The reference light is slant and parallel when the complex filter is being built for VLC. We design a optical recognition 2f+p system whose complex filter contains quadratic phase term.

• 我们设计的复数滤波器带二次位相因子的光学相关识别 2f+p系统 ,在制作复数滤波器时 ,参考光是一束倾斜入射的会聚光 ,使复数滤波器包含一个二次位相因子 ;