Title:
LENS RETENTION DEVICE
Document Type and Number:
Japanese Patent JP2013037305
Kind Code:
A
Abstract:
To provide a lens retention diaphragm capable of reducing lens lifting effect due to wrinkle, breakage or elasticity of a marginal washer, and also reducing effect of moment stress on the lens at crimping.
A lens retainer comprises: a sheet member having a plurality of notches on an outer circumference; two lenses pressed to each other and holding the sheet member therebetween; and a lens holding member for holding the two lenses and the sheet member. An inner diameter of the notches on the sheet member is located inside, in comparison with a diameter of the pressed two lenses.
Inventors:
NAKAYAMA TAKEYA
Application Number:
JP2011175503A
Publication Date:
February 21, 2013
Filing Date:
August 11, 2011
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/10; G02B7/02; G03B9/02
Attorney, Agent or Firm:
Yukio Takanashi