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US 3,942,866 AGranted
Fiber-optical structure of high apparent power of resolution
AssigneeThomson-CSF Visualisation et Traitement des Informations (T-VT)
InventorPaul Roman
Life of this patent
Estimating the term…
Abstract
A light-conducting fiber, or a bundle of such fibers, is provided with a ht-absorbing shield extending beyond an end face of the fiber or bundle proximal to a light-reflecting object. The shield forms a light-guiding channel, of a length substantially exceeding its width, which limits the effective aperture angle of the fiber or bundle to considerably less than its inherent value on the order of 60.degree..
Claims3
A fiber-optical structure comprising:
- a pair of light-transmitting fiber bundles originating at a source of illuminating flux;
- a light-receiving fiber bundle bracketed by said light-transmitting fiber bundles for picking up reflected flux from an object illuminated by said light-transmitting fiber bundles, said light-receiving fiber bundle terminating at a receiver for the reflected flux, all said fiber bundles being of rectangular cross-section with coextensive contacting sides, said light-transmitting fiber bundles having ends remote from said source extending beyond an end of said light-receiving fiber bundle remote from said receiver for forming two opposite light-absorbing boundaries of a light-guiding channel traversed by the reflected flux, said remote end of said light-receiving fiber bundle being directly exposed to incident light;
- and
- a pair of parallel shield plates with light-absorbing surfaces overlying opposite sides of said fiber bundles transverse to said contacting sides and extending to said remote ends of said light-transmitting fiber bundles, thereby forming two other boundaries of said light-guiding channel.
1 more element
Dependencies are inferred from the claim text.