초록 ▼

An elongated indirect luminaire is provided with two separate lens elements in the form of a primary trough-shaped lens cover supported over the luminaire\s light source and at least one secondary lens strip supported laterally of the primary lens cover. A prismatic surface is formed on the lens cov

An elongated indirect luminaire is provided with two separate lens elements in the form of a primary trough-shaped lens cover supported over the luminaire\s light source and at least one secondary lens strip supported laterally of the primary lens cover. A prismatic surface is formed on the lens cover for directing a portion of the available source light to the secondary lens strip; the secondary lens in turn has a prismatic surface designed for redirecting the light in a desired controlled fashion. The laterally placed secondary lens provides added control to the light distribution in the lateral regions of the luminaire near the luminaire\s operative horizontal plane, and, in the illustrated embodiment, is designed to slightly boost the light in the lateral regions near the horizontal plane in a manner that provides improved control over the luminance of the secondary lens at viewing angles near the horizontal plane of the fixture. Such optical control provides a visible low brightness secondary lens in a fixture mounted at or near eye level.

대표청구항 ▼

A lensed indirect luminaire having improved light distribution control comprising a light source, a housing for supporting said light source, said housing extending in a horizontal plane of the luminaire and being open generally upwardly and laterally of the luminaire to allow light from said light

A lensed indirect luminaire having improved light distribution control comprising a light source, a housing for supporting said light source, said housing extending in a horizontal plane of the luminaire and being open generally upwardly and laterally of the luminaire to allow light from said light source to be directed generally upwardly from said luminaire and laterally near and above the horizontal plane of the luminaire, a light transmitting primary lens means having along at least one of its sides a prismatic lens portion, said primary lens means being supported by said housing in spaced relation to said light source so as to receive at least a portion of said laterally directed light, and an elongated light transmitting secondary lens means positioned substantially normal to said plane, and having a prismatic lens portion, said secondary lens means being supported by said housing outwardly of and in lateral spaced relation to said primary lens means on the side of said prismatic lens portion of said primary lens, the linear prismatic surface portion of said primary lens means being formed to transmit therethrough and redirect substantially all light received from said light source in a direction towards said secondary lens means and the linear prismatic surface portion of said secondary lens means being formed to transmit therethrough and further redirect substantially all light from said primary lens means and whereby said first and second lens means effect directing the source light transmitted therethrough generally laterally of said luminaire to increasingly focus the source light as it passes through each of said lens means for controlling source light directionality near the plane of the housing.