多层共轭自适应光学系统中等晕角的计算

介绍了多层共轭自适应光学(MCAO)系统的基本原理及其对提高自适应光学系统的等晕角的作用。介绍了用计算机模拟计算MCAO等晕角所用的数值方法,并给出了相应的算法。计算了在传统的自适应光学系统中的等晕角的大小以及采用多层共轭技术的自适应光学系统的等晕角的大小,并对二者进行了比较,说明了多层共轭自适应光学系统相对于传统的自适应光学系统在提高系统的等晕角方面的优越性。结果表明,在MCAO中,变形镜的个数越多其等晕角越大。

Computation of isoplanatic angle in MCAO system

The basic theory of multi-conjugate adaptive optics (MCAO) and its ability of enhancement of the isoplanatic angle of the adaptive optics (AO) system are introduced. The method of how to compute these angles and the corresponding algorithm are also mentioned. The value of the isoplanatic angle of traditional AO system and its counterparts in the MCAO systems which have one or two DMs have been computed, but a certain height has been conjugated. And at last, the value of the isoplanatic angles of traditional AO system and MCAO system is compared. The advantage of MCAO on enlarging the isoplanatic angle and the conclusion show that the more DMs is used in one MCAO system, the larger isoplanatic angle is obtained.