Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5171..207s&link_type=abstract
Telescopes and Instrumentation for Solar Astrophysics. Edited by Fineschi, Silvano; Gummin, Mark A. Proceedings of the SPIE,
Astronomy and Astrophysics
Astrophysics
22
Scientific paper
The National Solar Observatory in collaboration with the High-Altitude Observatory is developing a new solar polarimeter, the Diffraction Limited Spectro-Polarimeter. In conjunction with a new high-order adaptive optics system at the NSO Dunn Solar Telescope, the DLSP design facilitates very high angular resolution observations of solar vector magnetic fields. This project is being carried out in two phases. As a follow-on to the successful completion of the first phase, the ongoing DLSP Phase II implements a high QE CCD camera system, a ferro-electric liquid crystal modulator, and a new opto-mechanical system for polarization calibration. This paper documents in detail the development of the modulator system and its performance, and presents preliminary results from an engineering run carried out in combination with the new NSO high-order AO system.
Elmore David
Fletcher Stephen
Gregory Scott
Gullixson Craig
Hegwer Stephen
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