Fresnel lens concentrator

Stoves and furnaces – Stoves – Cooking

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126440, 136246, 350437, G02B 308

Patent

active

047997788

ABSTRACT:
The Fresnel lens concentrator is formed by a specially designed Fresnel lens and a solar cell located on the axis of the lens at its focal plane. The lens is designed so that its central facets project the light from the sun towards the outer periphery of the cell and facets progressively toward the periphery of the lens project light progressively toward the center of the cell to obtain a uniform distribution of light on the cell. Adjacent groups of facets of the lens project the light alternately in front and beyond the cell to maintain a constant light intensity for a certain depth of focus of the lens.

REFERENCES:
patent: 2588373 (1952-03-01), Erban
patent: 3020395 (1962-02-01), Peltz
patent: 3203306 (1965-08-01), Lefferts
patent: 3915148 (1975-10-01), Fletcher et al.
patent: 3991741 (1976-11-01), Northrup, Jr. et al.
patent: 4050782 (1977-09-01), Uchida et al.
patent: 4103673 (1978-08-01), Woodworth et al.
patent: 4134393 (1979-01-01), Stark et al.
patent: 4165734 (1979-08-01), Schmidt
patent: 4282858 (1981-08-01), Bowers, Jr.
patent: 4312330 (1982-01-01), Holdridge
James et al., "Fresnel Optics for Solar Concentration on Photovoltaic Cells", 13th IEEE Photovoltaic Specialists Conference, June 5-8, 1978.
Burgess et al., "One Kilowatt Photovoltaic Subsystem using Fresnel Lens Concentrators", 12th IEEE Photovoltaic Specialists Conference, Nov. 15-18, 1976.

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