Optical waveguides – Optical fiber waveguide with cladding – Utilizing nonsolid core or cladding
Patent
1993-07-28
1995-04-18
Bovernick, Rodney B.
Optical waveguides
Optical fiber waveguide with cladding
Utilizing nonsolid core or cladding
385146, 385 43, G02B 620
Patent
active
054085632
ABSTRACT:
An optocoupler for isolating a high voltage from a low voltage comprising: an elongated light transmissive rod mounted inside a cavity of a housing, the cavity being filled with a fluid surrounding and in contact with an outside wall surface of the rod; a light emitter mounted at one end of the rod, the light emitter receiving a current input and emitting light in response to the input; a light detector mounted at an opposing end of the rod, the light detector having a detection surface receiving light emitted from the emitter and generating a current output signal in response to the received light; the emitter and detector being mounted such that light emitted from the emitter travels through the rod and is directed toward the detector; a portion of the light emitted from the emitter traveling in a path into impingement with the outside wall surface of the rod; the rod having a first refractive index and the fluid having a second refractive index; the outside wall surface of the rod having a selected contour; the refractive indexes of the rod and the fluid and the contour of the outside wall surface of the rod being selected such that substantially all of the portion of light emitted from the emitter which travels in a path toward impingement with the outside wall surface is reflected one or more times at the wall surface and through the rod toward impingement with the detection surface of the detector.
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patent: 5271079 (1993-12-01), Levinson
Beland Robert
Corbeil Pierre
Bovernick Rodney B.
Sunghavi Hemang
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