Low glare wall wash light fixture

Abstract

A wall wash recessed light fixture has an enclosure, an aperture, an LED module, a tubular reflector, a lens, a trim element and a diffuser. The lens is disposed at an opening of the tubular reflector, has a concave surface facing the LED module and a convex surface facing the aperture, and has a principal axis aligned at an oblique angle Θ 1 relative to an optical axis of the LED module. An internal kicker reflector is offset from the optical axis of the LED module toward a second end of the light fixture, and is substantially parallel to a height axis (Z) and lateral axis (X) and faces a center axis of the aperture and. The trim element is disposed below the collimator assembly and at least partially in the opening of the ceiling. A first diffuser covers a first trim opening and is aligned at an oblique angle relative to the longitudinal axis (X).

What is claimed: 
     
         1 . A wall wash recessed light fixture operable to emit light through an opening in a ceiling toward a wall adjacent to the opening, the light fixture comprising:
 mutually perpendicular longitudinal (Y), lateral (X) and height (Z) axes;   a first end and a second end opposite the first end along the longitudinal axis (Y), and a first side and a second side opposite the first side along the lateral axis (X);   an enclosure having a bottom wall and an aperture in the bottom wall, and the aperture having a center axis passing through a center of the aperture and substantially perpendicular to a plane of the aperture and substantially parallel to the height axis (Z);   an LED module operable to emit light through the aperture, the LED module having an optical axis passing through the aperture and substantially parallel to the height axis (Z), and the optical axis being substantially offset from the center axis of the aperture toward the second end of the light fixture;   a collimator assembly having a tubular reflector and a lens;   the tubular reflector having a first end disposed around the LED module and having a second end with an opening, and the tubular reflector being operable to direct substantially all of the light emitted from the LED module toward the opening of the tubular reflector;   the lens being disposed at the opening of the tubular reflector, the lens having concave surface facing the LED module and a convex surface facing the aperture, and the lens having a principal axis aligned a first oblique angle Θ 1  relative to the optical axis of the LED module;   an internal kicker reflector having a reflective surface disposed substantially parallel to the height axis (Z), the reflective surface facing the center axis of the aperture and being substantially offset from the optical axis of the LED module toward the second end of the light fixture;   a trim element operable to be disposed below the collimator assembly and at least partially in the opening of the ceiling, the trim element having a first trim opening; and   a first diffuser covering the first trim opening, the first diffuser being aligned at a second oblique angle relative to the longitudinal axis (X).   
     
     
         2 . A wall wash recessed light fixture as in  claim 1 , wherein:
 a radius of curvature R 1  of the concave side of the lens is substantially greater than a radius of curvature R 2  of the convex side.   
     
     
         3 . A wall wash recessed light fixture as in  claim 2 , wherein:
 the concave side of the lens has a first center of curvature and the LED module is intermediate the first center of curvature and the lens, and the convex side of the lens has a second center of curvature and the second center of curvature is intermediate the LED module and the lens.   
     
     
         4 . A wall wash recessed light fixture as in  claim 3 , wherein:
 the lens preferably has a substantially constant cross-section in the lateral axis (X) and is substantially symmetrical about a central plane of the lens parallel to an Y-Z plane.   
     
     
         5 . A wall wash recessed light fixture as in  claim 4 , wherein:
 the concave and convex sides of the lens are partially cylindrical.   
     
     
         6 . A wall wash recessed light fixture as in  claim 1 , wherein:
 the reflective surface of the kicker reflector has a plurality of prismatic features which extend laterally (X axis) along a length of the reflective surface.   
     
     
         7 . A wall wash recessed light fixture as in  claim 6 , wherein:
 the prismatic features of the reflective surface of the kicker reflector are substantially identical, and substantially evenly vertically-spaced (Z axis).   
     
     
         8 . A wall wash recessed light fixture as in  claim 7 , wherein:
 a lateral length (X axis) of the prismatic features of the reflective surface of the kicker reflector is substantially greater than a corresponding lateral length of the lens.   
     
     
         9 . A wall wash recessed light fixture as in  claim 1 , further comprising:
 a collar extending from the bottom wall of the enclosure and surrounding the aperture, and being configured to extend into the opening in the ceiling;   the collar having a far side offset from the center axis of the aperture toward the second end of the light fixture, parallel the longitudinal axis (Y); and   the kicker reflector being adjacent the far side of the collar.   
     
     
         10 . A wall wash recessed light fixture as in  claim 1 , further comprising:
 the trim element having a second trim opening below the first trim opening; and   a second diffuser being disposed below the first diffuser and covering the second trim opening.   
     
     
         11 . A wall wash recessed light fixture as in  claim 10 , wherein:
 the second diffuser is configured to be substantially flush with a bottom surface of the ceiling.   
     
     
         12 . A wall wash recessed light fixture as in  claim 1 , wherein:
 the second oblique angle of the first diffuser is substantially equal to the first oblique angle Θ 1  of the principal axis of the lens.   
     
     
         13 . A wall wash recessed light fixture as in  claim 1 , further comprising:
 the collimator assembly is removable from, and installable in, the enclosure through the aperture, from within a room below the light fixture.   
     
     
       14. A wall wash recessed light fixture operable to emit light through an opening in a ceiling toward a wall adjacent to the opening, the light fixture comprising:
 mutually perpendicular longitudinal (Y), lateral (X) and height (Z) axes;   a first end and a second end opposite the first end along the longitudinal axis (Y), and a first side and a second side opposite the first side along the lateral axis (X);   an enclosure having a bottom wall and an aperture in the bottom wall, and the aperture having a center axis passing through a center of the aperture and substantially parallel to the height axis (Z);   an LED module operable to emit light through the aperture, the LED module having an optical axis passing through the aperture and substantially parallel to the height axis (Z), and the optical axis being substantially offset from the center axis of the aperture toward the second end of the light fixture;   a collimator assembly having a tubular reflector and a lens;   the tubular reflector having a first end disposed around the LED module and having a second end with an opening, and the tubular reflector being operable to direct substantially all of the light emitted from the LED module toward the opening of the tubular reflector;   the lens being disposed at the opening of the tubular reflector, the lens having concave surface facing the LED module and a convex surface facing the aperture, and the lens having a principal axis aligned at a first oblique angle Θ 1  relative to the optical axis of the LED module;   an internal kicker reflector having a reflective surface disposed substantially parallel to the height axis (Z), the reflective surface facing the center axis of the aperture and being substantially offset from the optical axis of the LED module toward the second end of the light fixture;   a first diffuser; and   a trim element.    
     
     
       15. A wall wash recessed light fixture as in  claim 14 , further comprising:
 the first diffuser being disposed below the lens, and the first diffuser being aligned at a second oblique angle relative to the longitudinal axis (X).    
     
     
       16. A wall wash recessed light fixture as in  claim 14 , wherein:
 a radius of curvature R 1  of the concave side of the lens is substantially greater than a radius of curvature R 2  of the convex side;   the concave side of the lens has a first center of curvature and the LED module is intermediate the first center of curvature and the lens, and the convex side of the lens has a second center of curvature and the second center of curvature is intermediate the LED module and the lens;   the lens preferably has a substantially constant cross-section in the lateral axis (X) and is substantially symmetrical about a central plane of the lens parallel to an Y-Z plane; and   the concave and convex sides of the lens are partially cylindrical.    
     
     
       17. A wall wash recessed light fixture as in  claim 14 , wherein:
 the reflective surface of the kicker reflector has a plurality of prismatic features which extend laterally (X axis) along a length of the reflective surface;   the prismatic features of the reflective surface of the kicker reflector are substantially identical, and substantially evenly vertically-spaced (Z axis); and   a lateral length (X axis) of the prismatic features of the reflective surface of the kicker reflector is substantially greater than a corresponding lateral length of the lens.    
     
     
       18. A wall wash recessed light fixture as in  claim 15 , further comprising:
 the trim element having a trim opening;   a second diffuser being disposed below the first diffuser and covering the trim opening; and   the second diffuser is configured to be substantially flush with a bottom surface of the ceiling.    
     
     
       19. A wall wash recessed light fixture as in  claim 15 , wherein:
 the second oblique angle of the first diffuser is substantially equal to the first oblique angle Θ 1  of the principal axis of the lens.