Light-pipe arrangement with reduced fresnel-reflection losses

Details Light-pipe arrangement with reduced fresnel-reflection losses Light-pipe arrangement with reduced fresnel-reflection losses

2007-03-13

2007-03-13

Healy, Brian (Department: 2883)

Optical waveguides

With optical coupler

Particular coupling structure

C385S050000, C385S058000, C385S070000, C385S051000

Reexamination Certificate

active

10797859

ABSTRACT:
A solid light pipe arrangement with reduced Fresnel-reflection losses includes a light pipe with a solid core comprising a polymer. An optically clear substrate has first and second sides with an anti-reflective coating on at least one side. The substrate is adhered to an end-face of the core of the light pipe by adhesive material so as to create an optically clear interface between the substrate and the end-face that passes more than about 96 percent of transmitted light. A preferred method of applying an anti-reflective coating to an end-face of a core of a solid, polymeric light pipe comprises diverting uncrosslinked polymer used for forming a light pipe core, and using the diverted polymer as adhesive material between a substrate with at least one antireflective coating and the end-face of a light pipe having the same polymeric components, in the same proportions, as the diverted polymer.

REFERENCES:
patent: 4456329 (1984-06-01), Henderson et al.
patent: 4535026 (1985-08-01), Yoldas et al.
patent: 4836633 (1989-06-01), Morgan et al.
patent: 6236793 (2001-05-01), Lawrence et al.
patent: 6969897 (2005-11-01), Kim, II
patent: 2002/0097956 (2002-07-01), Kikuchi et al.
patent: 2002/0168145 (2002-11-01), Yin

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