Device for evaluating the light-transmitting characteristics of

Details Device for evaluating the light-transmitting characteristics of Device for evaluating the light-transmitting characteristics of

1978-05-04

1980-04-08

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356432, G01N 2100

Patent

active

041970071

ABSTRACT:
To intercept and measure radiant energy back-scattered from the entrance end of an optical fiber irradiated by a pulsed laser beam, a semitransparent mirror is interposed between the irradiated fiber and a first lens assembly focusing the laser beam upon its entrance end while a second lens assembly directs reflected light rays toward a photodetector feeding an electronic processor. An extremity of the fiber including its entrance end is received in a chamber with light-absorbing walls filled with a liquid of substantially the same refractive index as the fiber; the mirror may be disposed either in front of the chamber entrance or in its interior.

REFERENCES:
patent: 3884585 (1975-05-01), Lebduska
patent: 4012149 (1977-03-01), Bouillie et al.
patent: 4021099 (1977-05-01), Kawasaki et al.
patent: 4021121 (1977-05-01), Schicketanz

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