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18 October 1999 Acquirement of digital solar magnetic images
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Abstract
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bing Zhang, Yuanyong Deng, and Jinshan Wang "Acquirement of digital solar magnetic images", Proc. SPIE 3808, Applications of Digital Image Processing XXII, (18 October 1999); https://doi.org/10.1117/12.365821
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