LIGHT FIXTURE AND LENS ASSEMBLY FOR SAME

• US 20090141487A1
• Filed: 11/24/2008
• Published: 06/04/2009
• Est. Priority Date: 06/18/2004
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Inventors: Trott, Gary D., Gould, Carl T., Sharp, Christopher L., Mayfield, John T. III
• Granted Patent: US 7,918,589 B2
• Time in Patent Office: Days
• US Class Current: 362/223
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 23/026 Fastening of transformers or ballasts
• CPC Class Codes: F21V 5/02 of prismatic shape F21V5/04 takes precedence
• CPC Class Codes: F21Y 2103/00 Elongate light sources, e.g. fluorescent tubes
• CPC Class Codes: F21Y 2113/00 Combination of light sources

Abstract

A light fixture or troffer for directing light emitted from a light source toward an area to be illuminated, including a reflector assembly within which the light source is positioned and a lens assembly detachably secured to a portion of the reflector assembly such that a lens of the lens assembly overlies the light source and such that substantially all of the light emitted from the light source passes through the lens assembly. In one example, the lens includes a curved prismatic surface that can be oriented toward or away from the underlying light source.

Claims

1. A lens assembly for directing light emitted from a light source toward an area to be illuminated, the light source being elongated along a light source longitudinal axis, the lens assembly comprising:

an elongate lens extending along a lens longitudinal axis parallel to said light source longitudinal axis and having a central lens portion curved in a plane transverse to the lens longitudinal axis that defines a prismatic face that is oriented toward and spaced from said light source and an opposed, substantially smooth, exterior surface; and

a means for generating a plurality of spaced elongate stripes of reduced brightness to control high angle glare in the longitudinal direction optically.