几种全息透镜阵列PS互连方式的成像分析

Imaging analyzing for some PS optical interconnection fashions using holographic lens array

2× 2全息透镜阵列可以采用平行光输入的虚焦点、实焦点方法和发散光输入等方式获得输入的PS变换 ,本文主要对以上三种方式的成像进行了比较和分析。分析表明 ,由于平行光输入时元素边缘存在衍射 ,引起成像边缘的模糊 ;证明了虚焦点成像系统不能消除成像的模糊 ,而当输入的黑白透明胶片处于uH=( 1-1/2N)fH 时 ,实焦点成像系统可消除成像边缘的模糊。分析具有普遍的意义 。

holographic lens array may be used for PS optical interconnection under the following cases:Virtual focus imaging,real focus imaging under parallel light illumination and for the divergent light illumination.This paper compared and analyzed above three imaging fashions.The analysis declared that,owing to the diffraction of the element edge under parallel light illumination,the image edge obscurity was produced.Then we proved:the edge obscurity could not be eliminated by virtual focus system,while the real focus imaging system could resolve this problem when the black and white transparence film was situated at u H=(1-1/2N)f H.The analysis was common to solve the similar question and the result of experiment proved our theory.