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薄膜晶体管液晶显示器TFT-LCD是信息光学研究中一种非常重要的电寻址空间光调制器SLM。TFT—LCD像素之间导电沟道上不透明的金属掩膜的周期性分布形成矩形光栅,引起衍射,在光学信息处理中相邻衍射级间傅立叶谱的部分重叠,引起了相互干扰,这形成了TFT—LCD较好地用于信息光学研究的空间频率上限;理论分析表明,在谱平面,各衍射级的谱的相对分布是相同的。并通过联合变换实验加以证实。
Thin Film Transistor Liquid Crystal Display TFT-LCD is a very important electrical addressable spatial light modulator SLM in information optics research. The periodic distribution of the opaque metal mask on the conductive channel between the TFT-LCD pixels forms a rectangular grating that causes diffraction, partially overlapping the Fourier spectra between adjacent diffraction orders in the optical information processing, causing mutual interference which forms the TFT -LCD is better used for the upper limit of spatial frequency of information optics research. Theoretical analysis shows that the relative distribution of spectra in each diffraction order is the same in the spectral plane. And through the joint transformation experiment to be confirmed.