Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....91..369s&link_type=abstract
Astronomy and Astrophysics, vol. 91, no. 3, Nov. 1980, p. 369-371. In French.
Astronomy and Astrophysics
Astrophysics
17
Analyzers, Optical Measuring Instruments, Polarimetry, Polarization (Waves), Aberration, Atmospheric Turbulence, Magnetic Measurement, Quartz Crystals, Solar Spectra
Scientific paper
An optical analyzer system suitable for the precise measurement of polarization (down to 0.0001 or less) is described. Two states of polarization in the solar spectrum for a wide spectral range and for many solar points can be observed simultaneously. The analysis of polarization is obtained by using a pair of quartz crystals ensuring the same optical path for the two beams, whose separation is very small (200 or 400 microns in the present experiment). Consequently, all the effects such as optical aberrations and turbulence are practically the same for the two beams when passing through an optical system. An application to magnetic measurements is discussed.
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