Title:
羽根駆動装置及び光学装置
Document Type and Number:
Japanese Patent JP6654640
Kind Code:
B2
Abstract:
A blade driving device includes an opening forming member, and a plurality of groups of blades that are pivotably disposed in a ring form around an opening portion of the opening forming member. The plurality of groups of blades include a first group of blades and a second group of blades, in a process of changing from a first circular light passage opening formed by the first group to a second circular light passage opening formed by the second group, the first group that is adjacent to the second group and has finished forming the first circular light passage opening remains in the opening portion, thereby acting to substantially suppressing warp, in an optical axis direction, of the second group that forms the second circular light passage opening on an inner side thereof.
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Inventors:
Takahito Yoshizawa
Mitsuo Shibata
Mitsuo Shibata
Application Number:
JP2017540030A
Publication Date:
February 26, 2020
Filing Date:
September 16, 2016
Export Citation:
Assignee:
Canon Electronics Inc.
International Classes:
G03B9/06
Domestic Patent References:
| JP2014206768A | ||||
| JP2013029693A | ||||
| JP2004184486A | ||||
| JP9189936A | ||||
| JP4031129U | ||||
| JP2006053409A |
Attorney, Agent or Firm:
Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu