Title:
LIGHT AMOUNT ADJUSTING DEVICE AND OPTICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/001638
Kind Code:
A1
Abstract:
A light amount adjusting device (1) is provided with a base plate (80) having an opening (81), linearly movable blades (30, 50) linearly movably supported by the base plate (80), and a rockable blade (60) rockably supported by the base plate (80). The linearly movable blades (30, 50) and the rockable blade (60) form a fully open state by retracting from the opening (81), and the linearly movable blades (30, 50) form a fully closed state by covering the opening (81). The rockable blade (60) has an aperture opening (61) having a smaller diameter than the opening (81). When the opening (81) and the aperture opening (61) are superposed on each other, a small aperture state is formed.
Inventors:
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
CHAROENSILPUTTHAKUN PRAPAS (TH)
NAKANO TAKASHI (JP)
CHAROENSILPUTTHAKUN PRAPAS (TH)
Application Number:
PCT/JP2009/054203
Publication Date:
January 07, 2010
Filing Date:
March 05, 2009
Export Citation:
Assignee:
SEIKO PRECISION KK (JP)
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
CHAROENSILPUTTHAKUN PRAPAS (TH)
NUMNUAL PHICHET (TH)
NAKANO TAKASHI (JP)
CHAROENSILPUTTHAKUN PRAPAS (TH)
International Classes:
G03B9/00; G03B9/10; G03B9/26
Foreign References:
| JP2004138953A | 2004-05-13 | |||
| JP2005091496A | 2005-04-07 | |||
| JP2003161979A | 2003-06-06 | |||
| JP2004205557A | 2004-07-22 |
Attorney, Agent or Firm:
KATAYAMA, SHUHEI (JP)
Shuhei Katayama (JP)
Shuhei Katayama (JP)
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