PHOTOELECTRIC LIGHT MEASURING DEVICE

In a photoelectric light measuring device, a photoelectric transducer, such as photoconductive cell, is connected in series with a transistor, so that the logarithm of incident light on the cell can be graduated uniformly on an ordinary ammeter having a linear current-deflection characteristic, ther...

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Bibliographic Details
Main Author NANBA Y,JA
Format Patent
LanguageEnglish
Published 27.03.1973
Subjects
COLORIMETRY
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:In a photoelectric light measuring device, a photoelectric transducer, such as photoconductive cell, is connected in series with a transistor, so that the logarithm of incident light on the cell can be graduated uniformly on an ordinary ammeter having a linear current-deflection characteristic, thereby enabling easy reading and affording a simple mechanism in a photometer or an automatic shutter speed control system, without adverse temperature dependency of the indication.
Bibliography:Application Number: USD3723014