Abstract
Solar Hα is an important spectral line widely used to observe many solar phenomena, such as flares and filaments. The development of solar Hα space spectrometer is an urgent need in China. The solar Hα space spectrometer is composed of a front optical system (star-watching subsystem), a Czerny-Turner structure spectrometer, a scanning mirror system and an incident window. The focal length of the solar Hα space telescope is designed to be 1820 mm and the aperture of the solar Hα space telescope is 180 mm. The analysis shows that the pixel resolution of 0.523″ can be achieved by using the detector with the pixel size of 4.6 μm, and the rectangular field of view of 40′×40′ can be covered. According to the requirement of the target, in order to realize the central wavelength (+1) in the Hα band, a half-width spectrum (FWHM) of 0.15 is designed, and the working band is 6462.81– 6662.81 A.
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