Image read-out apparatus with image signal adding

Details Image read-out apparatus with image signal adding Image read-out apparatus with image signal adding

1988-10-20

1990-04-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358496, H01J 314

Patent

active

049163108

ABSTRACT:
In an image read-out method, image signals are obtained by scanning a material-to-be-scanned, which carries an image recording thereon and which is conveyed in a sub-scanning direction, by a light beam deflected by a rotating polygon mirror in a main scanning direction approximately normal to the sub-scanning direction, and photoelectrically detecting light, which carries the image and which is obtained from a portion scanned by the light beam, by a photodetector. The image signals each obtained in each of main scanning steps in a number obtained by a single turn of the rotating polygon mirror or turns thereof in a number equal to integral multiples of one are addition-processed to obtain an image signal over a single main scanning line.

REFERENCES:
patent: 4288820 (1981-09-01), Minamibashi et al.
patent: 4313138 (1982-01-01), Kanda
patent: 4791304 (1988-12-01), Iida

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