Title:
LENS DEVICE
Document Type and Number:
Japanese Patent JP2021036276
Kind Code:
A
Abstract:
To provide a lens device that enables a switch operation of an aperture opening shape whose diameter varies in conjunction with a rotation operation of an aperture operation member to vary at an arbitrary position.SOLUTION: A lens device comprises: a first diaphragm device that includes an even number of aperture blades, a support member supporting a rotation center pin of the aperture blade, and a cam member a movable pin of the aperture blade engages with; a second diaphragm device that is different in a phase of the aperture blade from the first diaphragm device; an aperture operation member that revolves a stationary barrel external periphery; and a switch operation member that switches the number of aperture blades. According to an operation of the switch operation member, a state where the aperture blade of the first aperture device of the aperture blade of the first aperture device and the aperture blade of the second aperture device restricts an amount of light, and a state where both blades of the aperture blade of the first aperture device and the aperture blade of the second aperture device restrict the amount of light are switched.SELECTED DRAWING: Figure 1
Inventors:
SHIBAZAKI TAKESHI
TANAKA YUHEI
SUGIYAMA TOMOHIKO
TANAKA YUHEI
SUGIYAMA TOMOHIKO
Application Number:
JP2019157527A
Publication Date:
March 04, 2021
Filing Date:
August 30, 2019
Export Citation:
Assignee:
CANON KK
International Classes:
G03B9/06; G02B7/02
Attorney, Agent or Firm:
Takuma Abe
Sogo Kuroiwa
Sogo Kuroiwa