Double multichromatic photometer with a single light-source and

Details Double multichromatic photometer with a single light-source and Double multichromatic photometer with a single light-source and

1984-05-31

1986-09-30

McGraw, Vincent P.

Optics: measuring and testing

By shade or color

With color transmitting filter

250575, 356434, G01J 351, G01N 2131

Patent

active

046144340

ABSTRACT:
The object of this invention is a double multichromatic photometer including a single light-source and a single detector, particularly for the determination of chemical and clinical analyses, in which the photometer light comes from a single light-source which radiates along three distinct optical paths that converge onto a single detector; two of the optical paths are the first and the second measuring channels, which are alternatively excluded whereas the third optical path is for reference purposes. An optical collimation assembly and a measurement cuvette are inserted into each of the two measuring optical paths or channels. Within said three optical paths is inserted a rotating drum, said drum holds a number of interference filters, allowing the third reference optical path to pass freely, and inserts one filter at a time into one or the other of the two measuring optical paths. Moreover, a rotating shutter controlled by a motor is also provided for the reference optical path, said shutter coordinately rotates with the filter-bearing drum. An opto-electronic assembly, including printed circuit boards and optical couplers are provided for the selection of filters and the measuring channel.

REFERENCES:
patent: 2904687 (1959-09-01), Sobcov et al.
patent: 3292484 (1966-12-01), Clay
patent: 3690772 (1972-09-01), Endl
patent: 3941487 (1976-03-01), Ehret et al.

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