5月17日：Multi Object Spectrograph of the Fireball-II Balloon Experiment
报告题目:Multi Object Spectrograph of the Fireball-II Balloon Experiment
报告时间: 2016年5月17日（星期二）下午3:00
报告地点：南京天光所办公大楼二楼报告厅
Abstract1
Fireball-II is a NASA/CNES balloon-borne telescope and MOS for mapping the ultraviolet light of faint diffuse mediums around galaxies in space. It is optimized to the detection of red-shifted Lyman-？？ in the range ？？？？ [200-210nm]. The MOS is based on two identical reflective Schmidt systems sharing a plane-aspherized grating with elliptical symmetry obtained by active optics matrix and a double replication process.
Prof. Gerard R. Lemaitre
Emeritus Professor of Aix-Marseille University at LAM
He invented Variable Curvature Mirrors (VCMs) with cycloid-like form and/or tulip form mirror thickness distributions that work by in-situ stressing and air pressure or central axial force. Such VCMs presently equip the height delay lines of the Very Large Telescope Interferometer (VLTI), at Cerro Paranal, Chile, for high angular resolution studies.
He found the analytic formulation for (all-) Reflective Schmidt designs, that is the best shape to be given the primary mirror – or the grating in a reflective spectrograph. His formula was adopted for the design of many aspherized grating spectrographs and for the LAMOST design.
G. Lemaitre wrote a book entitled Astronomical Optics and Elasticity Theory - Active Optics Methods, 600 p., Springer edt. 2009.