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Design of a spatially phase shifted self-referencing interferometer wave front sensor

机译：空间相移自参考干涉仪波前传感器的设计

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Over the last few years the Starfire Optical Range, Air Force Research Laboratory, Kirtland AFB, has been developing the self-referencing interferometer (SRI) wave front sensor (WFS). The objective of this project has been to demonstrate and evaluate the performance advantages the SRI WFS provides over conventional WFSs, particularly in applications requiring laser propagation in strong scintillation. The initial SRI prototypes relied on a temporal phase shifting approach to produce and capture the required interference images for wave front reconstruction. This approach simplified the initial development by minimizing issues related to detector calibration and the co-alignment of beams. In this paper we discuss the next step in our SRI development efforts and present the design of a spatial phase shifting SRI WFS. The design allows all four interference images— with respective phase shifts of 0, π/2, π, and 3π/2 between the reference and signal beams—to be captured simultaneously on a single camera. Initial results from a laboratory demonstration of the design are shown.
机译：在过去的几年中，位于Kirtland AFB的空军研究实验室Starfire光学靶场一直在开发自参考干涉仪（SRI）波前传感器（WFS）。该项目的目的是证明和评估SRI WFS与常规WFS相比所提供的性能优势，特别是在需要强闪烁的激光传播的应用中。最初的SRI原型依赖于时间相移方法来生成和捕获所需的干涉图像，以进行波前重建。这种方法通过最小化与检测器校准和光束共对准有关的问题，简化了初始开发。在本文中，我们讨论了SRI开发工作的下一步，并提出了空间相移SRI WFS的设计。该设计允许在单个摄像机上同时捕获所有四个干涉图像-在参考光束和信号光束之间分别具有0，π/ 2，π和3π/ 2的相移。显示了该设计的实验室演示的初步结果。

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