Luminaire

Claim 2

In combination with a luminaire comprising a light source and a reflector, said reflector including a plurality of elongated prisms for reflecting light incident thereon outwardly from said luminaire within a predetermined angular range, said prisms having peaks and valleys, a portion of the light incident on said peaks and valleys being transmitted therethrough as light leakage, a housing surrounding said reflector, said housing reflecting a portion of said light leakage, at least a portion of the surface of said housing adjacent said reflector including means for absorbing light incident thereon.

Claim 3

A combination as defined in claim 1, wherein said absorbing means are included on that portion of the surface of said housing adjacent said reflector from which light leakage incident thereon could be reflected therefrom to pass through said reflector and be distributed from said luminaire beyond said predetermined angular range.

Claim 4

In combination with a luminaire comprising a light source and a reflector, said reflector including a plurality of elongated prisms for reflecting light incident thereon outwardly from said luminaire within a predetermined angular range, said prisms having peaks and valleys, a portion of the light incident on said peaks and valleys being transmitted therethrough as light leakage, a housing surrounding said reflector said housing reflecting a portion of said light leakage within said predetermined range and having light absorbing means over a portion of it from which a part of the light leakage would be reflected outside said predetermined angular range.

Claim 5

In combination with a luminaire comprising a light source and a reflector, said reflector including a plurality of elongated prisms for reflecting light incident thereon outwardly from said luminaire within a predetermined angular range, said prisms having peaks and valleys, a portion of the light incident on said peaks and valleys being transmitted therethrough as light leakage, a housing surrounding said reflector said housing reflecting a portion of said light leakage within said predetermined range and having light absorbing means over a portion of it from which a part of the light leakage would be reflected outside said predetermined angular range.

Claim 6

A combination as dEfined in claim 3 wherein said absorbing means includes a black film on said housing.

Claim 7

The combination as defined in claim 4 wherein said film is paint.

Claim 8

A combination as defined in claim 5 wherein said housing is comprised of aluminum and wherein said adjacent surface has been treated with caustic soda prior to painting said surface with said film.

Claim 9

A combination as defined in claim 3 wherein said portion of said surface of said housing is the lower portion thereof.

Claim 10

A luminaire comprising a light source and a downwardly open, bowl shaped reflector, the reflector including a plurality of elongated prisms on its surface remote from the light source, said prisms reflecting light incident thereon outwardly from the luminaire through the open bottom of the reflector and within a predetermined low angular range, said prisms having peaks and valleys, a portion of the light incident on said peaks and valleys being transmitted therethrough as light leakage, a housing surrounding said reflector, said housing being reflective over an upper portion of it from which said light leakage is reflected through the open bottom of the reflector and within said predetermined angular range and having light absorbing means over a lower annular portion of its interior surface from which said light leakage would be, but for said light absorbing means, reflected through said open bottom of the reflector and above said predetermined angular range.

Claim 11

A luminaire comprising a light source and a downwardly open, bowl shaped reflector, the reflector including a plurality of elongated prisms on its surface remote from the light source, said prisms reflecting light incident thereon outwardly from the luminaire through the open bottom of the reflector and within a predetermined low angular range, said prisms having peaks and valleys, a portion of the light incident on said peaks and valleys being transmitted therethrough as light leakage, a housing surrounding said reflector, said housing being reflective over an upper portion of it from which said light leakage is reflected through the open bottom of the reflector and within said predetermined angular range and having light absorbing means over a lower annular portion of its interior surface from which said light leakage would be, but for said light absorbing means, reflected through said open bottom of the reflector and above said predetermined angular range.