Title:
LENS CENTERING METHOD, LENS WORKING METHOD, AND LENS
Document Type and Number:
Japanese Patent JP3840154
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently and stably center a lens in a lens centering machine.
SOLUTION: The lens is centered by rotating at a high speed by sandwiching a surface A and a surface B of the lens W under low pressure by bell holders 1 and 2. After completing such centering, a side peripheral surface of the lens W is worked into a true circle by a grinding wheel 5 by reducing a rotating speed. The difficulty of centering and friction between the bell holders 1 and 2 are predicted by surface roughness and a centering factor on the basis of a shape of the lens W, and efficiency and stabilization of the centering action are attained by controlling a centering condition such as a centering rotating speed, centering time and lens sandwiching force at centering time.
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| WO/2013/079821 | METHOD OF PREPARING AN OPHTHALMIC LENS |
| WO/1995/003918 | A SHAPING MACHINE FOR ORGANIC MATERIAL LENSES, IN PARTICULAR BUT NOT SOLELY CORRECTIVE LENSES |
| WO/2007/093620 | PROCESS FOR EDGING OPTICAL LENSES |
Inventors:
Kenji Fujiwara
Application Number:
JP2002204989A
Publication Date:
November 01, 2006
Filing Date:
July 15, 2002
Export Citation:
Assignee:
Canon Inc
International Classes:
B24B9/14; G02B7/00; (IPC1-7): B24B9/14; G02B7/00
Domestic Patent References:
| JP2001225265A | ||||
| JP11156688A | ||||
| JP2002036086A | ||||
| JP5004156A | ||||
| JP5086456U | ||||
| JP64087143A | ||||
| JP58160051A |
Attorney, Agent or Firm:
Yoshiro Sakamoto