Methods for manipulating light extraction from a light guide

Details Methods for manipulating light extraction from a light guide Methods for manipulating light extraction from a light guide

2007-10-02

2007-10-02

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C362S559000, C362S615000

Reexamination Certificate

active

11267945

ABSTRACT:
In one embodiment, a method of defining an array of extractor elements configured to extract light from a light guide, and thereby produce a desired spatial light pattern ETquantifying optical output at a plurality of locations across the light guide is provided. The method comprises calculating a first spatial light pattern produced by a first array of extractor elements. The first spatial light pattern quantifies optical output at the plurality of locations across the light guide. The method further comprises determining a ratio R of the optical output of the desired spatial light pattern to an optical output of the first spatial light pattern. The method further comprises determining a modified ratio R′, wherein R′=Rαand |α|<1. The method further comprises determining a characteristic of a second array of extractor elements by scaling a characteristic of the first array of extractor elements by the modified ratio R′.

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