Tir Systems Ltd.

St&eacute;phane Frederick Jacob

Allan Brent York

The color temperature of light emitted by a luminaire having a hollow prismatic light guide is varied to counteract aesthetically undesirable reddening gradient of the emitted light. Reddening is caused by the light guide's dielectric material, which absorbs blue light rays such that proportionately more red than blue rays are guided to the light guide's far end than to points near the guide's light input end. Flare light rays which escape through the light guide near its light input end are color filtered and reflected back into the light guide. The filter color lies within a CIE-1931 chromaticity diagram &lcub;4800&deg; Kelvin; 570 nm; 600 nm&rcub; color gamut triangle. Color filtering absorbs blue flare rays as a function of distance along the guide, imparting a near-end reddening gradient to the emitted light in inverse proportion to the far-end reddening gradient, giving the emitted light a constant apparent color, independent of distance along the guide.

Growing community of inventors

Port Moody, Canada

Stéphane Frederick Jacob

Growing community of inventors

Port Moody, Canada

St&eacute;phane Frederick Jacob

Stéphane Frederick Jacob