Light-emitting unit for optical fiber lightguides

Details Light-emitting unit for optical fiber lightguides Light-emitting unit for optical fiber lightguides

1994-05-17

1995-04-18

Bovernick, Rodney B.

Optical waveguides

With optical coupler

Particular coupling structure

385 33, 385121, 385901, G02B 626

Patent

active

054085721

ABSTRACT:
A light-emitting unit is disclosed for optical fiber lightguides. The unit is especially useful for a signal display device for the display of traffic signals. The unit exhibits light fed by way of lightguides to a raster dot in the display area, a light entrance end for connection with the feeding end of the associated lightguide, and a light exit end forming, in the display area, the light exit surface of the raster dot. The unit includes a light-guiding central zone between the light entrance and light exit ends. This zone flares toward the light exit end substantially in a conical or pyramidal fashion. The light-emitting unit according to this invention is distinguished in that a tapering extension section is provided for obtaining a wider emission angle with a uniform, high light intensity over the entire angular range at the light exit end.

REFERENCES:
patent: 3941485 (1976-03-01), Madden
patent: 4611885 (1986-09-01), Boirat
patent: 5101466 (1992-03-01), Reidinger

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