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Self-interferometric technique for visualization of phase patterns encoded onto a liquid-crystal display

机译:自干涉技术,用于可视化编码到液晶显示器上的相位模式

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摘要

We report a new self-interferometric technique for visualizing phase patterns that are encoded onto a phase-only liquid-crystal display (LCD). In our approach, the LCD generates both the desired object beam as well as the reference beam. Normally the phase patterns are encoded with a phase depth of 2pi radians, and all of the incident energy is diffracted into the first-order beam. However, by reducing this phase depth, we can generate an additional zero-order diffracted beam, which acts as the reference beam. We work at distances such that these two patterns spatially interfere, producing an interference pattern that displays the encoded phase pattern. This approach was used recently to display the phase vortices of helical Ince-Gaussian beams. Here we show additional experimental results and analyze the process.
机译:我们报告了一种新的自干涉技术,用于可视化被编码到仅相位液晶显示器(LCD)上的相位模式。在我们的方法中,LCD既生成所需的目标光束,又生成参考光束。通常,相位模式以2pi弧度的相位深度进行编码,并且所有入射能量都被衍射到一阶光束中。但是,通过减小该相位深度,我们可以生成一个附加的零阶衍射光束,该光束用作参考光束。我们在一定距离处工作,以使这两个模式在空间上相互干扰,从而产生显示编码相位模式的干扰模式。该方法最近用于显示螺旋Ince-Gaussian光束的相位涡。在这里,我们显示了其他实验结果并分析了过程。

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