Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-12-04
1987-04-28
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
358213, 358293, 250235, H01J 4014
Patent
active
046617132
ABSTRACT:
The device includes at least two diode arrays which contain some diodes which are defective. The defective diodes are compensated in that the respective diodes of the two arrays are aligned in pairs along the scanning direction, with each of the pairs containing at least one good diode. The device also comprises a programmed memory for controlling two switches and for accomplishing a winding or serpentine readout of the arrays. The device is well adapted for landscape scanning.
REFERENCES:
patent: 4464754 (1984-08-01), Stewart et al.
patent: 4481539 (1984-11-01), Meise et al.
IBM Technical Disclosure Bulletin, vol. 23, No. 12, May 1981, New York (US); W. J. Craig: "Redundancy for Document Scanners", pp. 5288-5289, *en entier*.
WO-A-8 203 146 (RCA Corp.), *p. 2, ligne 5-p. 4, linge 6*.
Journal of Physics; Scientific Instruments, vol. 8, No. 5, 1975; P. W. Fry: "Silicon Photodiode Arrays", pp. 337-349.
Besson Jean G.
Royer Michel
Salaville Andre A.
Sirieix Michel B.
Oen William L.
S.A.T.
Westin Edward P.
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