Light intercepting apparatus of lens barrel

Details Light intercepting apparatus of lens barrel Light intercepting apparatus of lens barrel

1993-12-01

1995-09-12

Shafer, Ricky D.

Optical: systems and elements

Glare or unwanted light reduction

359823, 35419512, G02B 2700

Patent

active

054502390

ABSTRACT:
A light intercepting apparatus of a lens barrel has a pair of lens frames which support a pair of lens groups, with the lens groups being movable with respect to one another in an optical axis direction. The apparatus further includes a light intercepting portion which isolates an optical path between the lens groups from external light. The light intercepting portion includes a pair of annular light intercepting members which are supported by the pair of lens frames in a manner such that the pair of annular light intercepting members are movable with respect to each other in the optical axis direction. The pair of annular light intercepting members include a pair of engaging portions which define a latch portion of the light intercepting apparatus and which prevent motion of the annular light intercepting members beyond a maximum extended position of the pair of annular light intercepting members.

REFERENCES:
patent: 4911542 (1990-03-01), Nishio et al.
patent: 5033819 (1991-07-01), Tanaka
patent: 5034762 (1991-07-01), Kohmoto
patent: 5276552 (1994-01-01), Kohmoto et al.
patent: 5343331 (1994-08-01), Kohmoto et al.
patent: 5365373 (1994-11-01), Tanaka

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