Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-10-08
1993-09-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356418, G01J 350
Patent
active
052451798
ABSTRACT:
A compact, high-speed, high resolution, low-cost color filter driver for use in a color optical reader. The image of a document is reflected through a cylindrical color filter assembly rotated by a motor, causing a charge coupled device to be exposed to the light three times (red, blue, green) as the motor was rotated through a half run, and the document scanning portion moves ahead for one step. The color image of the document is reproduced by repeating the aforesaid procedure again and again through the operation of the single color charge coupled device and the cylindrical color filter assembly.
REFERENCES:
patent: 2406318 (1946-08-01), Brace
patent: 3492478 (1970-01-01), Smith
patent: 4804271 (1989-02-01), Cammann
patent: 5184253 (1993-02-01), Hwang
Allen S. B.
Nelms David C.
Umax Data System Inc.
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