Fiber optic light launching assembly

Details Fiber optic light launching assembly Fiber optic light launching assembly

1978-08-14

1980-09-02

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

350 9618, 356432, G01N 2100

Patent

active

042204119

ABSTRACT:
An apparatus allows the testing of differently diametered optical fibers having different numerical apertures to determine their optical properties. A system of lenses and optically cooperating components permits the precise regulation of a light spot size and the adjustment of a particular numerical aperture so that equilibrium conditions at the launch end of a test fiber is created. Adjustments allow an observed variance of the spot size and numerical aperture so that the apparatus can accommodate differently sized test optic fibers.

REFERENCES:
patent: 3914013 (1975-10-01), Rosenberg
"An Apparatus for the Measurement of the Mode Cut-off Wavelengths of Opti Fibre Waveguides" Worthington; J. Phys. E.; vol. 4 #12; Dec. 1971; pp. 1052-1054.

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