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Patent Searching and Data


Title:
APERTURE DEVICE, CAMERA, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/018047
Kind Code:
A1
Abstract:
An aperture device is provided which is capable of simultaneously reducing the number of components and improving characteristics of shading etc. An aperture device (1) of the present invention is provided with: a pair of aperture blades (3,4) which overlap each other and form an aperture opening; a filter base plate (5) which has an infrared cut filter layer formed on the entirety of one main surface; an aperture drive unit (7) which relatively moves the pair of aperture blades (3,4) to adjust the size of the aperture opening; and a filter drive unit (8) which moves the filter base plate back and forth with respect to the optical path of light incident through the aperture opening. The filter base plate (5) has an ND filter layer (42) in the center region thereof, and the ND filter layer (42) is arranged concentric to the aperture opening.

Inventors:
TOMARU TAKASHI (JP)
KOHRI NAOMICHI (JP)
HARASAWA DAISUKE (JP)
Application Number:
PCT/JP2011/067773
Publication Date:
February 09, 2012
Filing Date:
August 03, 2011
Export Citation:
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Assignee:
JAPAN PREC INSTR INC (JP)
TOMARU TAKASHI (JP)
KOHRI NAOMICHI (JP)
HARASAWA DAISUKE (JP)
International Classes:
G03B9/02; G02B5/00; G03B9/14; G03B11/00
Domestic Patent References:
WO2004107036A12004-12-09
Foreign References:
JP2007017594A2007-01-25
JPH05110938A1993-04-30
JPH0915681A1997-01-17
JPH05292392A1993-11-05
Attorney, Agent or Firm:
ANIYA Setuo et al. (JP)
Ani store Setsuo (JP)
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Claims: