Linear integrating cavity light collector

Details Linear integrating cavity light collector Linear integrating cavity light collector

1980-09-02

1982-03-23

Britton, Howard

Facsimile and static presentation processing

Facsimile

Recording apparatus

250228, 358293, H04N 124

Patent

active

043216307

ABSTRACT:
A light collector for collecting light reflected from an information bearing surface and scanned by a flying spot scanner. The collector comprises an integrating cavity having at least one photodetector therein with at least one slit like aperture for receiving light reflected from the information bearing surface. In a first embodiment, a scan beam passes through the cavity via a first and second slit to scan essentially normal to the surface. Reflected light is directed back into the cavity and is apodized to improve signal level uniformity at the photodetector. The cavity construction is also designed to provide start and end of scan signals.

REFERENCES:
patent: 2945958 (1960-07-01), Morris
patent: 3455637 (1969-07-01), Howard
patent: 3561846 (1971-02-01), Kingsland
patent: 3603730 (1971-09-01), Weigl et al.
patent: 3681527 (1972-08-01), Nishiyama et al.
patent: 3845239 (1974-10-01), Granzow et al.
patent: 3980893 (1976-09-01), Merlen
patent: 3987301 (1976-10-01), O'Connor
patent: 4001581 (1977-01-01), Murata
patent: 4012585 (1977-03-01), Chen
patent: 4015081 (1977-03-01), Starkweather
patent: 4180702 (1979-12-01), Sick et al.

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