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报道了一种由聚合物分散液晶膜与具有周期性条状电极结构板结合的新型光栅器件。借助于聚合物分散液晶膜的电光特性，这种栅对入射光的散射或衍射取决于对其施加的电压，即它是电场可调的。实验结果显示出当驱动电压超过器件的阈值电压时，衍射光的强度和衍射斑的可见级次能被电场调制，而且它能把入射光的线性偏振态变为椭圆偏振态。
A new type of grating device consisting of a polymer dispersed liquid crystal film and a periodic strip electrode structure plate is reported. With the electro-optical properties of a polymer-dispersed liquid crystal film, the scattering or diffraction of such a gate with respect to incident light depends on the voltage applied to it, ie it is adjustable in electric field. The experimental results show that the intensity of the diffracted light and the visible order of the diffraction spot can be modulated by the electric field when the driving voltage exceeds the threshold voltage of the device, and that it can change the linear polarization state of the incident light to the elliptic polarization state.