Method and apparatus for measuring the attenuation of an optical

Details Method and apparatus for measuring the attenuation of an optical Method and apparatus for measuring the attenuation of an optical

1991-10-28

1993-02-23

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 731, H01J 516

Patent

active

051893002

ABSTRACT:
A method and apparatus for measuring the attenuation of optical medium utilizing a transmitter and a receiver arranged on each side of the medium. In the method, two-measurement series are acquired in succession and the reception signals thereof are derived both from the series using reception signals from both the right and left-hand transmitters on a first receiver, while the second receiver is uncoupled. Then, a second series is performed with the second receiver coupled in and the first receiver uncoupled.

REFERENCES:
patent: 4183666 (1980-01-01), Tahara et al.
patent: 4652123 (1987-03-01), Neumann
patent: 4664732 (1987-05-01), Campbell et al.
patent: 5078489 (1992-01-01), Lieber

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