Modeling the image distortion of echelle spectrographs with T&P changes

Frank Grupp; ShaoMing Hu; Liang Wang

doi:10.1117/12.825845

19 August 2009 Modeling the image distortion of echelle spectrographs with T&P changes

Frank Grupp, ShaoMing Hu, Liang Wang

Proceedings Volume 7440, Techniques and Instrumentation for Detection of Exoplanets IV; 74401G (2009) https://doi.org/10.1117/12.825845
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

Even slight changes of temperature and pressure in high resolution ´Echelle spectrographs affect the spot image on the detector plane. At the same time astronomical applications require a stability of the measurement of up to 1/3000 of a pixel on the CCD (with a typical pixel size being 15μm). With this paper we present a study of the effects of thermal and pressure instabilities on ray tracing models of a typical ´Echelle spectrograph. We conclude the required minimum stabilty in these two parameters to reach the goal of precision spectroscopy.

Citation Download Citation

Frank Grupp, ShaoMing Hu, and Liang Wang "Modeling the image distortion of echelle spectrographs with T&P changes", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74401G (19 August 2009); https://doi.org/10.1117/12.825845

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