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Title: Apparatus for synthesis of a solar spectrum

Abstract

A xenon arc lamp and a tungsten filament lamp provide light beams that together contain all the wavelengths required to accurately simulate a solar spectrum. Suitable filter apparatus selectively direct visible and ultraviolet light from the xenon arc lamp into two legs of a trifurcated randomized fiber optic cable. Infrared light selectively filtered from the tungsten filament lamp is directed into the third leg of the fiber optic cable. The individual optic fibers from the three legs are brought together in a random fashion into a single output leg. The output beam emanating from the output leg of the trifurcated randomized fiber optic cable is extremely uniform and contains wavelengths from each of the individual filtered light beams. This uniform output beam passes through suitable collimation apparatus before striking the surface of the solar cell being tested. Adjustable aperture apparatus located between the lamps and the input legs of the trifurcated fiber optic cable can be selectively adjusted to limit the amount of light entering each leg, thereby providing a means of "fine tuning" or precisely adjusting the spectral content of the output beam. Finally, an adjustable aperture apparatus may also be placed in the output beam to adjust themore » intensity of the output beam without changing the spectral content and distribution of the output beam.« less

Inventors:
 [1]
  1. (Denver, CO)
Issue Date:
Research Org.:
MIDWEST RESEARCH INSTITUTE
OSTI Identifier:
868805
Patent Number(s):
5217285
Assignee:
United States of America as represented by United States Department (Washington, DC) NREL
DOE Contract Number:  
AC02-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; synthesis; solar; spectrum; xenon; lamp; tungsten; filament; provide; light; beams; contain; wavelengths; required; accurately; simulate; suitable; filter; selectively; direct; visible; ultraviolet; legs; trifurcated; randomized; fiber; optic; cable; infrared; filtered; directed; third; leg; individual; fibers; brought; random; fashion; single; output; beam; emanating; extremely; uniform; contains; passes; collimation; striking; surface; cell; tested; adjustable; aperture; located; lamps; input; adjusted; limit; amount; entering; providing; means; fine; tuning; precisely; adjusting; spectral; content; finally; placed; adjust; intensity; changing; distribution; fine tuning; infrared light; beam passes; optic fiber; ultraviolet light; output beam; fiber optic; solar cell; light beam; light beams; optic cable; optic fibers; tungsten filament; third leg; spectral content; beam emanating; solar spectrum; selectively adjusted; filter apparatus; provide light; filtered light; extremely uniform; selectively direct; suitable filter; violet light; light entering; /362/

Citation Formats

Sopori, Bhushan L. Apparatus for synthesis of a solar spectrum. United States: N. p., 1993. Web.
Sopori, Bhushan L. Apparatus for synthesis of a solar spectrum. United States.
Sopori, Bhushan L. Fri . "Apparatus for synthesis of a solar spectrum". United States. https://www.osti.gov/servlets/purl/868805.
@article{osti_868805,
title = {Apparatus for synthesis of a solar spectrum},
author = {Sopori, Bhushan L.},
abstractNote = {A xenon arc lamp and a tungsten filament lamp provide light beams that together contain all the wavelengths required to accurately simulate a solar spectrum. Suitable filter apparatus selectively direct visible and ultraviolet light from the xenon arc lamp into two legs of a trifurcated randomized fiber optic cable. Infrared light selectively filtered from the tungsten filament lamp is directed into the third leg of the fiber optic cable. The individual optic fibers from the three legs are brought together in a random fashion into a single output leg. The output beam emanating from the output leg of the trifurcated randomized fiber optic cable is extremely uniform and contains wavelengths from each of the individual filtered light beams. This uniform output beam passes through suitable collimation apparatus before striking the surface of the solar cell being tested. Adjustable aperture apparatus located between the lamps and the input legs of the trifurcated fiber optic cable can be selectively adjusted to limit the amount of light entering each leg, thereby providing a means of "fine tuning" or precisely adjusting the spectral content of the output beam. Finally, an adjustable aperture apparatus may also be placed in the output beam to adjust the intensity of the output beam without changing the spectral content and distribution of the output beam.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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