瑞利导星和钠导星共用的多层波前探测技术

目的 提出一种对分层大气湍流所引起的波面畸变进行有效探测的技术。方法 假设大气湍流主要集中有两薄层中，用同一束发射激光通过时间选通既产生钠导星，又产生瑞利导星。前可探测两层湍流引起的光波波前总畸变后，后则用于探测低层湍流单独引起的波面相差，建立这些畸变量之间的耦合方程，并进行求解。结果 得到高层湍流单独引起的波前畸变。结论 用这种方法可以方便地探测两层大气湍流所引起的波面畸变，从而为分层校正宽

Rayleigh and Sodium Guide Stars in the Multilayers Sensing of Adaptive Optics

Aim To put forward an effective survey technigue of the wavefront distortion caused by the atmospheric turbulence. Methods Supposing the turbu lence concentrates mainly on to two thin layers, one laser beam produces both the sodium guide star and Rayleigh guide star by using the temporal gate. The former can be used to measure the total phase distortion caused by two layers of the turbulence while the latter provides a suitable probe signal for the contribution of the low altitude. A set of equations linking these variables is established and resolved. Results\ The wavefront distortion caused by the high altitude turbulence alone is got. Conclusion The wavefront distortion caused by either low or high altitude turbulence can be obtained easily with this technique, thus the basis is provided for multilayer correction adaptive optics with wide field of view.