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
- 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}
}
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