Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1983-08-01
1987-03-24
McGraw, Vincent P.
Optics: measuring and testing
By particle light scattering
With photocell detection
250227, 356351, G01B 902
Patent
active
046521291
ABSTRACT:
The detector comprises an electro-optical section for the signal analysis, a transmission fibre-optic, a fibre-optic coupling of high immunity to environmental noise, and a fibre-optic sensor terminating in a reflecting element. It can be provided in either homodyne or heterodyne version (phase or frequency modulation). This latter version has the advantage of detecting phase modulations exceeding 2.pi. radians. Both the versions have the advantage of enabling measurements to be made which are not influenced by environmental disturbances affecting the transmission fibre-optic.
REFERENCES:
patent: 4420260 (1983-12-01), Martinelli
Cise - Centro Informazioni Studi Esperienze S.p.A.
Koren Matthew W.
McGraw Vincent P.
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