Title:
LIGHT QUANTITY CONTROLLER AND OPTICAL EQUIPMENT
Document Type and Number:
Japanese Patent JP2002287203
Kind Code:
A
Abstract:
To provide a light quantity controller constituted so that the machining of the sliding surface in the controller with high surface accuracy and the secondary working may be unnecessary, besides, electrification due to the sliding may be prevented without interrupting the smooth action of the controller.
As for the light quantity controller provided with movable members 2 and 3 which are moved in order to change the light quantity, slidable films are formed on at least the sliding surfaces 7m and 7a to 7d of the member 7 sliding with the movable members.
Inventors:
TAKADA YOSHIO
Application Number:
JP2001093194A
Publication Date:
October 03, 2002
Filing Date:
March 28, 2001
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/02; G03B9/06; G03B9/08; G03B9/10; G03B9/14; G03B9/24; G03B17/02; H04N5/225; H04N5/238; H04N101/00; (IPC1-7): G03B9/02; G03B9/06; G03B9/08; G03B9/10; G03B9/14; G03B9/24; G03B17/02; H04N5/225; H04N5/238
Attorney, Agent or Firm:
Masayuki Kishida (2 outside)