Integrating light source utilizing a fluorescing reflector for i

Details Integrating light source utilizing a fluorescing reflector for i Integrating light source utilizing a fluorescing reflector for i

1990-12-24

1992-01-07

Lazarus, Ira S.

Illumination

Light source or light source support and luminescent material

362296, 362310, 358491, F21V 916

Patent

active

050796780

ABSTRACT:
An integrating cavity 20 has a diffusely-reflecting wall 22 that includes a fluorescent material for absorbing radiation in an unusable region of the electromagnetic spectrum and emitting radiation in response thereto in a usable region of the spectrum. A light source 10 provides radiation in both regions, which enters the cavity 20 through an input port 18, reflects from the wall 22 and exits through an output slit 24 toward an image plane 26. At least some of the unusable radiation is absorbed by the fluorescent material coating the wall 22 and reemitted as usable radiation toward the image plane 26.

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