Beam Shape Effects on Grating Spectrometer Resolution

Details Beam Shape Effects on Grating Spectrometer Resolution Beam Shape Effects on Grating Spectrometer Resolution

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.8710e&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #87.10; Bulletin of the American Astronomical Society, Vol. 31, p.1503

Astronomy and Astrophysics

Astronomy

Scientific paper

The collimated optical beam in a grating spectrometer is often circular or elliptical in cross section, so that different parts of the beam illuminate different numbers of grooves on the grating. Here we estimate the consequent loss in spectral resolution relative to that obtained with a beam which illuminates a fixed number of grooves. For representive diffraction resolution functions, the effect is to reduce the intrinsic resolving power of the spectrometer by about 15

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