Light-emitting device

Details Light-emitting device Light-emitting device

2007-10-09

2007-10-09

Tso, Laura (Department: 2875)

Illumination

Light fiber, rod, or pipe

Laser

C362S558000, C362S259000, C362S577000, C362S120000, C362S124000

Reexamination Certificate

active

11300509

ABSTRACT:
Coherent light, as produced by lasers, is much more intense and bright than non-coherent light. However, unlike non-coherent light sources coherent light from a laser does not radiate away from its source in a spherical fashion, but instead travels in a substantially straight path directly away from the source in a unidirectional beam. Direct exposure to coherent light is potentially dangerous to the human eye and consumer products employing laser-light sources are carefully regulated. Consequently, as a result of the radiation characteristics of coherent light, coherent light sources have not previously been employed for use in a signaling wand or any other direct-lighting apparatus. In contrast to the prior art, embodiments of the present invention provides an apparatus for emitting intense non-coherent light derived from a coherent light source (e.g. laser).

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patent: 6835440 (2004-12-01), Konishi et al.
patent: 2002/0114168 (2002-08-01), Pelka et al.

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