Optical waveguides – With optical coupler – Movable coupler
Patent
1998-04-16
2000-10-03
Lee, John D.
Optical waveguides
With optical coupler
Movable coupler
385 26, G02B 636
Patent
active
061284262
ABSTRACT:
An improved optical rotary joint is achieved by transmitting information in the form of an optical signal from a part of the de-spun portion outside the rotational axis to the spun portion, or vice versa, thereby creating a continuous communication path 360.degree. about the rotational axis. The optical rotary joint includes either a plurality of transmitters on one portion and a detector on the other portion, or a transmitter on one portion and a plurality of detectors on the other portion. In the former, the transmitters are controlled such that only the transmitters transmitting optical signals that will be detected by the detector at a given point in the rotation are activated and the remaining transmitters are deactivated. In the latter, the detectors are controlled such that only the detectors detecting the optical signal transmitter by the transmitter at a given point in the rotation are activated and the remaining detectors are deactivated.
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Grunebach Georgann S.
Hughes Electronics Corporation
Lee John D.
Sales M. W.
Stahl Michael J.
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