Minimizing instrumental polarization in the multiangle spectropolarimetric imager (MSPI) using diattenuation balancing between the three mirror coatings

Anna Britt Mahler, Nasrat A. Raouf, Paula K. Smith, Stephen C Mcclain, Russell A Chipman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Special enhanced silver mirror coatings were designed and fabricated to minimize the polarization introduced by a three-mirror off-axis high-accuracy telescope. A system diattenuation of approximately 1% in the VIS-NIR was achieved by both reducing the diattenuation from each mirror individually and by balancing the diattenuations introduced by the three mirrors over the spectral range. This process of low-polarization engineering involves minimizing system polarization introduced by surface geometry, thin film coatings and birefringent elements, and measuring the system. In this report we will outline a methodology to minimize instrumental polarization aberrations, with an emphasis on achieving low diattenuation in the MSPI camera, given its off-axis geometry and coating design constraints imposed by the space-based application. This polarization balancing technique for mirror coatings can be applied to astrophysics applications.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7013
DOIs
Publication statusPublished - 2008
EventOptical and Infrared Interferometry - Marseille, France
Duration: Jun 23 2008Jun 27 2008

Other

OtherOptical and Infrared Interferometry
CountryFrance
CityMarseille
Period6/23/086/27/08

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Keywords

  • Diattenuation
  • High reflectance
  • Low polarization
  • Polarization aberration
  • Retardance
  • Thin film coatings

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Mahler, A. B., Raouf, N. A., Smith, P. K., Mcclain, S. C., & Chipman, R. A. (2008). Minimizing instrumental polarization in the multiangle spectropolarimetric imager (MSPI) using diattenuation balancing between the three mirror coatings. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7013). [701355] https://doi.org/10.1117/12.791941