Imaging of transparent phase samples using a wire grid polarizer (WGP)-based shearing interferometer is demonstrated. The proposed setup employs a WGP as a beam splitter in a triangular cyclic interferometer setup, so that the two counterpropagating beams are rendered linearly polarized in orthogonal directions as they emerge from the interferometer. These sheared waved fronts are made to pass through the phase sample. The magnitude of shear is affected by controlled angular shifts of one mirror about the reference X and Y axes. For each of these directional shears, the polarization phase shifting is implemented so as to generate a three-dimensional phase pattern, which is digitally combined and integrated to yield the sample phase. The proposed setup is robust, sufficiently tolerant to ambient vibrations, and shows very encouraging experimental results.

中文翻译：

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基于线栅偏振器的具有偏振相移的循环剪切干涉仪

演示了使用基于线栅偏振器 (WGP) 的剪切干涉仪对透明相位样品进行成像。所提出的设置在三角形循环干涉仪设置中使用 WGP 作为分束器，以便两个反向传播的光束在从干涉仪出现时在正交方向上呈现线性偏振。使这些剪切波前通过相位样本。剪切的大小受一个反射镜围绕参考 X 轴和 Y 轴的受控角位移的影响。对于这些定向剪切中的每一个，实施极化相移以生成三维相位模式，该模式被数字组合和集成以产生样本相位。所提出的设置是稳健的，对环境振动有足够的耐受性，