Filter holder

Details Filter holder Filter holder

1992-05-19

1993-07-13

Ben, Loha

Optical: systems and elements

Absorption filter

With support or frame

354286, G02B 522

Patent

active

052279251

ABSTRACT:
A filter holder according to the present invention is provided with a frame installed in a freely mountable and detachable manner in a lens barrel. A female screw formed on one side of the frame in the direction extending along the optical axis of the lens barrel and set by screwing in a male screw of a screw type filter. A plate spring installed on the other side of the frame along the extending direction of the optical axis of the lens barrel mentioned above, is capable of holding a film-shaped filter therein, between the other side surface of the frame and the plate spring.

REFERENCES:
patent: 3758200 (1973-09-01), Saito
patent: 4050791 (1977-09-01), Watanabe
patent: 4302078 (1981-11-01), Stravitz
patent: 4384767 (1983-05-01), Kawai
patent: 4533212 (1985-08-01), Shimizu
patent: 4536057 (1985-08-01), Sumi et al.
patent: 4922280 (1990-05-01), Koshino et al.

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