Overhead document scanner lighting and scanning apparatus

Details Overhead document scanner lighting and scanning apparatus Overhead document scanner lighting and scanning apparatus

1987-06-01

1988-04-12

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821313, 358293, H04N 1028

Patent

active

047378573

ABSTRACT:
An overhead optical scanner is disclosed which uses commerical 60 Hz AC powered fluorescent lighting apparatus to illuminate the scanned objects. The image sensor of the scanner operates at a line scan rate which is in sync with the 60 Hz rate. The image sensor integrates the variations in illumination intensity received from the object over one complete 60 Hz cycle, thereby producing an electrical signal which is characteristic of a uniformly illuminated object.

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patent: 4250526 (1981-02-01), Fuwa et al.
patent: 4352128 (1982-09-01), Ohori et al.
patent: 4636081 (1987-01-01), Saitoh
patent: 4639608 (1987-01-01), Kuroda
patent: 4642679 (1987-02-01), Nagano
patent: 4652913 (1987-03-01), Saitoh
patent: 4658289 (1987-04-01), Nagano
patent: 4658303 (1987-04-01), Nagano
patent: 4670779 (1987-06-01), Nagano
patent: 4691228 (1987-09-01), Nagano

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