作者: W. C. Livingston , J. Harvey , A. K. Pierce , D. Schrage , B. Gillespie
DOI: 10.1364/AO.15.000033
关键词: Field (physics) 、 Spectrograph 、 Physics 、 Optics 、 Optical transfer function 、 Solar physics 、 Thermal 、 Transmission (telecommunications) 、 Telescope 、 Velocimetry
摘要: Described is a major new tool for solar research, conceived and built during time of budget restraint. The observation magnetic velocity (circulation) field structure on synoptic basis with diffraction-limited resolution the aim. New optical features include use oversize mirrors windows (to avoid thermal edge effects) placement coelostat feed outside vacuum, mainly economy. site selected has prevailing winds that clear thermals from these mirrors. Test data in form system MTF transmission, together examples full disk magnetograms photoheliograms, show present performance capability. Measured indicates response 0.2 at 1 sec arc (whereas would be ∼0.8). System including accompanying spectrograph, only 2–3% (λ0.44–1.1 μm). Thus, both quality efficiency are subject to improvement.