Method for inspecting multilayer transparent rods

Details Method for inspecting multilayer transparent rods Method for inspecting multilayer transparent rods

1982-03-29

1985-01-08

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356239, G01N 2188

Patent

active

044924631

ABSTRACT:
Various techniques for examining the core region of optical fibers and fiber preforms involve placing a portion of the fiber/preform in an index-matching fluid and transversely illuminating the immersed portion. As described herein, the use of an index-matching fluid can be eliminated by illuminating the fiber/preform with a diverging beam. By the suitable selection of parameters, refraction at the air-fiber/preform interface can produce a well colliminated beam within the core region.

REFERENCES:
patent: 3777171 (1973-12-01), Hollenbeck
patent: 4161656 (1979-07-01), Marcuse et al.
patent: 4168907 (1979-09-01), Presby
patent: 4181433 (1980-01-01), Marcuse
patent: 4307296 (1981-12-01), Presby
"Optical Fiber Preform Diagnostics", Presby et al., Applied Optics, vol. 18, No. 1, Jan. 1, 1979, pp. 23-30.

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