Physics – Optics
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1747...92g&link_type=abstract
In: Polarization and remote sensing; Proceedings of the Meeting, San Diego, CA, July 22, 23, 1992 (A93-30026 11-35), p. 92-101.
Physics
Optics
1
Acousto-Optics, Imaging Spectrometers, Polarimeters, Polarized Radiation, Space Observations (From Earth), Astronomical Photometry, Birefringence, Diffraction, Optical Filters, Performance Tests
Scientific paper
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.
Bergstralh Jay
Glenar David A.
Hillman John J.
Saif Babak
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