Method and apparatus for detecting optimum alignment of optical

Details Method and apparatus for detecting optimum alignment of optical Method and apparatus for detecting optimum alignment of optical

1979-01-29

1980-08-05

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

350 9615, 350 9618, 350 9621, 356400, G01N 2100, G01B 1100

Patent

active

042159377

ABSTRACT:
A method and apparatus for detecting the lateral alignment of abutting optical fibers in a connector arrangement. A connector assembly having eccentric sleeves for effecting lateral alignment is shown. A light beam is introduced in an angle through the cladding of an optical fiber adjacent to its interface surface within one connector half. The light beam is launched into the fiber cladding at a plurality of angles using a light scattering bead of resin. The outside diameter of the ferrule assembly is concentric with the optical fiber and the connector shell externally, once the lateral alignment is effected. A termination fixture includes an objective lens which projects a magnified image of the optical fiber interface surface onto an aperture plate having an opening or window therein substantially the same diameter as the magnified optical fiber core, transmits substantially only light emitted from the cladding interface surface. A light-to-electric signal transducer (photo-diode for example) detects the illuminated and magnified image of the optical fiber cladding. A light intensity null detected by the transducer is indicative of proper alignment of the optical fiber with respect to the outside diameter of the connector shell and ferrule assembly.

REFERENCES:
patent: 3936143 (1976-02-01), Sato
patent: 3938895 (1976-02-01), Bridger et al.

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