Title:
LENS SHAPE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP3919582
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To accurately measure a peripheral shape of a lens by a simple mechanism.
SOLUTION: Styluses 60, 61 capable of respectively abutting on a convex surface 1a and a concave surface 1b of the lens are supported so as to be displaced along a shaft 64 parallel with a lens holding shaft 41, and energized in a direction approaching to each other to regulate the displacement of the styluses 60, 61 at a specified retracting position. Locking members 681, 682 are provided, which accepts the axial displacement of the styluses 60, 61 after displacing the styluses 60, 61 to a position capable of abutting on the lens. The locking members 681, 682 are synchronously driven between the retracting position and the position capable of abutting on the lens, the styluses 60, 61 are displaced to the position capable of abutting on the lens and in the state allowing the axial displacement, the displacement is measured by linear scales 600, 601.
Inventors:
Sagawa, Masahiko
Application Number:
JP2002000105567
Publication Date:
February 23, 2007
Filing Date:
April 08, 2002
Export Citation:
Assignee:
HOYA CORP
International Classes:
G01B5/20; G02C13/00; B24B9/14; G01B5/20; G02C13/00; B24B9/06; (IPC1-7): B24B9/14; G02C13/00