Portable photometer

Details Portable photometer Portable photometer

1975-05-21

1977-01-18

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

356 40, G01N 2124

Patent

active

040036626

ABSTRACT:
A photometer for measuring the light permeability of a material for testing is made portable for hand-held operation outside a laboratory for measurements such as determining the proportion of hemoglobin in human blood. It includes a battery power supply that energizes a lamp, an opening for receiving a cuvet for a measurement, and a measuring circuit having a light-sensitive element. An indicator instrument in the measuring circuit indicates zero compensation, and a manually movable wedge filter is in the path of the light beam for adjusting the light passing through the cuvet. A manually operable element effects a zero compensation of the measuring circuit before a test is made, and a viewable scale on a setting member carrying the wedge filter directly displays a test result value from adjustment of the wedge filter during measurement of the material.

REFERENCES:
patent: 2073223 (1937-03-01), Rose
patent: 2188097 (1940-01-01), Thompson
patent: 2621557 (1952-12-01), Kavanagh
patent: 2749796 (1956-06-01), Bauer
patent: 3008370 (1961-11-01), Uribe
patent: 3296922 (1967-01-01), Goldberg

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