Abstract
A large aperture solar optical telescope and its instruments for the SOLAR-C mission are under study to provide the critical physical parameters in the lower solar atmosphere and to resolve the mechanism of magnetic dynamic events happening there and in the upper atmosphere as well. For the precise magnetic field measurements and high angular resolution in wide wavelength region, covering FOV of 3 arcmin x3 arcmin, an entrance aperture of 1.4 m Gregorian telescope is proposed. Filtergraphs are designed to realize high resolution imaging and pseudo 2D spectro-polarimetry in several magnetic sensitive lines of both photosphere and chromosphere. A full stokes polarimetry is carried out at three magnetic sensitive lines with a four-slit spectrograph of 2D image scanning mechanism. We present a progress in optical and structural design of SOLAR-C large aperture optical telescope and its observing instruments which fulfill science requirements.
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