Operating radiation sensors to avoid transfer loss

Details Operating radiation sensors to avoid transfer loss Operating radiation sensors to avoid transfer loss

1987-03-04

1988-06-28

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

35821326, 358212, H04N 314

Patent

active

047541539

ABSTRACT:
A method of operating a radiation sensor, such as a charged coupled device array, having a number of radiation sensitive devices and associated transfer buffers. The method comprises (1) illuminating the radiation sensor for a predetermined duration whereby the radiation devices each store a charge relating to the total radiation incident thereon; (2) after the illumination step, transferring the stored charges to the transfer buffers; (3) reading out the charges in the transfer buffers; and, (4) repeating steps 1 to 3 until the transferred charge is substantially constant. Image scanning apparatus incorporating apparatus for performing this method is also described.

REFERENCES:
patent: 4216503 (1980-08-01), Wiggins
patent: 4471388 (1984-09-01), Dischert
patent: 4547676 (1985-09-01), Suzuki et al.
patent: 4600843 (1986-07-01), Kizu et al.
patent: 4682212 (1987-07-01), Inuiya et al.
patent: 4686373 (1987-08-01), Tew et al.
patent: 4698515 (1987-10-01), Sepai
English Abstract of Japanese 59-77774(A) May, 1984.

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