Physics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1130...60d&link_type=abstract
IN: New technologies for astronomy; Proceedings of the Meeting, Paris, France, Apr. 25, 26, 1989 (A90-37976 16-89). Bellingham,
Physics
Circular Polarization, Linear Polarization, Polarimeters, Polarized Light, Telescopes, Video Equipment, Charge Coupled Devices, Lunar Surface, Mars Surface, Solar Physics
Scientific paper
In videopolarimetry, which allows the imaging of an astronomical field on the sole basis of the light with which it is polarized, a polarization selector isolates the six Stokes parameters at will. A CCD detector array inputs images to both a video system and a memory, so that an interactive image processor can compute combinations of these images to furnish a final version of the scene in (1) degree of circular polarization, (2) degree of linear polarization, and (3) azimuth of linear polarization. A laboratory bidimensional polarization application is presented. The apparatus, which produces polarization images of planetary surfaces, can when adapted to a monochromatic solar telescope allow the analysis of photospheric active centers to produce magnetic, velocity, and temperature gradient images.
Dollfus Audouin
Fauconnier Thierry
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