Photometric apparatus employing solid-state imaging device

Details Photometric apparatus employing solid-state imaging device Photometric apparatus employing solid-state imaging device

1989-10-10

1990-12-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250211J, H01J 4014

Patent

active

049773127

ABSTRACT:
A photometric apparatus has a solid-state imaging device whose substrate is formed as an overflow drain, a drive stopping circuit for stopping the driving of the solid-state imaging device with no bias being applied, and a photometric circuit for measuring a photoelectric current which flows from each photodiode into the overflow drain in correspondence with an image of an object. An electrode which is formed to cover the entire substrate surface of the solid-state imaging device may be composed of a plurality of electrode segments which correspond to photometric regions into which are divided one viewfinder field.

REFERENCES:
patent: 4626915 (1986-12-01), Takatsu
patent: 4879470 (1989-11-01), Sugawa et al.

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