Development of Low Coherence Digital Holography Based on Single-Exposure Phase-Shifting Digital Holography

提出了用低相干数字全息法测量轮廓和反射率的方法。利用低相干数字全息术记录的若干数字全息图，计算了物体的轮廓和反射率。我们称数字全息图中的重建图像为一系列重建图像。最高点对应于作为最大像素值的重构图像的序列数。配置文件从数字中获取。反射率属性对应于每个重构图像中相同位置的最大像素值。为了提高测量精度，我们提出了降低噪声影响的方法。在提出的方法中，斑点的影响是主要的。为了减小误差，提出了统计方法和利用光源波长分布的方法。应用所提出的方法，提高了测量的精度。此外，对物体在散射介质中的测量结果也证实了我们提出的方法。针对单镜头移相方法，提出了两种波前分裂移相数字全息技术。一种是使用分析器阵列的方法，另一种是使用缓速器阵列的方法。仿真实验结果证实了该方法的有效性。利用偏振成像相机进行实验，实现了移相数字全息图的一次记录。

Measurement of a profile and reflectance property using low-coherence digital holography has been proposed. A number of digital holograms recorded by a low-coherence digital holography are used to calculate the profile and reflectance property of the object. We call the reconstructed images from the digital holograms, series of reconstructed images. The highest point corresponds to the number of series of the reconstructed images which as maximum pixel value. The profile is obtained from the numbers. The reflectance property corresponds the maximum pixel value for same position in each reconstructed images. To improve the accuracy of the measurement, we propose reduction of noise effect. In the proposed methods, the effect of speckles is dominant. To reduce it, statistical methods and the method by the wavelength profile of a light source are presented. By applying the proposed methods, the accuracy of measurement has been improved. Furthermore, the measurement of the object within the scattering media has been shown to confirm our proposed method.For the one-shot phase-shifting method, two types of wavefront-splitting phase-shifting digital holography have been proposed. One is the method using an analyzer array and another is the method using a retarder array. Simulational experimental results are shown to confirm the one-shot phase-shifting digital holography using an analyzer array. By the experiments using a polarization imaging camera, the one-shot recording of the phase-shifting digital hologram has been accomplished.