Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Patent
1995-10-06
1997-07-15
Lazarus, Ira S.
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
362293, 362373, 16510413, 16510421, 16510428, F21V 2900
Patent
active
056476620
ABSTRACT:
Apparatus for cooling a light beam used to project an image on a projection surface. The apparatus includes a light beam source and a gas cooling circuit. A cooling chamber is connected to conduct gas through the circuit. An image projection device is mounted in the chamber. The chamber has a thermally protected environment. A driving device is provided in the circuit. A heat conducting gas is moved by the driving device to circulate within the circuit. The thermally protected environment may include an atmosphere of atomized, heat conducting fluid. A heat extracting filter may be mounted in the light beam adjacent the cooling chamber.
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patent: 3193001 (1965-07-01), Meckler
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patent: 4843529 (1989-06-01), Izenour
patent: 4890208 (1989-12-01), Izenour
patent: 5147130 (1992-09-01), Watanuli
patent: 5282121 (1994-01-01), Bornhorst et al.
patent: 5497573 (1996-03-01), Stadjuhar
Belliveau Richard S.
Ziegler Byron J.
Lazarus Ira S.
Sember Thomas M.
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