Title:
BLADE DRIVING DEVICE AND OPTICAL DEVICE
Document Type and Number:
Japanese Patent JP2017058679
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a small-sized blade driving device which forms a circular light passage aperture from an open state to a small aperture diameter, and to provide an optical device.SOLUTION: The blade driving device comprises an aperture forming member forming an aperture part allowing light to pass therethrough, a blade group disposed around the aperture part of the aperture forming member, a turning member for turning the blade group around the aperture part, first engagement parts provided on the turning member and engaged with the blade group, and second engagement parts provided on the aperture forming member and engaged with the blade group, and is characterized in that a plurality of blade groups are provided and first engagement parts and second engagement parts in the plurality of blade groups overlap each other in an optical axis direction being a normal direction of the aperture part.SELECTED DRAWING: Figure 1
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Inventors:
YOSHIZAWA TAKAHITO
SHIBATA MITSUO
SHIBATA MITSUO
Application Number:
JP2016181466A
Publication Date:
March 23, 2017
Filing Date:
September 16, 2016
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/00
Domestic Patent References:
| JP2013029693A | 2013-02-07 | |||
| JP2007163827A | 2007-06-28 | |||
| JP2016099395A | 2016-05-30 | |||
| JP2008203601A | 2008-09-04 | |||
| JP2001033844A | 2001-02-09 |
Foreign References:
| US20120057859A1 | 2012-03-08 |
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