Titlebook: Optics in Astrophysics; Proceedings of the N Renaud Foy,Fran?oise Claude Foy Conference proceedings 2005 Springer Science+Business Media B.

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NATO Science Series II: Mathematics, Physics and Chemistryhttp://image.papertrans.cn/o/image/702753.jpg

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https://doi.org/10.1007/1-4020-3437-7Astrophysics; Augmented Reality; Continuous wave; LED; Laser; Performance; Redshift; astronomy; cosmology; gr

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978-1-4020-3436-7Springer Science+Business Media B.V. 2005

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脊椎動物

A BRIEF HISTORY OF ASTRONOMICAL TELESCOPES,A brief review of major milestones of the historical race to large telescopes is given, from the Galileo‘s refractor to the 4-6m class telescopes.

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SPECTROSCOPY,The basic principles of astronomical spectroscopy are introduced and the main types of dispersing element surveyed. The principles behind two modern spectroscopic techniques, multiple object and integral field spectroscopy, are also discussed.

Malfunction

LASER GUIDE STARS: PRINCIPLE, CONE EFFECT AND TILT MEASUREMENT,We explain the laser guide star concept and why we do need laser guide stars (LGS) to greatly enhance adaptive optics performances at large telescopes. Then we discuss the two physical limitations of LGS, which are the cone effect and the indetermination of the tilt of the incoming wavefront. Solutions to overcome them are explained.