Title:
LENS BARREL AND OPTICAL INSTRUMENT
Document Type and Number:
Japanese Patent JP2016045283
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lens barrel that effectively prevent a light leakage to an image pick-up sensor although an optical sensor is employed.SOLUTION: A lens barrel according to the present invention comprises: a focus lens 1; a lens holder 2; a focus base 10 that holds the lens holder 2 movably in an optical axis direction; an optical sensor 14a that is held by the focus base 10; and a reflection scale 3. Then, the focus base 10 faces at least a light emitting part 14b of the optical sensor 14a, and has a first plane 10c that blocks the focus lens 1 and the reflection scale 3, and a light shield wall 10b that is composed of a second plane 10d bonding the focus base 10 and a first plane 10c. Further, the lens holder 2 according to the present invention is configured to have a scale holding part 2c extending to the reflection scale 3 across the first plane 10c.SELECTED DRAWING: Figure 2
Inventors:
OGAWA TOSHIHIRO
Application Number:
JP2014168044A
Publication Date:
April 04, 2016
Filing Date:
August 21, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/02; G02B7/04
Attorney, Agent or Firm:
Yukio Takanashi
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