Dimmer for fiber optic light transmission systems

Details Dimmer for fiber optic light transmission systems Dimmer for fiber optic light transmission systems

1990-03-09

1991-04-09

Yeung, James C.

Illumination

Revolving

362277, 362293, 362307, 362319, 362321, 362322, F21V 704

Patent

active

050069659

ABSTRACT:
A dimmer for adjustably attenuating light to a fiber optic bundle. An opaque vane has a movement axis with a band on each side. One band has a substantially opaque portion which blocks about 50% of the light of a spot directed against the vane, and an opaque portion for passing about 50%. The other band has transmission slots interspaced between opaque bars, proportioned and arranged to pass varying amounts of light, all as a function of the position of the vane. The light passed by the bands is additive.

REFERENCES:
patent: 4233650 (1980-11-01), Hagner et al.
patent: 4425599 (1984-01-01), Rieder et al.
patent: 4860172 (1989-08-01), Schlager

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