Efficient illumination system

Details Efficient illumination system Efficient illumination system

1976-12-20

1978-06-20

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

With temperature or foreign particle control

362 3, 362293, 362298, 350 11, 355 71, G03B 2752

Patent

active

040958817

ABSTRACT:
An illumination system of particular use in document copiers wherein an incandescent lamp which may be of the tungsten-halogen type is located at the focal point of a reflector shaped as a conic section such as elliptical cylinder, directing light rays toward an interference filter for separating the IR radiation and redirecting the IR rays back to the incandescent lamp for heating the lamp. Both cold mirror and hot mirror embodiments of the system are disclosed.

REFERENCES:
patent: 3038372 (1962-06-01), Lessman
patent: 3270194 (1966-08-01), Lee
patent: 3411847 (1968-11-01), Barbieri
patent: 3455622 (1969-07-01), Cooper
patent: 3532424 (1970-10-01), Miles
patent: 3745325 (1973-07-01), Harvey
patent: 3947115 (1976-03-01), Hamaguchi
patent: 3977784 (1976-08-01), Hara
patent: 3982116 (1976-09-01), Sakuma
"Tungsten Halogen Lamps in Photocopy Applications", R. P. Bonazoli & Emery G. Audesse, Sylvania Electric Prod. Inc.
IBM Tech. Disclosure Bulletin, "Copying Low-contrast Masters", G. T. Williams, vol. 15, No. 2, Jul. 1972.

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