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Coded Spectroscopy for Ethanol Detection in Diffuse Media

by Scott McCain
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Current price ₹4,512.00
Original price ₹5,145.00
Original price ₹5,145.00
Original price ₹5,145.00
(-12%)
₹4,512.00
Current price ₹4,512.00

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Book cover type: Paperback
  • ISBN13: 9783639052657
  • Binding: Paperback
  • Subject: N/A
  • Publisher: VDM Verlag Dr. Mueller E.K.
  • Publisher Imprint: VDM Verlag Dr. Mueller E.K.
  • Publication Date:
  • Pages: 88
  • Original Price: GBP 40.67
  • Language: English
  • Edition: N/A
  • Item Weight: 127 grams
  • BISAC Subject(s): N/A

Optical sensing in the visible and near-infrared regions of the electro-magnetic spectrum allows for non-invasive analysis of tissue. With the use of Raman spectroscopy, a high degree of chemical specificity is available with laser powers that are harmless to living tissue. Such systems, however, are plagued by the low efficiency of the Raman scattering process by molecules and the intense background fluorescence from some biological materials. To address these draw-backs, we have investigated the use of coded spectroscopy to make Raman spectroscopy more feasible in routine use. By coding the input aperture of a dispersive spectrometer, throughput gains of 10-100 are possible over a slit spectrometer. The theory, design, and performance characteristics of this static aperture coding will be discussed in this work. In addition, by coding the excitation light sources one can filter out the shifting Raman signals from the stationary fluorescent back-ground. The theory and implementation of an expectation maxi-mization algorithm for Raman signal reconstruction will be analyzed. The design of a multi-excitation, coded-aperture Raman spectrometer will be described.

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