adaptive optics;
laser guide star;
atmospheric tilt;
atmospheric turbulence;
image formation;
high power lasers;
D O I:
10.1117/12.321566
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
We describe the principle of the polychromatic laser guide star(LGS) to recover the tilt information in imaging through the atmosphere. Observations using the AVLIS laser at the Lawrence Livermore National Lab. are discussed in terms of returned flux in the ultraviolet. The major items of the programme ELP-OA, starting now in France, are briefly reviewed, as well as the organisation of theLGS R&D in Europe. Finally the conclusion outlines the possible improvements of the polychromatic LGS to allows us to reasonably implement it at large astronomical telescopes.