Dual beam photometer with rotating filter plate

Details Dual beam photometer with rotating filter plate Dual beam photometer with rotating filter plate

1980-02-04

1981-09-29

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

With sequential comparison of sample and standard

356418, 356447, G01N 2127, G01J 350

Patent

active

042919851

ABSTRACT:
A photometer comprising a light source, a rotating plate provided with a plurality of filter means having different wave lengths, a reference plate and a sample means, said rotating plate disposed between said light source and said reference plate and sample means, and a half-mirror and a reflection plate located between said light source and said rotating plate, said half-mirror and reflection plate being disposed so as to form a first light passage adapted to extend to the reference plate, and a second light passage adapted to extend to the sample means, whereby alternate radiation through one of said filter means against the reference plate and the sample means is made by the rotation of said rotary plate.

REFERENCES:
patent: 4029419 (1977-06-01), Schumann, Jr. et al.

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