商用扭曲液晶显示器的空间幅度和相位调制
Spatial amplitude and phase modulation using commercial twisted nematic LCDs
摘要：
提出了一种利用扭曲液晶显示器结合空间滤波器实现激光束全空间相位和幅度控制的方法。通过空间滤波，我们将四个相邻像素组合成一个超像素。在每个超像素处，我们能够独立地调制光的相位和振幅。我们实验证明了独立的相位和振幅调制使用这种新技术。我们的技术不对空间光调制器施加特殊要求，并且即使使用不完美的调制器也可以精确控制场。
英文摘要：
We present a method for full spatial phase and amplitude control of a laser beam using a twisted nematic liquid crystal display combined with a spatial filter. By spatial filtering we combine four neighboring pixels into one superpixel. At each superpixel we are able to independently modulate the phase and the amplitude of light. We demonstrate experimentally the independent phase and amplitude modulation using this novel technique. Our technique does not impose special requirements on the spatial light modulator and allows precise control of fields even with imperfect modulators.
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