Improved coupling of light from a small arc lamp to a larger...

G - Physics – 02 – B

Patent

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G02B 6/42 (2006.01) F21V 8/00 (2006.01) G02B 6/26 (2006.01)

Patent

CA 2370508

A light guide (8) is used to couple as much light as possible from an imaging source (1) having a large numerical aperture into a fiber optic component (7) with a relatively smaller numerical aperture. A tapered cladded rod, tapered fused bundle of optical fibers, tapered hollow reflective tube, CPC or negative lens when used as a light guide, provides for efficient coupling of light into a fiber optic component without loss of flux density. Such a system is especially advantageous when used with an imaging source that produces a very small image spot size with high numerical aperture, such as one producing a 1:1 image like a spherical off-axis reflector.

L'invention concerne un guide de lumière (8) utilisé pour coupler une quantité maximale de lumière, provenant d'une source d'imagerie (1) pourvu d'une large ouverture numérique, dans un composant (7) de fibre optique pourvu d'une ouverture numérique plus étroite. Lorsqu'une tige effilée enrobée, un faisceau de fibres optiques effilé et étiré, un tube effilé creux réfléchissant et un miroir composé ou une lentille négative font office de guide de lumière, ce dernier fournit un couplage efficace de la lumière dans un composant de fibre optique sans perte de densité de flux. Un tel système est particulièrement avantageux lorsqu'il est utilisé en association avec une source d'imagerie qui produit une très petite taille de spot image à large ouverture numérique, et produit une image 1:1 comme un réflecteur sphérique hors-axe.

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