纯位相信息自聚焦计算全息匹配滤波器

本文介绍一种用计算全息方法制作的纯位相信息自聚焦匹配滤波器。它在编码时取滤波函数的振幅为１，仅对位相进行编码；并通过对傅里叶谱加入二次位相因子代替傅里叶透镜，使其具有自聚焦功能。与常规的方法（光学全息法或计算全息法）所获得的匹配滤波器相比较，具有原理上更合理，滤波器的制作和匹配光路更简单，也更容易实现匹配等特点。所得到的匹配实验结果也很清晰，这与理论是完全符合的。

Only-phase information self-focusing matching filter by computer generated hologram

A only phase information self focusing matching filter by computer generated hologram is presented in this paper. The filter is obtained by making the amplitude for filter function equate to 1 and only encoding the phase. It possesses self focusing function through adding quadratic phase factors into conjugate frequency spectrum of object instead of Fourier lens. Compared with traditional method filter ( produced by optical holography or computer hologram), the only phase information self focusing matching filter is more reasonable and producing is more simple and optical configuration becomes more compact and matching is more easy. The experimental results is clear and is fit for the theory.