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Title: 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:
 [1]
  1. 1215 Brewster Dr., El Cerrito, CA 94530
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
OSTI Identifier:
868526
Patent Number(s):
US 5161057
Assignee:
Johnson, Kenneth C. (1215 Brewster Dr., El Cerrito, CA 94530)
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 = {},
url = {https://www.osti.gov/biblio/868526}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

Patent:

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