Illumination – Light modifier – Refractor
Patent
1988-12-07
1990-02-20
Lazarus, Ira S.
Illumination
Light modifier
Refractor
362340, 362373, 362376, F21V 502, F21V 1500, F21V 2900
Patent
active
049031805
ABSTRACT:
This luminaire comprises a reflector of transparent material having a prismatic outer surface that includes many juxtaposed prisms. Each prism includes two reflecting surfaces meeting at an apex and having portions disposed to effect total internal reflection of a large percentage of the light rays from the light source of the luminaire. Immediately adjacent the outer surface of the reflector, there is a cover of substantially transparent material that protects the prism reflecting surfaces from deposits that could interfere with their total internal reflecting properties. The cover is spaced from the prismatic outer surface at substantially all points on the prism reflecting surfaces where such reflecting surfaces are disposed to effect total internal reflection of the light source rays.
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Brochure entitled Holophane Prismalume Luminaires, No. HL-755 1-84 by Manville Corp., Holophane Division, 4 pages; date printed on brochure: 1-84.
Brochure entitled Holophane Prismpack II and Warehouse Prismpack II Reflector Series, No. HL-427 by Manville Corp., Holophane Division, cover page, pp.2 and 3, date printed on brochure: 1-84.
Osteen Mitchell M.
Pearce J. Bradley
Taylor C. David
Corwin Stanley C.
General Electric Company
Jacob Fred
Lazarus Ira S.
McMahon John P.
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