Stepped light collection and concentration system,...

Optical waveguides – With optical coupler – Input/output coupler

Reexamination Certificate

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Details

C385S031000

Reexamination Certificate

active

07817885

ABSTRACT:
A light guide includes a light guide layer having a transversely oriented side-end surface that forms a primary output aperture (exit) for light traveling in a forward propagation direction out of the end surface of the light guide (for, e.g., CPV applications) and, which forms a primary input aperture (entrance) for light traveling in a rearward propagation direction into the end surface of the light guide (for, e.g., illuminator applications), and a first plurality of light injection elements stepped (staggered) in a forward light propagation direction in a first plane along lines parallel to the side-end surface or clocked (tilted) about a y-axis in a z-axis-light propagation direction in a respective first plane, wherein the light injection elements are disposed along parallel lines normal to the side-end surface. The light guide component may further comprise at least a second plurality of light injection elements stepped in at least second plane. A light guide system includes a component light guide, a lenslet array disposed adjacent a top surface of the light guide, and a light-transmitting, TIR medium layer disposed immediately adjacent at least one of the top and bottom surfaces of the light guide.

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Chakmakjian et al.; Lightguide Luminaire with Controlled Numerical Aperture for General Illumination; RPC Photonics, Inc.; www.RPCphotonics.com, 2006.

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