Method for inspecting transparent rods

Details Method for inspecting transparent rods Method for inspecting transparent rods

1977-12-30

1979-09-25

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356239, G01N 2132

Patent

active

041689070

ABSTRACT:
A sensitive, nondestructive method of viewing the internal structure of multilayered optical fiber preforms is described. The method comprises the steps of transversely illuminating the preform, and intercepting the light that traverses the preform on a viewing screen. To obtain a complete picture, the preform is rotated 360 degrees about its axis. The technique provides a detailed view of the core size and eccentricity, and of the structure of the multilayered core.

REFERENCES:
patent: 3777171 (1973-12-01), Hollenbeck
patent: 3879128 (1975-04-01), Presby
patent: 3980890 (1976-09-01), Heckrodt et al.
patent: 4021217 (1977-05-01), Bondybey et al.
patent: 4027977 (1977-06-01), Frazee, Jr. et al.
patent: 4042723 (1977-08-01), Presby

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