Illumination Devices with Adjustable Optical Elements

Abstract

Illumination devices with adjustable optical elements configured to provide a variable illumination pattern of an area are described. The adjustable optical elements of the illumination devices can be traversed relative to a surface (e.g., a ceiling of a room) to vary the light distribution and/or intensity to the surface.

What is claimed is: 
     
         1 . A luminaire comprising:
 a housing having an opening extending along a path within a first plane;   a luminaire module extending along the path and configured to provide light during operation; and   an adjustable mount comprising multiple bolts and multiple mating portions, and movably coupling the luminaire module with the housing in a forward direction perpendicular to the first plane, the mating portions arranged in multiple rows perpendicular to the first plane, mating portions of each row arranged to engage with one of the bolts;   wherein axes of the bolts are arranged parallel to the first plane, the bolts and mating portions are arranged along the housing and are configured to releasably engage and allow different positions of the luminaire module along the forward direction.   
     
     
         2 . The luminaire of  claim 1 , wherein the adjustable mount is configured to retain the LEEs on a first side of the first plane and the optical extractor opposite of the first plane relative to the LEEs. 
     
     
         3 . The luminaire of  claim 1 , wherein the bolts are movable along their axes between depressed and protruding positions and are resiliently biased in the protruding positions via springs to engage corresponding mating portions and releasably secure the luminaire module in place. 
     
     
         4 . The luminaire of  claim 1 , wherein the luminaire module has an elongate extension within a second plane perpendicular to the first plane and all bolts are arranged on one side of the second plane along the extension of the luminaire module. 
     
     
         5 . The luminaire of  claim 1 , wherein the mating portions are openings provided by the housing. 
     
     
         6 . The luminaire of  claim 5 , wherein the openings are elongated parallel to the first plane. 
     
     
         7 . The luminaire of  claim 1 , wherein the adjustable mount comprises slides affixed to the luminaire module and rails affixed to the housing, the slides and rails arranged to engage one another with predetermined tolerances to avoid jamming of the luminaire module when sliding between the different positions. 
     
     
         8 . The luminaire of  claim 1  further comprising means for limiting movement of the luminaire module relative to the housing. 
     
     
         9 . The luminaire of  claim 1 , wherein the luminaire module comprises:
 a plurality of light-emitting elements (LEEs) arranged parallel to the path,   a light guide having side surfaces extending from an input edge to an output edge, the input edge arranged parallel to the first plane and optically coupled with the LEEs, the light guide configured to guide light received from the LEEs from the input edge to the output edge, the output edge spaced apart from the input edge in the forward direction, and   an optical extractor optically coupled with and extending along the output edge of the light guide, the extractor configured to output light along its extension in predetermined directions into the environment relative to the forward direction.   
     
     
         10 . The luminaire of  claim 9 , wherein the bolts are arranged adjacent one of the side surfaces of the light guide. 
     
     
         11 . The luminaire of  claim 9 , wherein the luminaire module further comprises a rail configured to register the LEEs with the light guide and provide optical coupling, and wherein the adjustable mount is affixed to the rail. 
     
     
         12 . The luminaire of  claim 1 , wherein the LEEs are arranged in a third plane and the bolts are arranged between the third plane and the first plane. 
     
     
         13 . The luminaire of  claim 1 , wherein at least a portion of the luminaire module is configured to extend through the opening of the housing.