Detector in an image read-out system

Details Detector in an image read-out system Detector in an image read-out system

1982-09-17

1985-10-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250572, G02B 514

Patent

active

045462500

ABSTRACT:
A photo-sensor, such as a photo-diode, is applied to the converging area of a flat type light transmission unit in an image read-out system, thereby intercepting a part of the scan light which falls on and travels through the light transmission unit after being reflected from an image-bearing sheet. The output signal from the photo-sensor can be advantageously used to detect arrival of the sheet edge at the scanning station, any scratches on the sheet and other operating conditions as required.

REFERENCES:
patent: 3096431 (1963-07-01), Schmidlin
patent: 4289406 (1981-09-01), Maddox
patent: 4368384 (1983-01-01), Kato et al.
patent: 4410799 (1983-10-01), Okamoto

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