Absorbance measuring photometer

Details Absorbance measuring photometer Absorbance measuring photometer

1976-07-08

1977-10-11

Evans, F. L.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356184, 356206, G01J 350

Patent

active

040532364

ABSTRACT:
An absorbance measuring photometer, for measuring the absorbance of a sample in a sample cell, in which light of preselected wavelengths from one of two alternately utilizable sources of different wavelengths is formed into a beam and the etendu of the beam defined. The beam is then split into two separate beams one of which is directed through the sample cell onto a first detector and the other of which is passed directly onto a reference detector. The beam is so directed though the sample cell that it does not touch the cell walls and both beams are imaged on their respective detectors so as to be wholly within the photosensitive area thereof.

REFERENCES:
patent: 2577814 (1951-12-01), Saunderson et al.
patent: 2879393 (1959-03-01), Cary et al.
patent: 3022704 (1962-02-01), Cary
patent: 3542515 (1970-11-01), Scott
patent: 3725204 (1973-04-01), Marshall et al.
patent: 3737234 (1973-06-01), Shibata et al.
patent: 3832062 (1974-08-01), Van den Bosch

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