lens shape data input means for inputting lens shape data of a spectacle frame, a chamfer width input means for inputting a predetermined chamfer width from a peripheral edge of the inputted lens shape, a computing means for determining a chamfer locus on a refraction plane of a spectacle lens from the inputted chamfer width, and an edge thickness shape data input means for inputting edge thickness shape data of the spectacle lens along the chamfer locus thus determined.

16. An apparatus for preparing spectacle lens chamfering data, the apparatus comprising a lens shape data input means for inputting lens shape data of a spectacle lens, a chamfer width input means for inputting a chamfer width of a reference chamfer from a first peripheral edge of the inputted lens shape and inputting a chamfer width of a minimum chamfer from a second peripheral edge of the lens shape in another meridian direction, and a computing means for determining a chamfer locus on a refraction plane of a spectacle lens with a chamfer end position of said reference chamfer and that of said minimum chamfer as a reference.

17. An apparatus for preparing spectacle lens chamfering data, the apparatus comprising a lens shape data input means for inputting lens shape data of a spectacle frame, a chamfer width input means for inputting a chamfer width of a reference chamfer from a first peripheral edge of the inputted lens shape and inputting a chamfer width of a minimum chamfer from a second peripheral edge of the lens shape in another meridian direction, a computing means for determining a chamfer locus on a refraction plane of a spectacle lens with a chamfer end position of said reference chamfer and that of said minimum chamfer as a reference, and an edge thickness shape data input means for inputting edge thickness shape data of the spectacle lens along said chamfer locus.