Title:
DIAPHRAGM BLADE AND DIAPHRAGM MECHANISM HAVING THE SAME
Document Type and Number:
Japanese Patent JP2015102589
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a diaphragm blade that has an excellent antireflection effect and is capable of withstanding high-speed movement.SOLUTION: In a diaphragm blade 1, a plurality of blades are overlapped, an opening is provided in an optical path, and the diaphragm diameter of the opening is variable. Black fine irregularities 13 are provided on at least one of surfaces 11 and 12 of a feather base material 10. Ribs 11a and 12a are set up in at least part of the peripheral part of the surface where the black fine irregularities are provided. Accordingly, the diaphragm blade 1 slides while the ribs 11a and 12a of adjoining diaphragm blades 1 come into contact with each other.
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Inventors:
KINOSHITA TOSHIHISA
SASAKI NAOTO
SASAKI NAOTO
Application Number:
JP2013240967A
Publication Date:
June 04, 2015
Filing Date:
November 21, 2013
Export Citation:
Assignee:
RICOH IMAGING CO LTD
International Classes:
G03B9/02; G03B9/06
Domestic Patent References:
| JP2013217984A | 2013-10-24 | |||
| JP2010186157A | 2010-08-26 | |||
| JP2006023365A | 2006-01-26 | |||
| JP2012068511A | 2012-04-05 | |||
| JP2002107597A | 2002-04-10 | |||
| JPH05134292A | 1993-05-28 | |||
| JP2002202543A | 2002-07-19 | |||
| JP2000301607A | 2000-10-31 | |||
| JPH09189935A | 1997-07-22 | |||
| JPH0590459U | 1993-12-10 |
Foreign References:
| US5422697A | 1995-06-06 |
Attorney, Agent or Firm:
Takaishi Tachibana
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