Photo-electric conversion device with accumulation time control

Details Photo-electric conversion device with accumulation time control Photo-electric conversion device with accumulation time control

1984-03-27

1985-10-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358213, H01J 4014

Patent

active

045448485

ABSTRACT:
A photo-electric conversion device is provided with a light receiving array and circuits serving to scan the same. A light receiving device separate from the array and connected in parallel therewith is used as a part of a control device for controlling the accumulation time of the array. A saturation detection circuit may be arranged to receive the output of the array and to vary the accumulation time by a suitable factor when array saturation occurs. The conversion device may also be provided with means for compensating for leak currents in the conversion block, so as to facilitate higher linearity at low illumination intensities.

REFERENCES:
patent: 4293877 (1981-10-01), Tsunekawa et al.
patent: 4338514 (1982-07-01), Bixby

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