Acquirement of digital solar magnetic images

Details Acquirement of digital solar magnetic images Acquirement of digital solar magnetic images

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3808..783z&link_type=abstract

Proc. SPIE Vol. 3808, p. 783-791, Applications of Digital Image Processing XXII, Andrew G. Tescher; Ed.

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The solar vector magnetograph system in Huai Rou Solar Observation station (HRSO) is described in this paper. First the measuring principle of magnetic field and velocity field are discussed. We take the simple two-passband birefringent filter as an example to explain the working principle of the narrow-band birefringent filter which is the core of acquiring magnetic field and velocity field. Then the 35 cm Solar Magnetic Field Telescope is described, including optic system, camera system and digital system. In camera system the advantages of scientific Charge Coupled Devices (CCD) are described. In digital system we introduce the necessary functions of image grabber which is suitable for acquiring solar magnetic field. At last the performance of the whole system is discussed such as resolution and signal-to-noise ratio, and one magnetic field image and one velocity field image in the same area on the Sun are shown.

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