Long Wavelength Spectrometer LWS

The ISO Long-Wavelength Spectrometer (LWS) covered the long wavelength spectral range between 43 ^m and 197 ^m with a single grating operating in either first or second order, and a block of ten order-sorting filters and photoconductive detectors, each covering approximately 1/10th of the total spectral range when the grating was scanned. Hence, like SWS, the spectrum recorded by LWS was composed of ten subspectra from the ten individual detectors, which were then overlapped. The resolving power varied between AA/A = 150-200 in the individual subspectra, but again, like SWS, this could be greatly increased to AA/A = 6,800-9,700 by the addition of one of two FP interferometers placed in the beam.

ftxlO 6x10*



Was this article helpful?

0 0

Post a comment