PHOTOVOLTAIC SYSTEMS BASED ON SPECTRALLY SELECTIVE CONCENTRATORS

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 15673
Amount: $493,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1992
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
18 Flagg Road, Hollis, NH, 03049
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jacques Ludman
 Principal Investigator
 (603) 465-3361
Business Contact
Phone: () -
Research Institution
N/A
Abstract
WE HAVE DEVELOPED A HOLOGRAPHIC DEVICE THAT GREATLY IMPROVES THE EFFICIENCY OF SOLAR ENERGY GENERATION. THE SINGLE-ELEMENT HOLOGRAM FOCUSES LIGHT TO THE SIDE AND ALSO SPECTRALLY SPLITS IT. THE OUTPUT APPEARS AS A THIN, CONCENTRATED LINE FOCUS PERPENDICULAR TO THE HOLOGRAM AND DISPLACED TO THE SIDE. DIFFERENT WAVELENGTHS ARE DIFFRACTED, CONCENTRATED, AND DISPERSED TO DIFFERENT LOCATIONS ON THE LINE. THE LINE RESEMBLES AN ELEGANT RAINBOW IN THE VISIBLE. THE HOLOGRAM LETS EACH OF TWO OR MORE DIFFERNT SOLAR CELLS ABSORB ONLY THOSE WAVELENGTHS THAT IT CAN EFFICIENTLY CONVERT TO ELECTRIC POWER. THE DEVICE ALSO PREVENTS OVERHEATING BY DIFFRACTING UNWANTED INFRARED AWAY FROM THE CELLS. THE SIDE FOCUS ELIMINATES SHADOW EFFECTS, AND COOLING IS EASY, SINCE THE CELLS ARE NOT CASCADED AND THE HEAT LOAD IS MINIMAL. THIS NOVEL SYSTEM IS IDEAL FOR CONCENTRATING, SPECTRUM SPLITTING, HIGH EFFICIENCY POWER GENERATION.

* Information listed above is at the time of submission. *

Agency Micro-sites

SBA logo
Department of Agriculture logo
Department of Commerce logo
Department of Defense logo
Department of Education logo
Department of Energy logo
Department of Health and Human Services logo
Department of Homeland Security logo
Department of Transportation logo
Environmental Protection Agency logo
National Aeronautics and Space Administration logo
National Science Foundation logo
US Flag An Official Website of the United States Government