Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1991-01-25
1993-06-29
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250226, 359571, H01J 4014
Patent
active
052237036
ABSTRACT:
An image reader comprises a monolithic 3-line sensor having three one-dimension sensor arrays such as solid-state imaging devices arranged on one substrate with each array being spaced by a predetermined distance along a direction perpendicular to the array direction, a focusing optical system for focusing an image of an object onto the sensor, and a one-dimension blazed diffraction grating arranged in a light path between the focusing optical system and the sensor, closer to the sensor than to an exit pupil of the focusing optical system for spectroscopically separating a light from one point on the object by a diffraction effect to color-decompose it into three colors perpendicularly to the array and directing the color-decomposed lights to the corresponding sensor arrays. Distances from a center sensor array of the 3-line sensor to two other sensor lines are different from each other.
REFERENCES:
patent: 4277138 (1981-07-01), Dammann
patent: 4554460 (1986-11-01), Klein
patent: 4650988 (1987-03-01), Suzuki et al.
patent: 4963464 (1990-10-01), Setani
patent: 4991030 (1991-02-01), Sato et al.
patent: 4998806 (1991-03-01), Tsuji et al.
Canon Kabushiki Kaisha
Nelms David C.
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