数字全息变焦系统的研究及应用

从4f系统及照像机变焦镜头的设计思想出发,提出并设计了一个由三面透镜组成的数字全息变焦系统.该系统具有4f系统的性能,且可以方便地改变横向放大率,适应实际检测物体尺寸及形状的变化.用几何光学表述了变焦系统的工作原理,基于矩阵光学理论介绍了变焦系统的设计方法,利用衍射的角谱理论对像空间波面重构计算方法进行了介绍.并且,给出了实验证明及应用实例.

Application Research on the Zoom System of Digital Holography

Strat from the design iedas of 4f system and camera′s zoom lens,a digital holography zoom system consisted of three lens is proposed and designed.The system has the performance of 4f system,and its lateral magnification can be changed conveniently to adapt changes of actual measured object′s size and shape.The work principle of the zoom system using geometrical optics is introduced.Based on matrix optical theory and wavefront reconstruction calculation method of image space using diffraction′s angular spectrum theory,its design method is presented.At last,experimental demonstration and application example are given.