Method for taking a spatially resolved spectrum by means of a fourier-transform (FT)-spectrometer and such spectrometer
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United States of America Patent
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Aug 16, 2005
Grant Date -
Apr 10, 2003
app pub date -
Sep 6, 2002
filing date -
Sep 8, 2001
priority date (Note) -
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Abstract
A method for taking a spatially resolved spectrum, in particular an infrared (IR) spectrum, of a sample by means of a Fourier-transform (FT)-spectrometer, is described wherein light emitted by a light source is fed to an interferometer, directed onto the sample and detected by an array-detector, wherein a movable reflector of the interferometer is displaced over a distance s and the array-detector is read out at a number n of predetermined discrete way points s1, . . . , sn of the distance s, respectively. When the movable reflector is displaced over the distance s, the array-detector is first read out at respective non-adjacent way points sd separated by at least one respective intermediate way point si, and that the movable reflector is displaced over the distance s at least twice, wherein the array-detector is read out at the way points si upon a second or further repeated displacement over the distance s.
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