Trilaminar dual reflex light guide

Details Trilaminar dual reflex light guide Trilaminar dual reflex light guide

1995-06-07

1997-07-22

Bovernick, Rodney B.

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

385121, 385131, 385133, 385901, G02B 610

Patent

active

056510861

ABSTRACT:
Three-layer light guide transports light from a source of low aspect ratio (e.g. nearly circular or nearly square) to one of high aspect ratio (e.g. narrow slit) to produce an output beam of low output divergence angles at high transfer efficiency. The design principle eliminates tapers or bends in the guide surfaces. Thereby, light from a conventional round lamp may be redirected with high optical efficiency to an aperture constrained to a long, narrow area, as in a slit headlight, a nacelle-rim light, a radome-edge light, or a landing light embedded in a wing having a sharp leading edge. The resulting far field intensity pattern is similar to that of a conventional sealed beam lamp.

REFERENCES:
patent: 4730895 (1988-03-01), Siedband et al.
patent: 5132530 (1992-07-01), Groh et al.
patent: 5159699 (1992-10-01), De Monts
patent: 5355249 (1994-10-01), Souda et al.
patent: 5357592 (1994-10-01), Neilson
patent: 5361160 (1994-11-01), Normandin et al.

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