Collimation lens system for LED

Details Collimation lens system for LED Collimation lens system for LED

2008-12-23

2009-08-25

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Collimating of light beam

C359S708000, C362S317000

Reexamination Certificate

active

07580192

ABSTRACT:
A collimation lens system for converging the light from an LED into a light beam, includes a central lens aligned along the optical axis of the LED for converging inner light from the LED, the central lens including an aspheric collimation plano convex lens having a planar entrance surface and an aspheric exit surface; and a peripheral lens surrounding the central lens for converging outer light from the LED, the peripheral lens including a total internal reflection collimation lens having an entrance surface and an exit surface and including a high order aspheric total internal reflection surface for reflecting the outer light by total internal reflection. The central lens and the peripheral lens share a common focal point at which the LED may be positioned.

REFERENCES:
patent: 2007/0153402 (2007-07-01), Destain

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