Title:
羽根駆動装置及び光学装置
Document Type and Number:
Japanese Patent JP6924009
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:
Mitsuo Shibata
Takahito Yoshizawa
Takahito Yoshizawa
Application Number:
JP2016181467A
Publication Date:
August 25, 2021
Filing Date:
September 16, 2016
Export Citation:
Assignee:
Canon Electronics Inc.
International Classes:
G03B9/02; G03B9/06
Domestic Patent References:
| JP2014206768A | ||||
| JP2013029693A | ||||
| JP2002090798A |
Attorney, Agent or Firm:
Patent Business Corporation Otsuka International Patent Office
Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu
Yasunori Otsuka
Yasuhiro Otsuka
Shiro Takayanagi
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu