Electricity: measuring and testing – Magnetic – Magnetometers
Patent
1991-08-15
1994-10-11
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Magnetometers
359280, 29595, G01R 33032, G01R 33022, G01R 300, G02F 109
Patent
active
053550846
ABSTRACT:
An optical magnetic-field sensor includes a base fixed relative to distal ends of optical fibers inserted in the sensor, optical parts and an optical element for transmitting optical signals between the distal ends of the optical fibers. The optical signals are collimated between the optical parts and the distal ends of the optical fibers. The optical magnetic-field sensor further includes spherical lenses optically aligned with the distal ends of the optical fibers for collimating the optical signals, and synthetic resin members filled in clearances between the distal ends of the optical fibers and the spherical lenses, respectively. With the above arrangement, it is possible to effect the alignment of optical axes of the optical fibers and the spherical lenses easily with high accuracy in a short period of time.
REFERENCES:
patent: 4327963 (1982-05-01), Khoe et al.
patent: 4962990 (1990-10-01), Matsuzawa et al.
Journal of Lightwave Technology, "Fiber-Optic Current and Voltage Sensors Using a Bi.sub.12 GeO.sub.20 Single Crystal", vol. LT-1, No. 1, Mar. 1983, pp. 93-97.
Asai Yuji
Okajima Hisakazu
NGK Insulators Ltd.
Snow Walter E.
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