Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Plural diverse optical devices
Patent
1987-09-29
1989-03-28
DeMeo, Palmer C.
Electric lamp and discharge devices
With optical device or special ray transmissive envelope
Plural diverse optical devices
313112, 313114, H01K 126, H01K 132
Patent
active
048167142
ABSTRACT:
A surface for reflecting light energy of a first frequency range while transmitting light energy of a second frequency range and an incandescent lamp employing such a surface utilizes an array of corner cube elements. Each element has three sides which are mutually perpendicular and meet at a common vertex. Each side of each element is a surface in the shape of a square. All edges of the three square sides have equal dimensions. The array of elements is arranged with each element except for extreme outer elements having all of its edges contiguous with corresponding edges of other elements so as to form a continuous surface of the elements such that the projection of outer edges of each element on a common plane through corners of each side diagonally opposite to the vertex of that element form a hexagon. At least one surface of each element being dichroic to allow transmission of light energy of the second frequency range while reflecting light energy of the first frequency range.
REFERENCES:
patent: 4275327 (1981-06-01), Walsh
patent: 4612473 (1986-09-01), Nilssen
DeMeo Palmer C.
Duro-Test Corporation
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