Title:
LIGHT QUANTITY ADJUSTER
Document Type and Number:
WIPO Patent Application WO/2008/032520
Kind Code:
A1
Abstract:
A light quantity adjuster (1) comprises a ground board (60) having an optical path
opening (61); a first blade (20), an auxiliary blade (30) and a second blade (50)
for adjusting the optical path opening (61) to a fully opened state, a fully closed
state or a slightly restricted state by moving straight in the opposite directions;
and a drive lever (70) for driving a pair of blades by being coupled therewith and
rotated. A stopper (63) for regulating the rotary range of the drive lever (70)
is provided and the pair of blades adjusts the optical path opening (61) to the
slightly restricted state when the drive lever (70) is located at one end of the
rotary range regulated by the stopper (63).
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Inventors:
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
MIKAMI MAKOTO (JP)
NAKANO TAKASHI (JP)
MIKAMI MAKOTO (JP)
Application Number:
PCT/JP2007/065940
Publication Date:
March 20, 2008
Filing Date:
August 16, 2007
Export Citation:
Assignee:
SEIKO PRECISION KK (JP)
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
MIKAMI MAKOTO (JP)
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
MIKAMI MAKOTO (JP)
International Classes:
G03B9/00
Foreign References:
| JP2002107792A | 2002-04-10 | |||
| JPH11190867A | 1999-07-13 | |||
| JPH11194384A | 1999-07-21 | |||
| JPH11194387A | 1999-07-21 | |||
| JP2004109531A | 2004-04-08 |
Attorney, Agent or Firm:
KATAYAMA, Shuhei (6-1 Kyobashi 1-chome,Chuo-ku, Tokyo 31, JP)
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