Kakue Takashi, Inoue Tomoyoshi, Shimobaba Tomoyoshi, Ito Tomoyoshi, Awatsuji Yasuhiro
J Opt Soc Am A Opt Image Sci Vis. 2022 Feb 1;39(2):A7-A14. doi: 10.1364/JOSAA.441585.
We propose a numerical simulation method of the hologram-recording process for light-in-flight recording by holography (LIF holography) based on fast Fourier transform (FFT) to improve the efficiency of the simulation. Because it is crucial to consider the difference in the optical-path length between the object and reference light pulses, we modify a point-spread function by considering the optical-path lengths of the object and reference light pulses and whether both pulses interfere with each other in LIF holography. The computational time was shortened by 5.5×10 times for the 4,096×4,096 resolution of the hologram using the proposed method. We evaluate the proposed method by calculating the root mean square error (RMSE) of the reconstructed holographic images. The RMSEs were relatively small considering the effect of speckle noise; these results effectively demonstrate the validity of the proposed method. Moreover, we reconstruct the moving pictures of light pulse propagation from the hologram generated by the proposed method. We compare the simulation and experimental results, and succeed in qualitatively demonstrating the validity of the proposed method.
我们提出了一种基于快速傅里叶变换（FFT）的用于飞行中光记录全息术（LIF全息术）的全息图记录过程的数值模拟方法，以提高模拟效率。由于考虑物光和参考光脉冲之间的光程差至关重要，因此我们通过考虑物光和参考光脉冲的光程长度以及两者在LIF全息术中是否相互干涉来修改点扩散函数。使用所提出的方法，对于4096×4096分辨率的全息图，计算时间缩短了5.5×10倍。我们通过计算重建全息图像的均方根误差（RMSE）来评估所提出的方法。考虑到散斑噪声的影响，RMSE相对较小；这些结果有效地证明了所提出方法的有效性。此外，我们从所提出方法生成的全息图重建光脉冲传播的动态图像。我们比较了模拟结果和实验结果，并成功地定性证明了所提出方法的有效性。
