Single-exposure phase-shifting digital holography using a random-complex-amplitude encoded reference wave

提出了一种改进的采用随机相位参考波的单次曝光相移数字全息术。改进了求取目标波复振幅的算法。在该算法中，参考波不是随机相位，而是随机复幅度。因此，该算法使用了适当的参考波的幅度信息。在此基础上，实验研究了随机复幅度编码参考波在单次曝光相移数字全息中的合适参考波。虽然参考波是广义的，但重建图像的质量取决于它。当参考波满足一定条件时，这种方法不能获得重建图像。在给出了确定的条件后，利用散斑性质研究了合适的条件。给出了实验结果，验证了该方法的有效性。

The improved single-exposure phase-shifting digital holography using a random-phase reference wave is proposed. The algorithm for obtaining a complex amplitude of an object wave is improved. In the proposed algorithm, the reference wave is treated as not a random-phase but a random-complex-amplitude. Therefore, the algorithm uses proper amplitude information of the reference wave. Furthermore, the appropriate reference wave in single-exposure phase-shifting digital holography using a random-complex- amplitude encoded reference wave is experimentally investigated. Although the reference wave is generalized, the quality of reconstructed images depends on it. When the reference wave satisfies a certain condition, reconstructed images cannot be obtained in this method. After the certain condition is presented, the appropriate condition is studied using a speckle property. Experimental results are given to confirm the proposed method.