OPTICAL SYSTEM FOR INJECTION OF LIGHT FROM A LIGHT SOURCE INTO A MEDIUM

摘要

The invention relates to an optical system for injection of light from a light source into a medium, in particular into a light guide fibre. The optical system comprises at least one light-deflecting surface, which directs the light into the medium by reflection or refraction. The light-deflecting surface is of such a form that the light source is not sharply imaged in the medium or on the surface thereof. Said optical system is particularly suitable for injection of high intensity light into the medium, without giving rise to non-linear optical effects or material damage as a result of a local light density which is too high.