Variable transmission prismatic refractors

Details Variable transmission prismatic refractors Variable transmission prismatic refractors

1976-04-12

1978-10-03

Braun, Fred L.

Illumination

Light modifier

Refractor

362326, 362337, F21V 502

Patent

active

041187636

ABSTRACT:
Luminaire globe has external prisms formed to provide controlled amount of emitted light in various portions of the globe. The prism comprises a combination of right angle reflecting surfaces and light transmitting surfaces contoured to provide the desired ratio of transmitted to internally reflected light.

REFERENCES:
patent: 124016 (1872-02-01), Schneider
patent: 1036527 (1912-08-01), Hewitt
patent: 1065167 (1913-06-01), Myers
patent: 2175067 (1939-10-01), Rolph
patent: 3163367 (1964-12-01), Bodian
patent: 3735124 (1973-05-01), Stahlhut

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