Pathak Biswajit, Boruah Bosanta R
Opt Lett. 2016 Dec 1;41(23):5600-5603. doi: 10.1364/OL.41.005600.
In this Letter, we introduce a scheme to enhance the spatial resolution of a zonal wavefront sensor. The zonal wavefront sensor comprises an array of binary gratings implemented by a ferroelectric spatial light modulator (FLCSLM) followed by a lens, in lieu of the array of lenses in the Shack-Hartmann wavefront sensor. We show that the fast response of the FLCSLM device facilitates quick display of several laterally shifted binary grating patterns, and the programmability of the device enables simultaneous capturing of each focal spot array. This eventually leads to a wavefront estimation with an enhanced spatial resolution without much sacrifice on the sensor frame rate, thus making the scheme suitable for high spatial resolution measurement of transient wavefronts. We present experimental and numerical simulation results to demonstrate the importance of the proposed wavefront sensing scheme.
在本信函中，我们介绍了一种提高区域波前传感器空间分辨率的方案。该区域波前传感器由一个由铁电空间光调制器（FLCSLM）实现的二元光栅阵列和一个透镜组成，取代了夏克-哈特曼波前传感器中的透镜阵列。我们表明，FLCSLM器件的快速响应有助于快速显示多个横向偏移的二元光栅图案，并且该器件的可编程性能够同时捕获每个焦斑阵列。这最终导致在不大幅牺牲传感器帧率的情况下实现具有增强空间分辨率的波前估计，从而使该方案适用于瞬态波前的高空间分辨率测量。我们给出了实验和数值模拟结果，以证明所提出的波前传感方案的重要性。
