Transparent light guide members

Details Transparent light guide members Transparent light guide members

1997-11-13

1999-10-26

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

G02B 626

Patent

active

059742135

ABSTRACT:
A light guide member for guiding a beam of light from a light emitting element, fixedly mounted on a printed circuit board, towards a display window defined in a casing that encloses the light emitting element and the printed circuit board therein. The light guide member includes a transparent rod having at least first and second reflecting surfaces defined therein at different locations along the length of the transparent rod. The transparent rod is designed to allow the beam of light to travel in three dimensions along the entire length of the transparent rod from a light receiving face, defined at one end of the transparent rod, to a light emitting face defined at the opposite end of the transparent rod.

REFERENCES:
patent: 3801181 (1974-04-01), Kitano et al.
patent: 4345818 (1982-08-01), Blum
patent: 4687928 (1987-08-01), Thurston
patent: 4806013 (1989-02-01), Bodenheimer et al.
An English Llnguage Abstract of JP 4-81101. (No Date)
An English Language Abstract of JP 7-230024. (No Date)
An English Language Abstract of JP 8-184713. (No Date)
European Standard PrEN 50178, "Electronic Equipment for use in Power Installations", Oct.1996.
British (European) Standard EN 61131-2, "Programmable Controllers, Part 2: Equipment Requirements and Tests," Aug. 1994.

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