Optical interface for a magneto-optical current transducer

Details Optical interface for a magneto-optical current transducer Optical interface for a magneto-optical current transducer

1988-02-05

1989-03-14

Corbin, John

350394, 350443, G02B 1318, G02B 1700, G02B 530

Patent

active

048120251

ABSTRACT:
A magneto-optical current measuring device includes a collimating lens arrangement for focusing a light signal into a parallel beam of light, which beam of light, when polarized is communicated through a Faraday rotator which is disposed in surrounding proximity to the transmission line in which it is desired to measure the current flow. The collimating lens element is formed of a segment of a parabolic lens and a spacer lens element which has a flat surface formed by an edge opposite the parabolic surface, this flat surface extending to the focal length of the parabolic surface. The collimating lens element is constructed in the manner of a monolithic configuration and is then secured together with the polarizing element to the Faraday rotator in a manner so as to eliminate all air-to-glass interfaces.

REFERENCES:
patent: 4050775 (1977-09-01), Scholeen
patent: 4219867 (1980-08-01), Zehender
patent: 4456783 (1984-06-01), Baker
patent: 4770514 (1988-09-01), Silverglate

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