Adjustable polarized filters for cameras

Details Adjustable polarized filters for cameras Adjustable polarized filters for cameras

1976-09-20

1977-12-13

Gonzales, John

350147, 350317, 354 76, G02B 522, G02B 530, G03B 1100

Patent

active

040632660

ABSTRACT:
Filter case rotatably carries two filter retainers each with a linearly polarized filter, each at the same angular position. A perforated belt engages around the sprocket teeth on the filter retainers so that the two filters are rotated together. Filter case is removably attached to the camera body.

REFERENCES:
patent: 2142657 (1939-01-01), Sauer et al.
patent: 2169688 (1939-08-01), Frotschner
patent: 2184015 (1939-12-01), McFarlane
patent: 2190718 (1940-02-01), Kuppenbender
patent: 2695553 (1954-11-01), Tate

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