Optocoupler having internal reflection and improved isolation ca

Details Optocoupler having internal reflection and improved isolation ca Optocoupler having internal reflection and improved isolation ca

1977-12-02

1979-12-18

Tokar, M.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

250552, 250239, G02B 2700

Patent

active

041796195

ABSTRACT:
The optocoupling between an optical source and an optical sensor is enhanced while retaining a high dielectric strength by providing a homogeneous medium surrounding the source and the sensor having an inner light transmissive region and an outer light reflective region encapsulated within a substantially opaque body. The homogeneous medium is formed by applying an optically transmissive material to the source and sensor and no more than partially curing said material before applying an optically reflective material which, when fully cured along with the optically transmissive material, does not form an isolation degrading boundary therebetween.

REFERENCES:
patent: 3818451 (1974-06-01), Coleman
patent: 3976877 (1976-08-01), Thillays
patent: 4095116 (1978-06-01), Felkel

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