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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[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.

Inventors:
Issue Date:
OSTI Identifier:
7206193
Patent Number(s):
5161057 A
Application Number:
PPN: US 7-537230
Assignee:
PTO; EDB-94-087247
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Resource Relation:
Patent File Date: 13 Jun 1990
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; FRESNEL LENS; CHROMATIC ABERRATIONS; PERFORMANCE; SOLAR CONCENTRATORS; DIFFRACTION GRATINGS; MITIGATION; EQUIPMENT; GRATINGS; LENSES; SOLAR EQUIPMENT; 141000* - Solar Collectors & Concentrators

Citation Formats

Johnson, K.C. Dispersion-compensated Fresnel lens. United States: N. p., 1992. Web.
Johnson, K.C. Dispersion-compensated Fresnel lens. United States.
Johnson, K.C. Tue . "Dispersion-compensated Fresnel lens". United States.
@article{osti_7206193,
title = {Dispersion-compensated Fresnel lens},
author = {Johnson, K.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[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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {11}
}