Method and apparatus for checking continuity of optic transmissi

Details Method and apparatus for checking continuity of optic transmissi Method and apparatus for checking continuity of optic transmissi

1989-04-28

1991-02-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Signal isolator

455617, 356 731, G02B 2700

Patent

active

049946757

ABSTRACT:
An apparatus for checking continuity of fiber optic links from source to receiver before enabling the source delivers full power so as to thereby prevent eye damage to personnel and provide a supervisory signal to the system user that the link elements are intact and functioning. The apparatus includes a transmitter, a receiver and a detector for detecting that an optical transmission between the transmitter and receiver can be effected.

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patent: 4393518 (1983-07-01), Briley
patent: 4596049 (1986-06-01), Rizzotti, III
patent: 4637072 (1987-01-01), Hellstrom
patent: 4677982 (1987-07-01), LLinas et al.
patent: 4691384 (1987-09-01), Jobe
patent: 4710977 (1987-12-01), Lemelson
patent: 4817204 (1989-03-01), Jannelli et al.
patent: 4833668 (1989-05-01), Rowley et al.

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