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Development of multireflection absorption spectroscopy device using ultraviolet LEDs
Author(s) -
Fukuchi Tetsuo,
Shiina Tatsuo
Publication year - 2012
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11419
Subject(s) - light emitting diode , spectrometer , optics , optoelectronics , materials science , absorption (acoustics) , absorption spectroscopy , optical fiber , ultraviolet , spectroscopy , diode , physics , quantum mechanics
An ultraviolet absorption spectroscopy device using light‐emitting diodes (LEDs) as the light source was constructed. The measurement cell, light source, and transmitting and receiving optics were installed on a breadboard measuring 30 × 30 cm. A measurement optical path length of 1 m was made possible by multireflection optics. The device can mount two LEDs in tandem, and the transmitted light is coupled to an optical fiber, which is connected to a compact spectrometer. Two LEDs with center wavelengths of 280 and 295 nm were used to provide an emission spectrum which covered the peak region of the absorption spectrum of SO 2 . Experiments confirmed the linearity of the absorption coefficient measured by the device for SO 2 concentrations in the range of 16 to 800 ppm. © 2012 Wiley Periodicals, Inc. Electron Comm Jpn, 95(12): 62–68, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/ecj.11419