Double frequency grating lateral shear interferometer.
Double frequency grating lateral shear interferometer.
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DOI：
10.1364/ao.12.002057
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发表时间：
1973-09
期刊：
影响因子：
1.9
通讯作者：
J. Wyant
中科院分区：
文献类型：
--
作者：
J. Wyant
本文介绍一种简单的光栅横向剪切干涉仪，它可以同时给出两个正交方向上具有剪切的干涉图。通过一个可以很容易地全息产生的双频交叉衍射光栅在一个平面内产生两个正交方向的剪切。横向平移光栅导致干涉图的辐照度随时间正弦变化，使得干涉仪能够与实时外差相位检测一起使用。
A simple grating lateral shear interferometer is described that can be made to give simultaneously two interferograms having shear in two orthogonal directions. The shear for the two orthogonal directions is produced in one plane by one double frequency crossed diffraction grating that can easily be produced holographically. Translating the grating sideways causes the irradiance of the interferogram to vary sinusoidally with time enabling the interferometer to be used with real-time heterodyne phase detection.