Plantet C, Meimon S, Conan J-M, Fusco T
ONERA, The French Aerospace Lab 92322 Chatillon, France.
Opt Express. 2013 Jul 15;21(14):16337-52. doi: 10.1364/OE.21.016337.
Laser Tomographic and Multi-Conjugate Adaptive Optics systems rely on natural guide stars to sense low order aberrations (tip/tilt and focus). LIFT is a novel focal plane wavefront sensor (WFS), performing a maximum likelihood phase retrieval on a single image, with better sensitivity than a 2 × 2 Hartmann-Shack WFS. Its performance for the estimation of tip/tilt and focus is similar to a pyramid WFS without modulation, but with a simpler set-up. We present here the LIFT concept and associated data processing, as well as experimental results. We validate the estimation of tip/tilt and focus, with monochromatic and large bandwidth light, and verify the low noise sensitivity predicted by theory.
激光层析成像和多共轭自适应光学系统依靠自然导星来感知低阶像差（倾斜和聚焦）。LIFT是一种新型焦平面波前传感器（WFS），它对单幅图像执行最大似然相位检索，其灵敏度优于2×2哈特曼-夏克波前传感器。它在估计倾斜和聚焦方面的性能与无调制的金字塔波前传感器相似，但设置更简单。我们在此介绍LIFT概念及相关数据处理，以及实验结果。我们用单色光和宽带光验证了倾斜和聚焦的估计，并验证了理论预测的低噪声灵敏度。
