Title:
DIAPHRAGM UNIT AND LENS BARREL
Document Type and Number:
Japanese Patent JP2022150116
Kind Code:
A
Abstract:
To provide a diaphragm unit and a lens barrel which improve diaphragm accuracy.SOLUTION: A diaphragm unit includes: a plurality of diaphragm blades having each of first protrusions and second protrusions; a first opening member having a plurality of grooves for engaging with each of the first protrusions; a second opening member having a plurality of holes for engaging with each of the second protrusions; and energizing parts for energizing the first protrusions relative to the grooves for engaging with the first protrusions.SELECTED DRAWING: Figure 2
Inventors:
TAKAHASHI NOBUAKI
IMAE ICHIRO
IMAE ICHIRO
Application Number:
JP2021052568A
Publication Date:
October 07, 2022
Filing Date:
March 26, 2021
Export Citation:
Assignee:
NIKON CORP
International Classes:
G03B9/02
Attorney, Agent or Firm:
Shuhei Katayama
Toshinari Otake
Toshinari Otake