用作图法求全息再现像

本文从物理光学的角度出发，给出两条特殊光线，可用作图法找到全息图再现的原始像和共轭像的位置，定义参考光源与物点的联线为主轴，主轴与全息图的交点为节点。两条特殊光线一条是沿再现照明光源与节点联线方向，称之为不偏折光线。另一条对原始像来说是自照明光发出通过参考光源的一条光线，这条光线经全息图衍射后与不偏折光线的交点即原始像点的位置；对共轭像来说是自照明光源发出通过物点的一条光线，这条光线经全息图衍射后与不偏折光线的交点即共轭像点的位置。

Diagramming Method for Finding Reconstruction Image of Holograms

In this paper,the original and conjugated images of a hologram could be found by dia-gramming with two special rays.We have analysed two rays from view of photology. The link line be-tween the object point and the reference source was defined as main axis. The junction point of the main axis and the hologram was the panel point.One of two special rays along with direction of link line be-tween the illumination source and the panel point was called as a non-deflection ray. Another ray,pass-ing through the reference source from the illumination source,was diffracted by the hologram,and then,the ray intersected with the non-deflection ray,the intersection point was the position of a origi-nal image. For a conjugated image,a ray,passing through the object point from the illuminationsource,was diffracted by the hologram,and then,the ray intersected with the non-deflection ray,the intersection point was the position of a conjugated image.