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Proceedings Paper

POLARIS-II: an acousto-optic imaging spectropolarimeter for ground-based astronomy
Author(s): David Alan Glenar; J. J. Hillman; Babak N. Saif; J. Bergstrahl
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Paper Abstract

A compact, acousto-optic tunable filter (AOTF) imaging spectropolarimeter for ground based astronomy from 400-1100 nm has been constructed at NASA/GSFC. The key components of this instrument are a TeO2 non-collinear AOTF, CCD camera, and an all-reflective optical relay assembly which uses a single elliptical mirror to produce side-by-side orthogonally polarized spectral images. The instrument was used at the Lowell Observatory 42-inch telescope for 'first light' planetary imaging and measurements of photometric standard stars. Narrow-band images of Saturn near 700 nm appear to show polarization effects which result from multiple scattering by aerosols. The instrument has recently been upgraded in order to integrate the RF drive electronics and eliminate contamination by scattered light. Design of the instrument and some initial results are presented.

Paper Details

Date Published: 8 December 1992
PDF: 10 pages
Proc. SPIE 1747, Polarization and Remote Sensing, (8 December 1992); doi: 10.1117/12.138833
Show Author Affiliations
David Alan Glenar, NASA Goddard Space Flight Ctr. (United States)
J. J. Hillman, NASA Goddard Space Flight Ctr. (United States)
Babak N. Saif, Engineering and Economics Research, Inc. (United States)
J. Bergstrahl, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 1747:
Polarization and Remote Sensing
Walter G. Egan, Editor(s)

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