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研究以球面波为参考光时体全息图的相对衍射效率问题，从理论计算中发现，当以球面波为参考光时，体全息图的串扰（ｃｒｏｓｓ－ｔａｌｋ）性能比用平面波时要略好一些，文章对此进行了分析解释并给出了实验验证。根据分析及实际读出的存储图像，发现球面参考光相对于平面参考光也不引起像质退化。这些特性表明了体全息存储器对于参考光平行度调节的要求并不十分严格。此外，文章还给出了以球面波为参考光时体全息图相对衍射效率的近似解析计算公式。
The relative diffraction efficiency of volume hologram with spherical wave as reference light is studied. From the theoretical calculation, it is found that the cross-talk performance of volume hologram is slightly better than that of plane wave when using spherical wave as reference light , The article analyzes and explains this and gives experimental verification. Based on the analysis and actual reading of stored images, it was found that the spherical reference light does not cause deterioration of the image quality with respect to the plane reference light. These characteristics indicate that the requirement of volume holographic memory for reference light parallelism adjustment is not very strict. In addition, the article also gives an approximate analytic formula for the relative diffraction efficiency of a volume hologram with a spherical wave as a reference light.