Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-06-20
1999-08-31
Allen, Stephone
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
385 88, G02B 632, H01S 3097
Patent
active
059456680
ABSTRACT:
An open fiber safety interlock that disables the light transmitter whenever the cable is disconnected or broken. In one embodiment, a cable containing an optical fiber and an electrical conductor is coupled between a local receiver and a remote transmitter. The remote transmitter transmits a light signal to the local receiver via the optical fiber. The power for the remote transmitter is provided to the remote transmitter via the electrical conductor from a local power supply. Disconnecting or breaking the cable results in a loss of power to the transmitter, thereby halting any further light emissions. Broadly speaking, the present invention contemplates a remote module which implements an open fiber safety interlock. The remote module comprises a transmitter for transmitting light through an optical fiber in a cable, where the cable includes an electrical conductor. The transmitter is configured to transmit light when the cable is coupled to the remote module and a voltage is applied to the electrical conductor. The present invention further contemplates an open fiber safety interlock comprising an electrical conductor, a transmitter, and a power supply. The electrical conductor is part of a cable having an optical fiber for transporting a light beam. The transmitter is configured to provide the light beam, and the power supply is coupled to power the transmitter via the electrical conductor.
REFERENCES:
patent: 5113467 (1992-05-01), Peterson et al.
patent: 5329541 (1994-07-01), Brown
Allen Stephone
Kivlin B. Noel
Sun Microsystems Inc.
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