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Zurich Instruments AG - Lock-In Amplifiers 4/24 LB
Photonics Dictionary

polarization photometer

A photometer having a pair of Nicol prisms introduced into the beam from the brighter of two sources to be compared. Turning one of these polarizers reduces the beam to equality with the beam of the other source. In this way, the illuminations or luminous flux densities from the two sources may be compared.
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