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Fiber Optic Bundle Inspection Technique Disclosure Number: IPCOM000076681D
Original Publication Date: 1972-Apr-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 33K

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Mancini, RH: AUTHOR


This technique provides a visual inspection for defective fiber-optic bundles.

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Fiber Optic Bundle Inspection Technique

This technique provides a visual inspection for defective fiber-optic bundles.

The beam from a light source, e.g. laser 1, is transmitted through a small aperture in plate 2 to yield a small diameter beam. Source 1 has a wavelength which includes the particular color of the Protective jacket 3 which covers the fiber-optic bundle 4, c.f. Fig. 2. End 5 of the jacket/bundle 3, 4 is mounted in an x, y, z position holder 6. Holder 6 positions groups of fiber optic elements in bundle 4 with respect to the beam emerging from aperture 2. As a result, source 1 of Fig. 1 selectively illuminates groups of fiber-optic elements of bundle 4.

In operation, the light is conducted down the particular groups of fiber-optic elements selected. Light leakage occurs along the length of the selected elements causing the jacket 3 to glow.

In the absence of any defect in the selected elements, the jacket glows at a diminishing uniform intensity along its length. If the selected elements are defective, e.g. imperfections or breakages, at one or more places, the light travelling along the particular elements emerges at the defects and causes spatially corresponding bright spots 7 in the glowing jacket 3.

If the bright spots appear in a concentrated region, the bundle may be salvaged by cutting out the region containing the concentrated bright spots.

Alternatively, instead of using a visible wavelength inspection, an infrared (IR) source and IR detect...