Light guide and illumination device having same

Details Light guide and illumination device having same Light guide and illumination device having same

2011-07-05

2011-07-05

Spector, David N (Department: 2873)

Illumination

Light modifier

Refractor

C362S311030, C362S311060, C362S326000, C362S336000

Reexamination Certificate

active

07972042

ABSTRACT:
A light guide is a quarter of cylinder in shape and includes a cylindrical emitting surface, an incident surface adjacent to and facing away from the cylindrical emitting surface, and a connecting surface connecting the cylindrical emitting surface and incident surface. The light guide defines five a number of grooves in the incident surface. Each groove is bounded by two surfaces. The inclined angle of the two surface is designed to satisfy a set of conditions to improve light uniformity of the cylindrical emitting surface.

REFERENCES:
patent: 7828471 (2010-11-01), Lin

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