Prism light guide having surfaces which are in octature

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Details

350 9632, 350102, 350286, G02B 514

Patent

active

042602203

ABSTRACT:
The prism light guide is a longitudinal hollow structure made of transparent dielectric material. The structure has substantially planar inner and outer surfaces which are in "octature". The hollow structure is formed of one or more longitudinal sections which may be bonded together with an adhesive having a refractive index similar to the refractive index of the sections. The cross-section of each section is preferably constant along the length of the section, and the surfaces in each section are flat and polished smooth. One preferred light guide includes a rectangular or square hollow structure made of four longitudinal wall sections bonded together. Each wall section has a planar inner surface and an outer surface having 90.degree. angle longitudinal corrugations. The dielectric material is acrylic plastic or optically clear glass and the light guide includes an outer jacket for protecting the outer surface.

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Laakmann et al., "Waveguides: Characteristic Modes of Hollow . . . ", Appl. Optics, vol. 14, No. 5, May 1976, pp. 1334-1340.

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