Image scanner

Details Image scanner Image scanner

1987-07-27

1988-07-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 41, 358 50, 358 55, 358 75, 358205, 35821328, 358225, 358294, H04N 306

Patent

active

047558768

ABSTRACT:
An image scanner is disclosed which utilizes a dither plate to steer an image onto a sparsely-populated image sensor in order to effectively fill in the gaps between photosites. A DC motor, which is responsive to a servo control, is used to precisely position the dither plate relative to the image sensor. In order to provide a scanner which can scan at a rate compatible with a high throughput, a low inertia, low inductance motor is used to position the dither plate. The position of a dither plate is sensed by a linear proximity sensor which is part of a closed-loop servo control for the motor.

REFERENCES:
patent: 3241015 (1966-03-01), Allen
patent: 3655954 (1972-04-01), Speth
patent: 4139811 (1979-02-01), Klinger
patent: 4284942 (1981-08-01), Bigley et al.
patent: 4333112 (1982-06-01), Matsumoto
patent: 4507594 (1985-03-01), Takemoto
patent: 4638371 (1987-01-01), Milch
patent: 4695722 (1987-09-01), Motooka
patent: 4714830 (1987-12-01), Usui

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