On the basis of CGH, it can encode two objects simultaneously by adding negative quadratic phase factor on the conjugate Fourier spectrum of one object and adding positive quadratic phase factor on the Fourier spectrum of the other.

• 它是在计算全息的基础上 ,通过对两个物的傅里叶谱或共轭谱分别加正的或负的二次相位因子 ,求和后进行编码、制图、缩微而得 ,该滤波器可以分别对两个物实现匹配。