影响数字全息再现像像质的因素分析

详细地讨论了CCD的感光像元、抽样间隔和感光面积这三个结构参量对数字全息再现像的影响,并分析了结构参量之间的相互关系.结果表明,CCD的三个结构参量不仅分别影响着数字全息图再现像的亮度、大小和分辨率,同时还与记录光路相关联并相互影响.在CCD的结构参量、物体大小及记录波长都确定的情况下,设计了最佳全息记录光路,使CCD的带宽得到了充分利用,获取的信息量也达到了极限.通过综合归纳,给出了充分利用CCD结构参量进行高质量数字全息记录的建议,并进行了实验验证.

Analysis of the influencing factors on the reconstruction image of digital holograms

The influence of structural parameters of CCD including the size of the pixel,sampling interval and sensitive area on the reconstruction image of digital holograms is discussed,and the relations between them are analyzed.Such associating structural parameters interacting with the optical arrangement for recording the digital holograms,have influences on the brightness,the size and the resolution of the reconstruction image.Considering these influences,an optimal optical setup for recording high quality digital holograms is introduced,and corresponding experimental results are given.