5月19日：Reflective Schmidt Designs for Extended Object Detection in Space Astronomy – Active Optics Methods
报告题目:Reflective Schmidt Designs for Extended Object Detection in Space Astronomy – Active Optics Methods
报告时间: 2016年5月19日（星期四）上午10:00
报告地点：南京天光所办公大楼二楼报告厅
Abstract2
Fast reflective Schmidt’s allow accurate imaging of 3o diagonal sky fields over extended ranges from far-ultraviolet to infrared. For space astronomy we present 50cm aperture designs, 3- and 4-reflection, as fast as f/2, dedicatedto the detection of extended objects. Active optics methods are presented to obtain accurately the free-form aspheric mirror by SMP. The fabrication of 20-25cm telescope model – half-scale – could start soon.
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.