Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1993-01-13
1994-06-28
Turner, Samuel A.
Optics: measuring and testing
By particle light scattering
With photocell detection
356128, 356361, 356427, G01B 902
Patent
active
053251725
ABSTRACT:
An optical system is provided with a laser device for emitting a multiplet laser beam with two types of frequencies F1, F2, and a sample rotator on which a reference sample and a test sample containing substances are set for rotating both the test sample and the reference sample to separate the substances contained in the test sample. The test sample and the reference sample are irradiated with the multiplet laser beam one after another to shift the phase of the laser beam. The optical system is further provided with a polarizer for polarizing the multiplet laser beams transmitting through the test sample and the reference sample to produce both a test sample signal with a frequency .DELTA.F=F1-F2 and a reference sample signal with the frequency .DELTA.F, and a signal analyzer for analyzing a phase difference between the sample signals to determine an index of refraction of the test sample. Therefore, the substances containing in the test sample are specified.
REFERENCES:
patent: 3391597 (1968-07-01), Gropper
patent: 4762414 (1993-08-01), Grego
patent: 5251009 (1993-10-01), Bruno
Kataoka Keiji
Koreeda Masakuni
Tachihara Sadamoto
Hitachi Koki Company Limited
Turner Samuel A.
Wolfe Russell C.
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