Optical coupler for distributive lighting system

Details Optical coupler for distributive lighting system Optical coupler for distributive lighting system

1997-02-25

1999-08-03

Quach, Y.

Illumination

Light fiber, rod, or pipe

With intensity control

362556, 362558, 362581, F21V 800

Patent

active

059315768

ABSTRACT:
A headlamp for a vehicle includes a holder for a light-distribution optical fiber of the type that has an output end emanating light of known spatial-intensity distribution, an optical coupler that has an input end adjacent the holder and includes a plurality of elements, each of which is positioned to receive light from a selected area of the light of known spatial intensity distribution and to alter the intensity or spatial distribution of that light to provide a predetermined spatial intensity distribution at an output of said coupler, and a projection lens to project the predetermined spatial intensity distribution to a desired illumination pattern. The optical coupler may be in the form of a mask and one or more filters or may be a number of light-transmitting elements that carry light from one spatial part of the input to a different spatial part in the output. In general, the optical coupler alters the intensity or angular distribution of the light pattern at the input to produce a desired light pattern at the output for projection onto the road by the projection lens.

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