, Volume 75, Issue 1, pp 150-155
Date: 12 Jun 2008

Astigmatism correction for a large-aperture dispersive spectrometer

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Abstract

We have numerically modeled astigmatism correction for a large-aperture mirror spectrometer using a tilted plane-parallel plate. The results suggest a decrease in the height of the astigmatic focal spot by a factor of 2–7 over the entire image field without reducing the spectral resolution. We have demonstrated experimentally that the described correction method is feasible on a prototype of a spectrometer. Based on the numerical modeling and experimental data, we have shown that practical application of the method is feasible in order to substantially improve the sensitivity of spectral instruments.

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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 75, No. 1, pp. 143–148, January–February, 2008.