Photometric apparatus

Details Photometric apparatus Photometric apparatus

1993-03-01

1993-11-30

Rosenberger, Richard A.

Optics: measuring and testing

Photometers

Photoelectric

354430, G01J 144

Patent

active

052670155

ABSTRACT:
A photometric apparatus includes a charge accumulation type photoelectric transfer unit, a real time monitor unit for monitoring the intensity of incident light in a charge accumulation time of the photoelectric transfer unit, a counting unit for counting a time required for the output of the real time monitor unit to reach a predetermined threshold value, and a memory unit for storing the counted value of the counting unit. A brightness of an object is calculated using the previous counted value stored in the memory unit, the present counted value, the present charge accumulation time, and the A/D converted values of the individual pixel signals obtained on the basis of the present charge accumulation of the photoelectric transfer unit.

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