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UV–Vis Spectrometers01:14

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
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Atomic Emission Spectroscopy: Instrumentation01:22

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Published on: December 22, 2015

Filter wedge spectrometer for field use.

W A Hovis1, W A Kley, M G Strange

  • 1Goddard Space Flight Center, Greenbelt,Maryland 20771, USA.

Applied Optics
|January 12, 2010
PubMed
Summary
This summary is machine-generated.

Two novel spectrometers using interference filter wedges were developed for field spectral measurements. These instruments successfully operated at high altitudes, demonstrating their value in challenging environments.

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Area of Science:

  • Spectroscopy
  • Optical Engineering
  • Atmospheric Science

Background:

  • Field spectral measurements are crucial for environmental monitoring.
  • Existing spectrometers may face limitations in harsh conditions.
  • Interference filter wedges offer potential for robust spectral analysis.

Purpose of the Study:

  • To construct and test two spectrometers for field spectral measurements.
  • To evaluate the performance of interference filter wedges in airborne and balloon-borne applications.
  • To demonstrate the utility of these spectrometers in hostile environments.

Main Methods:

  • Construction of two spectrometers utilizing interference filter wedges.
  • One spectrometer operated in the 1.6 to 5.4 micrometer range.
  • The second spectrometer operated in the 7.4 to 14.6 micrometer range.
  • Flight testing of spectrometers in an unpressurized airplane to 12.2 km.
  • Balloon testing of a spectrometer to 33.3 km.

Main Results:

  • Both spectrometers performed well under field conditions.
  • Successful spectral measurements were achieved at high altitudes.
  • The interference filter wedge proved to be a valuable component.

Conclusions:

  • Interference filter wedges are effective for building robust spectrometers.
  • The developed spectrometers are suitable for spectral measurements in hostile environments.
  • This technology advances capabilities for atmospheric and remote sensing.