LENSES AND LIGHTING DEVICES INCLUDING SAME

摘要

Optical components for lighting devices and lighting devices including such components are described. In some embodiments the optical components are in the form of a lens that alter the distribution of light produced by a lighting fixture. In some embodiments, the lenses are in the form of a downlight to wallwash lens which, when placed in a downlight fixture, convert the light distribution to that of a wallwash fixture, e.g., causing the downlight to produce an off-axis light distribution, without changing the fixture. The lens includes a body with a light source facing side and an opposite room facing side having two optically active regions, each including structures that redirect a portion of light received through the light source facing side and incident thereon. The first region includes structures that redirect, via refraction, and the second region includes structures that redirect, in part via total internal reflection.

主权项

1. A lens, comprising:
a body comprising a light source facing side and a room facing side, the room facing side being substantially opposite the light source facing side and comprising a first optically active region and a second optically active region formed therein, wherein:
the first optically active region comprises first optically active structures configured to redirect, via refraction, a portion of light received through the light source facing side and incident thereon;the second optically active region comprises second optically active structures configured to redirect, in part via total internal reflection, a portion of light received through the light source facing side and incident thereon; andthe lens produces a light output having an off-axis light distribution.