Illumination method and apparatus having a plurality of...

Details Illumination method and apparatus having a plurality of... Illumination method and apparatus having a plurality of...

2005-12-19

2008-11-11

Le, Que T (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

Reexamination Certificate

active

07449667

ABSTRACT:
Light from a plurality of light sources is combined in a beam combiner. Photo-sensors are used to sense the intensity of each light source. Signals from the photo-sensors may be used to control the intensity of the light sources. The photo-sensors can be located in the beam combiner or located in the fringe of a collimated beam produced by the beam combiner. The illumination system has application in laser-scanning micro-projectors, for example.

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Closing in on the Perfect Code, Erico Guizzo, IEEE Spectrum, vol. 41, Issue 3, (Mar. 2004), pp. 36-42.

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