Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1995-01-13
1996-08-06
Gonzalez, Frank
Optics: measuring and testing
By particle light scattering
With photocell detection
G01B 902
Patent
active
055439144
ABSTRACT:
An improved interferometric measuring system that includes a system for measuring a phase difference between two coherent beams oscillating at substantially the same frequency, and including a phase modulator disposed into optical communication with one of the coherent beams and being adapted to generate a phase modulated beam signal. A beam combiner combines the phase modulated beam signal with the second one of the coherent beams to generate a combined beam signal. A detector element measures the intensity of the combined beam signal and a date processor analyzes the intensity to determine from the harmonic components of the combined beam signal the phase difference between the two coherent beams.
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Henshaw Philip D.
Lis Steven A.
Eisenberg Jason D.
Engellenner Thomas J.
Gonzalez Frank
Kelly Edward J.
Sparta, Inc.
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