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Enhancing the phase profile and contrast of an interferogram by polarization recording in bacteriorhodopsin

机译:通过细菌视紫红质的极化记录增强干涉图的相图和对比度

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摘要

Interferometry is a technique for reconstructing the profiles of phase objects. We present a novel interferometric setup for generating interferograms with doubled phase profile and enhanced contrast compared with the standard interferogram. The proposed system consists of a two-beam interferometer in which the reference and test waves are circularly polarized orthogonally to each other. They are superposed upon a bacteriorhodopsin film, creating a polarization grating that is distorted by the phase of the test object. This polarization pattern is read by a polarized He-Ne beam. We show analytically and experimentally that, when the zero diffraction order is removed, an interferogram with doubled phase profile and enhanced contrast is obtained.
机译:干涉测量法是一种用于重建相位对象轮廓的技术。与标准干涉图相比,我们提出了一种新颖的干涉仪设置,用于产生相位图加倍且对比度增强的干涉图。所提出的系统由两束干涉仪组成,其中参考波和测试波彼此正交地圆偏振。它们被叠加在细菌视紫红质膜上,形成了一个偏振光栅,该偏振光栅会因测试对象的相位而失真。该偏振图案由偏振的He-Ne光束读取。我们通过分析和实验表明,去除零衍射级后,可获得具有双相轮廓和增强对比度的干涉图。

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  • 来源
    《Optics Letters》 |2003年第16期|共3页
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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
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