Dispersion-compensated fresnel lens

Title: Dispersion-compensated fresnel lens

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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:

Johnson, Kenneth C ^[1]

1215 Brewster Dr., El Cerrito, CA 94530

Publication Date:: 1992-01-01

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/

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                    Johnson, Kenneth C. Dispersion-compensated fresnel lens.  United States: N. p., 1992. 
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                    Johnson, Kenneth C. Dispersion-compensated fresnel lens.  United States.

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                    Johnson, Kenneth C. Wed .  
        "Dispersion-compensated fresnel lens".  United States.  https://www.osti.gov/servlets/purl/868526.

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@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}

}

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Dispersion-compensated Fresnel lens

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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[times]10[sup [minus]5] inch and a profile width of at least 10[sup [minus]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. 10 figs.
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