Optical waveguides – Optical fiber bundle
Patent
1992-10-02
1994-06-07
Gonzalez, Frank
Optical waveguides
Optical fiber bundle
385116, 385121, 385127, G02B 604
Patent
active
053197313
ABSTRACT:
A fiber-optic array includes a plurality of optical fibers, each encased by a cladding material that significantly absorbs light. The refractive indices of the fiber core and its cladding are selected such that the acceptance angle of each fiber includes all rays incident upon the face of the fiber. Thus no unguided light enters one fiber and exits another fiber, and flare is controlled. By further having the cladding preferentially absorb totally internally reflected off-axis rays, the "effective" acceptance angle is limited to a value that provides increased depth of field in applications, e.g., involving film scanning.
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Eastman Kodak Company
Gonzalez Frank
Woods David M.
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