Optical instrument for gathering and distribution of light

Details Optical instrument for gathering and distribution of light Optical instrument for gathering and distribution of light

1978-10-23

1981-02-24

Bauer, Edward S.

Illumination

Supported by vehicle structure

Condition responsive

362 26, G02F 113

Patent

active

042524164

ABSTRACT:
An optical instrument for the gathering and distribution of light comprises cylindrical and a planar body formed of transparent material and optically coupled together. The cylindrical body has an elliptic and circular outer surface covered with inwardly reflecting material and a light source arranged along one focal line for the elliptic surface portion. Light gathered by the cylindrical body is transmitted to the planar body and is diffused thereby over one major surface. The instrument is advantageously applied to the illumination of passive information displays such as found in liquid crystal display timepieces where efficient energy use is extremely important.

REFERENCES:
patent: 3840695 (1974-10-01), Fischer
patent: 3864905 (1975-02-01), Richardson
patent: 3994564 (1976-11-01), Somogyi
patent: 4043636 (1977-08-01), Eberhardt et al.

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