Illumination – Elongated source light unit or support – With or including transparent or translucent member
Patent
1984-12-28
1987-02-17
Feinberg, Craig R.
Illumination
Elongated source light unit or support
With or including transparent or translucent member
362260, 362330, 362331, 362339, 362361, F21V 500
Patent
active
046444548
ABSTRACT:
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.
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Holophane Brochure for Merculine 2000 Series No. 6-S 1972 (Jan.).
Herst Douglas J.
Ngai Peter Y. Y.
Beeson Donald L.
Feinberg Craig R.
Peerless Lighting Corporation
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