Physics – Optics
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apopt..24.3893s&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 24, Nov. 15, 1985, p. 3893-3898.
Physics
Optics
11
Astronomical Photometry, Charge Coupled Devices, Electro-Optics, Polarimeters, Ultrasonic Light Modulation, Arrays, Beam Splitters, Birefringence, Demodulation, Polarization (Waves), Stokes Law
Scientific paper
It is shown how fast (50-100 kHz) piezoelastic modulation of the full Stokes vector can be used in combination with large CCD-type detector arrays with long integration times. The technique is to use an optical demodulation system (replacing the lockin amplifiers in corresponding single-channel detector systems). This allows the CCD detectors to be used with integration times and readout rates as in ordinary photometry. Including an optical phase switch in the system, the effect of the large pixel-to-pixel sensitivity variations can be removed from the recorded polarization images. The beam splitter that suppresses atmospheric noise can be located immediately before the detectors instead of being part of the polarization analyzer.
Povel H.
Stenflo Jan Olof
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