You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
8 July 2014Performance of polarization modulation and calibration optics for the Daniel K. Inouye Solar Telescope
David F. Elmore,1 Stacey R. Sueoka,2 Roberto Casini3
1National Solar Observatory (United States) 2College of Optical Sciences, The Univ. of Arizona (United States) 3National Ctr. for Atmospheric Research (United States)
The Daniel K. Inouye Solar Telescope (formerly Advanced Technology Solar Telescope) will be the world's largest solar
telescope and polarimeter when completed in 2019. Efficient use of the telescope to address key science priorities calls
for polarization measurements simultaneously over broad wavelength ranges and calibration of the telescope and
polarimeters to high accuracy. Broadband polarization modulation and calibration optics utilizing crystal optics have
been designed for this application. The performance of polarization modulators and calibration retarders is presented
along with a discussion of the unique challenges of this application.
Polarimeters operate over the ranges of 0.38-1.1 microns, 0.5-2.5 microns, and 1.0-5.0 microns. Efficient polarization
modulation over these broad ranges led to modulators utilizing multiple wave plates and that are elliptical, rather than
linear, retarders. Calibration retarders are linear retarders and are constructed from the same sub-component wave plate
pairs as the polarization modulators. Polarization optics must address efficiency over broad wavelength ranges while
meeting beam deflection, transmitted wave front error, and thermal constraints and doing so with designs that, though
large in diameter, can be affordably manufactured.
The alert did not successfully save. Please try again later.
David F. Elmore, Stacey R. Sueoka, Roberto Casini, "Performance of polarization modulation and calibration optics for the Daniel K. Inouye Solar Telescope," Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91470F (8 July 2014); https://doi.org/10.1117/12.2054610