Illuminating device having non-absorptive variable transmissivit

Details Illuminating device having non-absorptive variable transmissivit Illuminating device having non-absorptive variable transmissivit

1988-05-05

1990-06-26

Lazarus, Ira S.

Illumination

Light source and modifier

Plural serial lens elements or components

362 31, 362 32, 362327, 362307, 350314, F21V 800

Patent

active

049377167

ABSTRACT:
An illuminating device with a light source having a longitudinally specular light reflector; and, a light escapement part having a substantially non light absorptive cover. The light transmissivity of the cover an any point on the cover varies as a function of the position of that point, such that the luminance of light escaping through the cover at that point has a selected luminous exitance as a function of the position of that point.

REFERENCES:
patent: 3236290 (1966-02-01), Lueder
patent: 3267598 (1966-08-01), Olesen et al.
patent: 4059916 (1977-11-01), Tachihara et al.
patent: 4096550 (1978-06-01), Boller et al.
patent: 4161015 (1979-07-01), Dey et al.
patent: 4524410 (1985-06-01), Kawakatsu et al.
patent: 4642736 (1987-02-01), Masuzawa et al.
patent: 4729068 (1988-03-01), Ohe
patent: 4779166 (1988-10-01), Tanaka et al.
patent: 4794492 (1988-02-01), Vinther

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