Dispersion-compensated fresnel lens
Abstract
A transmission grating is used to reduce chromatic aberration in a Fresnel lens, wherein the lens chromatic dispersion is offset and substantially canceled by the grating's diffraction-induced dispersion. The grating comprises a Fresnel-type pattern of microscopic facets molded directly into the lens surface. The facets would typically have a profile height of around 4.multidot.10.sup.-5 inch and a profile width of at least 10.sup.-3 inch. In its primary intended application, the invention would function to improve the optical performance of a Fresnel lens used to concentrate direct sunlight.
- Inventors:
-
- 1215 Brewster Dr., El Cerrito, CA 94530
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 868526
- Patent Number(s):
- 5161057
- Assignee:
- Johnson, Kenneth C. (1215 Brewster Dr., El Cerrito, CA 94530)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- dispersion-compensated; fresnel; lens; transmission; grating; reduce; chromatic; aberration; dispersion; offset; substantially; canceled; diffraction-induced; comprises; fresnel-type; pattern; microscopic; facets; molded; directly; surface; typically; profile; height; multidot; 10; -5; inch; width; -3; primary; intended; application; function; improve; optical; performance; concentrate; direct; sunlight; optical performance; intended application; transmission grating; fresnel lens; primary intended; chromatic dispersion; chromatic aberration; /359/
Citation Formats
Johnson, Kenneth C. Dispersion-compensated fresnel lens. United States: N. p., 1992.
Web.
Johnson, Kenneth C. Dispersion-compensated fresnel lens. United States.
Johnson, Kenneth C. Wed .
"Dispersion-compensated fresnel lens". United States. https://www.osti.gov/servlets/purl/868526.
@article{osti_868526,
title = {Dispersion-compensated fresnel lens},
author = {Johnson, Kenneth C},
abstractNote = {A transmission grating is used to reduce chromatic aberration in a Fresnel lens, wherein the lens chromatic dispersion is offset and substantially canceled by the grating's diffraction-induced dispersion. The grating comprises a Fresnel-type pattern of microscopic facets molded directly into the lens surface. The facets would typically have a profile height of around 4.multidot.10.sup.-5 inch and a profile width of at least 10.sup.-3 inch. In its primary intended application, the invention would function to improve the optical performance of a Fresnel lens used to concentrate direct sunlight.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1992},
month = {Wed Jan 01 00:00:00 EST 1992}
}
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