System for verifying the calibration of a turbidimeter

Details System for verifying the calibration of a turbidimeter System for verifying the calibration of a turbidimeter

1998-06-01

1999-06-15

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

3562432, 356338, G01N 2100, G01J 102

Patent

active

059127376

ABSTRACT:
A system is described for verifying the calibration of a turbidimeter having a light source and a detector for scattered light. A first polarizer is positioned in the path of the light beam, and a second polarizer is positioned between the first polarizer and the detector. The first polarizer linearly polarizes the light beam and the second polarizer restricts the amount of light passing through it to reach the detector.

REFERENCES:
patent: 3177761 (1965-04-01), Redner
patent: 3627431 (1971-12-01), Komarniski
patent: 3653767 (1972-04-01), Liskowitz
patent: 3790289 (1974-02-01), Schmidt
patent: 3918817 (1975-11-01), Posgate
patent: 5250186 (1993-10-01), Dollinger et al.

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