Title:
EX形多焦点レンズのヤゲン軌跡決定方法及びEX形多焦点レンズ加工装置
Document Type and Number:
Japanese Patent JP4562343
Kind Code:
B2
Abstract:
Enabling the formation of a suitable bevel in special lenses such as an EX lens even by a person not skilled in the art. When a bevel is formed on an EX lens, the value of the bevel curve is decided based on the value of the curve of the concave face (S711), a reference axis of the bevel curve is decided in the same direction as the direction of the curvature of the concave face (S712), a reference position on the peripheral edge in the portion having the minimum thickness at the lower side in the vertical direction is decided based on the thickness of the portion having the minimum thickness (S713), a correction for the initial reference axis of the bevel curve is obtained based on the ratio of the thickness of the portion having the maximum thickness at the upper side in the vertical direction to the thickness of the portion having the minimum thickness (S714), an angle of inclination of the axis from the direction of the initial reference axis of the bevel curve is obtained based on the correction (S715) and the locus of the bevel is decided based on the value of the bevel curve, the reference position and the angle of inclination of the axis (S716).
Inventors:
Masahiro Jimbo
Koji Daimaru
Koji Daimaru
Application Number:
JP2002105229A
Publication Date:
October 13, 2010
Filing Date:
April 08, 2002
Export Citation:
Assignee:
HOYA CORPORATION
International Classes:
G02C13/00; B24B1/00; B24B9/14; B24B19/03; B24B47/22
Other References:
特開2001-259979
特開平11-70451
特開平11-70451
Attorney, Agent or Firm:
Aniya Setsuo
Toru Yui
Hitoshi Kiyono
Toru Yui
Hitoshi Kiyono