Active spectrographs: a new way to improve their quality

Rajiv K. Bhatia

doi:10.1117/12.176686

1 June 1994 Active spectrographs: a new way to improve their quality

Rajiv K. Bhatia

Proceedings Volume 2198, Instrumentation in Astronomy VIII; (1994) https://doi.org/10.1117/12.176686
Event: 1994 Symposium on Astronomical Telescopes and Instrumentation for the 21st Century, 1994, Kailua, Kona, HI, United States

Abstract

We discuss the various errors affecting an astronomical spectrograph, whether mounted directly at the telescope, or placed on a table. We then propose a method for measuring these errors, using the Shack-Hartmann principle, which has been successfully used in the field of active and adaptive optics. It is argued that such a measurement can be used to correct the aberrations on-line, leading to considerable improvement in the performance of the spectrographs, as well as leading to much reduced costs.

Citation Download Citation

Rajiv K. Bhatia "Active spectrographs: a new way to improve their quality", Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); https://doi.org/10.1117/12.176686

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