An optical adaptor member for a magneto-optical - optical current transformer.

摘要

A magneto-optical current measuring device includes a collimating lens arrangement [Fig. 2C, (34, 38)] for focusing a light signal into a parallel beam of light, which beam of light, when polarized is communicated through a Faraday rotator [Fig. 3, (10)] 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 [Fig. 3, (38, 42)] and a spacer lens element [Fig. 3, (34, 46)] 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 [Fig. 2C, (34, 38)] is constructed in the manner of a monolithic configuration and is then secured together with the polarizing element [Fig. 3,(40, 44)] to the Faraday rotator [Fig. 3, (10)] in a manner so as to eliminate all air-to-glass interfaces.