System for transmission loss comparison

Details System for transmission loss comparison System for transmission loss comparison

1986-09-29

1988-07-26

Anderson, Bruce C.

Optics: measuring and testing

For light transmission or absorption

By comparison

250565, 250575, G01N 2100

Patent

active

047596317

ABSTRACT:
A system for transmission loss comparison permits enhanced accuracy over a wider dynamic range by providing a reference channel including a transmitter, receiver, and transmission path therebetween, and a sample channel, including a transmitter, receiver, and transmission path therebetween. A feedback arrangement is provided for adjusting the outputs of both of the reference and sample transmitters in relation to the signal output of the reference receiver, so as to produce a desired signal level of the reference receiver's output over a given dynamic range, so as to compensate for loss over the reference transmission path. In this way, a comparator connected to the outputs of the two receivers receives inputs that are compensated for effects of losses over the reference transmission path.

REFERENCES:
patent: 3740555 (1973-06-01), Schaefer
patent: 4095098 (1978-06-01), Looper
patent: 4350441 (1982-09-01), Wicienski

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