Title:
絞り装置及びそれを有するレンズ装置及び撮像装置
Document Type and Number:
Japanese Patent JP6624786
Kind Code:
B2
Abstract:
A stop apparatus includes blades each having a drive pin, a support member supporting pivot members of the blades, and a cam member having cams engaging with the drive pins. The blades form an aperture. The cam member includes cams of which the largest radial distances from the center of the aperture are different from each other. The blades include first blades and second blades. The radial distance from the center of the drive pins of the first blades and that of the drive pins of the second blades are different from each other in an open aperture state. The pivot members of the first and second blades are disposed at positions at a radial distance from the center shorter than the radial distance from the center of a drive pin having the longest radial distance from the center in the open aperture state among the drive pins.
Inventors:
Kamo Daichi
Application Number:
JP2015008247A
Publication Date:
December 25, 2019
Filing Date:
January 20, 2015
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B9/06; G03B9/02
Domestic Patent References:
| JP2007033903A | ||||
| JP2012123299A |
Attorney, Agent or Firm:
Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito
Takao Ochi
Koji Yoshizawa
Masami Saito