Document illumination system

Details Document illumination system Document illumination system

1982-03-15

1983-11-08

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 1, 355 8, G03B 2774

Patent

active

044139039

ABSTRACT:
The invention discloses a document illumination assembly which combines the functions of enhanced document illumination and illumination level control. A reflector assembly is modified by introducing a light collecting mechanism within the reflector interior, the light collector being in association with a photosensing means. The reflector performs the normal function of reflecting a portion of the incident light toward the document to enhance illumination efficiency. The reflector also enables the additional function of monitoring the axial illumination of the illumination source by permitting an axial-located radiation band of illumination to enter the reflector body and propagate along the light collecting mechanism where it is sensed by the detector. The detector generates an output signal which can be used to control the output of the illumination source.

REFERENCES:
patent: 3926518 (1975-12-01), Berry et al.
patent: 4017180 (1977-04-01), Yen et al.
patent: 4124294 (1978-11-01), Nakamura
patent: 4124295 (1978-11-01), Gardiner
patent: 4128329 (1978-12-01), Kawano
patent: 4190355 (1980-02-01), Avery et al.
patent: 4251284 (1981-02-01), Oster, Jr.
patent: 4275960 (1981-06-01), Habegger et al.
patent: 4371897 (1983-02-01), Kramer
patent: 4383758 (1983-05-01), Honda et al.

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