A Grating Spectrometer and Fabry-Perot Interferometer for Use in the 1-MICRON to 5-MICRON Wavelength Region

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

An infrared spectrometer for the 1 μm < λ < 5 μm wavelength band is described. The instrument consists of a grating spectrometer cooled to solid nitrogen temperature, which can be used with a piezoelectrically scanned Fabry-Perot interferometer. Resolving powers between 102 and 105 can be achieved with this instrument. This particular combination of spectrometer components leads to high sensitivities longward of the 2 μm band, where Fourier transform spectrometers are more severely limited by noise from the thermal background.

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