Filterless chromatically variable light source

Details Filterless chromatically variable light source Filterless chromatically variable light source

1995-12-18

1997-06-03

Ullah, Akm E.

Optical waveguides

With optical coupler

Input/output coupler

G02B 632

Patent

active

056363036

ABSTRACT:
A chromatically variable light source includes a plurality of light emitting diodes which generate substantially monochromatic light at different wavelengths. The light source includes circuitry for selectively energizing one or more of the light emitting diodes and for controlling the intensity of the generated light. The light generated by the light emitting diodes is combined in a single light pipe and delivered to an output port for use.

REFERENCES:
patent: 4401694 (1983-08-01), Quick et al.
patent: 4643519 (1987-02-01), Bussard et al.
patent: 5074641 (1991-12-01), Nakai et al.
patent: 5077814 (1991-12-01), Shigematsu et al.
patent: 5226105 (1993-07-01), Myers
patent: 5239609 (1993-08-01), Auteri
patent: 5325453 (1994-06-01), Drissler
patent: 5394492 (1995-02-01), Hwang

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