Title:
LIGHT VOLUME ADJUSTMENT DEVICE AND OPTICAL APPARATUS
Document Type and Number:
Japanese Patent JP2015219339
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To achieve a light volume adjustment device that is small, has the minimum number of components, and makes difference in light volume that reaches an imaging element small according to the position of a light shielding member.SOLUTION: Chamfering performed to a section forming the aperture of at least one sheet of light shielding members in a throttle device or a shutter device that adjusts the amount of light that reaches an imaging element by two or more sheets of the light shielding members. Further, chamfering is performed to both/either imaging element side of a section forming the aperture of the light shielding member nearest to the imaging element side and/or subject side of a section forming the aperture of the light shielding member nearest to the subject side of two or more sheets of the light shielding members.
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Inventors:
KUROSAWA AKIRA
YOSHIZAWA TAKAHITO
YOSHIZAWA TAKAHITO
Application Number:
JP2014102043A
Publication Date:
December 07, 2015
Filing Date:
May 16, 2014
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G03B9/02; G03B9/06; G03B9/24; G03B9/36
Domestic Patent References:
| JP2004138865A | 2004-05-13 | |||
| JPH08262530A | 1996-10-11 | |||
| JPH01254077A | 1989-10-11 |