Colour cross-fading system for a luminaire

Details Colour cross-fading system for a luminaire Colour cross-fading system for a luminaire

1993-04-23

1995-06-20

Lazarus, Ira S.

Illumination

Light source and modifier

Including selected wavelength modifier

362268, 362283, 359889, 359890, F21V 900

Patent

active

054265762

ABSTRACT:
A color cross-fading system for a luminaire includes two filter disks or strips each provided with a multi-layer filter coating to provide a dichroic filter effect. In each case the thickness of the coating layers varies continuous along a gradient axis of the filter disk or strips. One disk acts predominantly as a long wave pass filter and the other act predominantly as a short wave pass filter, but each disk has an essentially "complex" characteristic enabling a very wide range of different colors to be obtained by cumulative subtractive filtering, by varying the positions of the two disks or strips relative to an optical axis.

REFERENCES:
patent: 4602321 (1986-07-01), Bornhorst
patent: 4800474 (1989-01-01), Bornhorst
patent: 4984143 (1991-01-01), Richardson
patent: 5111343 (1992-05-01), Harrigan
patent: 5126886 (1992-06-01), Richardson et al.

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