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A SIMPLE PHOTOMULTIPLIER PHOTOMETER
Author(s) -
Barer R.,
Underwood R. G.
Publication year - 1956
Publication title -
journal of the royal microscopical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0368-3974
DOI - 10.1111/j.1365-2818.1956.tb00453.x
Subject(s) - photomultiplier , photometer , amplifier , photoresistor , optics , sensitivity (control systems) , interference (communication) , computer science , optoelectronics , materials science , physics , electronic engineering , engineering , detector , telecommunications , channel (broadcasting) , cmos
SYNOPSIS The great sensitivity of photomultipliers offers many advantages over photocell‐amplifier systems for the measurement or comparison of low levels of illumination. However, a highly stabilized power supply is generally considered to be essential. Tests have shown that for many purposes such supplies are not necessary. A simple and compact instrument based on a non‐stabilized power supply has been developed. An important feature is the incorporation of a device for ensuring that the same total voltage is applied to the photomultiplier every time a reading is taken. The instrument can thus be regarded as manually stabilized. It has found widespread applications as an exposure meter in phase‐contrast, interference, fluorescence and electron microscopy, and can be used as the basis for many types of instruments in which the measurement of very low light intensities is required.