Collimation lens system for led

摘要

A collimation lens system (100) for converging the light from an LED (30) into a light beam (L), comprises:
a central lens (10) aligned along an optical axis (X) with the LED (30) for converging inner light from the LED (30), the central lens (10) comprising an aspheric collimation plano convex lens (10) having a planar entrance surface (11) and an aspheric exit surface (12); and
a peripheral lens (20) surrounding the central lens (10) for converging outer light from the LED (30), the peripheral lens (20) comprising a total internal reflection collimation lens having an entrance surface (21) and an exit surface (22) and including a high order aspheric total internal reflection surface (23) for reflecting said outer light by way of total internal reflection. The central lens (10) and the peripheral lens (20) share a common focal point at which the LED (30) may be positioned.