Light guide parts for lighting fixtures

Abstract

This light-guiding component for a lighting fixture comprises a small, gently sloping entrance section in the shape of a truncated square pyramid and a larger, more steeply sloping tapered section also in the shape of a truncated square pyramid. The constricted section between the tapered section and the lens section (described below) is narrowed from the square base of the tapered section to its inscribed circle, with the lens section being integrated into the constricted section. This component maximizes light from a light source, such as a light-emitting diode, through the entrance section, guiding the light from the bottom of the tapered section to the circularly constricted illumination surface, and projecting a circular beam of uniform illuminance onto the front surface through the lens section. While light-guiding components for lighting fixtures consisting of a small, gently sloping entrance section in the shape of a truncated cone and a larger, more steeply sloping truncated cone have not been able to achieve circular illumination with uniform illuminance, this component achieves circular illumination with uniform illuminance throughout the entire circle. In the reference diagram showing the state of use, the product is depicted in blue, but in reality the entire product is a solid, transparent body.

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