重建像质量的优劣是衡量数字全息成像最主要的标准。针对影响重建像质量的三个主要因素：参物角、CCD像素间距和再现距离,采用离轴全息记录与菲涅尔衍射近似重建算法对数字全息记录与再现过程进行了模型仿真,系统地探讨了各个因素对重建像质量的影响。通过仿真和分析获得了CCD像素间距和再现距离的参数范围以及参物角最大允许值,为具体实验验证提供了理论依据和操作指导。仿真实验结果表明,只有当参物角在最大允许值以内,选取合适的CCD像素间距和再现距离参数才能再现出清晰的重建物像。

The quality of reconstructed images is the main standard for measuring the digital holographic imaging. For the three main afecting factors such as referenceobject angle,CCD pixel pitch and the reconstruction distance,it is processed model simulation for the digital holographic recording and reconstruction by using offaxis holographic record and Fresnel diffraction approximation reconstruction algorithm,and their impacts on the quality of reconstructed image were discussed systematically. The parameter range of CCD pixel pitch,reconstruction distance and the maximum allowable value of referenceobject angle were obtained by simulation and analysis,which provides theoretical basis and operation instruction for specific experiments. The simulation experimental results show that clear reconstructed images can be obtained as long as the referenceobject angle is within the maximum allowable value and the CCD pixel pitch and reconstruction distance parameters are in appropriate ranges.