Zepp Andreas, Gladysz Szymon, Stein Karin, Osten Wolfgang
Appl Opt. 2021 Aug 1;60(22):F88-F98. doi: 10.1364/AO.425397.
The modal holographic wavefront sensor enables fast measurement of individual aberration modes without the need for time-consuming calculations. However, the measurement accuracy suffers greatly from intermodal crosstalk, caused when the wavefront contains more aberrations than the one to be measured. In this paper, we present sensor optimization to minimize this effect and show the improvement when using Karhunen-Lòeve instead of Zernike modes as the basis. Finally, we show in simulation that an open-loop adaptive optics system based on the optimized sensor can be used to correct the effect of realistic, dynamic atmospheric turbulence on a wavefront and increase its Strehl ratio significantly.
模态全息波前传感器能够快速测量单个像差模式，无需耗时的计算。然而，测量精度会因模态串扰而大幅下降，当波前包含的像差多于要测量的像差时就会产生这种串扰。在本文中，我们提出了传感器优化方法以最小化这种影响，并展示了使用卡尔胡宁 - 勒夫模式而非泽尼克模式作为基础时的改进效果。最后，我们在模拟中表明，基于优化传感器的开环自适应光学系统可用于校正实际动态大气湍流对波前的影响，并显著提高其斯特列尔比。
