Fiber-optic reed switch

Details Fiber-optic reed switch Fiber-optic reed switch

G - Physics

02

F

26/197, 88/97.4

G02F 1/313 (2006.01) G02B 6/35 (2006.01)

Patent

CA 1309285

ABSTRACT OF THE DISCLOSURE A magnetically responsive reed switch assembly having one or two cantilevered reed members arranged to close and open a gap responsive to respective levels of magnetic exposure, supports two optical fiber members in end-to-end closely spaced confrontation with the common axis alignment or misalignment of the fibers being a function of the relative closed or opened gap condition. A convenient method of fabrication involves mounting opposing cantilevered reed members on a substrate which is bent to bring the reed members closer together longitudinally. While so bent, a gap closing magnetic field is generated and a continuous length of optical fiber is bonded to the flat aligned surfaces of the reed assembly. The fiber is scored, broken at scoring, and s?ress and magnetic field is relieved, whereupon fiber ends shift laterally to produce open circuit condition.

588624

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