Filter for partially transmitting light

Details Filter for partially transmitting light Filter for partially transmitting light

1976-09-01

1978-01-24

Sacher, Paul A.

350164, 350286, G02B 2700

Patent

active

040701000

ABSTRACT:
A filter comprises a plurality of quadrilateral filter units arranged one after another, each of which is made of two right-angled prisms whereby the incoming light is partially transmitted or shielded by the prisms.

REFERENCES:
patent: 2381614 (1945-08-01), Moller et al.
patent: 2773411 (1956-12-01), Schwede
patent: 3393034 (1968-07-01), Imai
patent: 3590773 (1971-07-01), Ruppert
patent: 3623797 (1971-11-01), Daw
patent: 3636915 (1972-01-01), Ruppert
patent: 3704934 (1972-12-01), Holmes et al.
patent: 3758197 (1973-09-01), Klang et al.

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