Fiber optics electro-mechanical light switch

Details Fiber optics electro-mechanical light switch Fiber optics electro-mechanical light switch

1976-08-27

1977-11-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

350 96C, G02B 514

Patent

active

040577198

ABSTRACT:
An electro-mechanically actuated light switch is provided for transferring ight energy into or out of a fiber optic light transmission path. Liquid material contained within the switch provides a continuity between two fiber optic terminals in the fiber optic light transmission path. The liquid material is chosen to have an index of refraction higher than the material which contains it, so that substantially total internal reflection is sustained along the optical axis of the fiber optic light transmission path. A transparent member is movably mounted in a port in the switch and resiliently supported for extension into the liquid material. An electromagnetic-solenoid arrangement is adapted to extend an angularly disposed reflective end of the transparent member into the liquid material for redirecting light energy which it intercepts. Such redirected light energy in the form of light intercepted in the optical path may be detected by a suitable sensor; alternatively light signals from a suitable source such as a light emitting diode may be introduced into the transparent member and reflected to propagate along the optical path.

REFERENCES:
patent: 3676689 (1972-07-01), Knepper
patent: 3856127 (1974-12-01), Halfon et al.

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