Fine optical alignment correction of astronomical spectrographs via in-situ full-field moment-based wavefront sensing

Hanshin Lee; Gary J. Hill; Sarah E. Tuttle; Brian L. Vattiat

doi:10.1117/12.926741

13 September 2012 Fine optical alignment correction of astronomical spectrographs via in-situ full-field moment-based wavefront sensing

Hanshin Lee, Gary J. Hill, Sarah E. Tuttle, Brian L. Vattiat

Author Affiliations +

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84500V (2012) https://doi.org/10.1117/12.926741
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The image moment-based wavefront sensing (IWFS) utilizes moments of focus-modulated focal plane images to determine modal wavefront aberrations. This permits fast, easy, and accurate measurement of wavefront error (WFE) on any available finite-sized isolated targets across the entire focal plane (FP) of an imaging system, thereby allowing not only in-situ full-field image quality assessment, but also deterministic fine alignment correction of the imaging system. We present an experimental demonstration where fine alignment correction of a fast camera system in a fiber-fed astronomical spectrograph, called VIRUS, is accomplished by using IWFS.

Citation Download Citation

Hanshin Lee, Gary J. Hill, Sarah E. Tuttle, and Brian L. Vattiat "Fine optical alignment correction of astronomical spectrographs via in-situ full-field moment-based wavefront sensing", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84500V (13 September 2012); https://doi.org/10.1117/12.926741

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