Image analysis – Histogram processing – For setting a threshold
Patent
1995-02-23
1996-09-03
Healy, Brian
Image analysis
Histogram processing
For setting a threshold
385 11, 324 96, 324 7611, 25022717, 242159, G02B 600, G01R 1900, B65H 1828
Patent
active
055531733
ABSTRACT:
A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.
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patent: 5005952 (1991-04-01), Clark et al.
patent: 5063290 (1991-11-01), Kersey
patent: 5136235 (1992-08-01), Brandle et al.
patent: 5434501 (1995-07-01), Esman et al.
Article entitled "Faraday Effect Sensors: The State of the Art" by G. W. Day and A. H. Rose, National Bureau of Standards, Boulder, CO 80303, SPIE vol. 985, Fiber Optic and Laser Sensors VI (1988) pp. 138-150.
Lutz Dale R.
MacDougall Trevor W.
Taylor William L.
Varner Wayne F.
Wandmacher Robert A.
Griswold Gary L.
Healy Brian
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Musgrove Jack V.
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