Filter apparatus for camera

Details Filter apparatus for camera Filter apparatus for camera

1987-02-12

1992-01-07

Mathews, A. A.

Optical: systems and elements

Prism

With reflecting surface

354202, 354288, 359889, G03B 1700

Patent

active

050795767

ABSTRACT:
This invention discloses an improvement of a filter apparatus for cameras and particularly discloses various arrangements for improving the filter apparatus for cameras in which, for example, an operating means for placing a filter in and taking it out of the optical path is provided so that the operating means automatically removes the filter from the optical path by stopping the operations of filter photography at the completion thereof. Thus, a photograph can be prevented from mistakenly being taken with the filter still in place in the optical path, and protective means for preventing damage of the filter surface is provided on the filter.

REFERENCES:
patent: 3314349 (1967-04-01), Koeber
patent: 3395630 (1968-08-01), Haufler et al.
patent: 3427943 (1969-02-01), Leibundgut
patent: 3602583 (1971-08-01), Winkler
patent: 3661458 (1972-05-01), Noemer et al.
patent: 3868714 (1975-02-01), Muryoi
patent: 4571043 (1986-02-01), Kobayashi et al.
patent: 4586802 (1986-05-01), Nagano et al.
patent: 4597643 (1986-07-01), Podvin et al.
patent: 4681418 (1987-07-01), Kodaira

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