Principle Verification and First Image Acquisition of Digital Multispectral Holography based on Synthetic Aperture Technique

本研究的目的是在理论和实验上实现一种基于干涉技术和合成孔径处理的新型三维成像光谱学。假定占据一定空间的目标光源是多色的、空间不相干的。在整个研究过程中，我们建立了一个实验系统来验证新提出的方法及其物理基础。我们已经证明，将所提出的合成孔径技术应用于用两轴波前折叠干涉仪测量的五维干涉图，可以获得从光源传播的光波的某些单色分量的振幅和相位的空间分布。我们还发现，为了提高观测相位分布的精度，特别是需要开发高通量干涉测量系统来缩短测量周期。在此基础上，提出了一种在不改变探测器位置的情况下获得替代干涉图的新方法。同时对合成孔径技术进行了改进。从理论上验证了新方法的性能，并认为新方法可以提高通过率，简化干涉测量系统。为了系统地描述多维成像光谱的物理基础，还需要进一步研究如何将源信息包含在各种多维干涉图中。

The purpose of this research is to accomplish, both theoretically and experimentally, a new three-dimensional imaging spectroscopy based on interferometric technique and synthetic aperture processing. The target light source, occupying certain part of space, is assumed to be polychromatic and spatially incoherent.Throughout the period of research, we have built up an experimental system to verify new proposed method and its physical basis. We have shown that spatial distributions of amplitude and phase of certain monochromatic component of optical wave propagated from light source, can be retrieved by applying proposed synthetic aperture technique to a five-dimensional ingterferogram measured with two-axes wave-front folding interferometer. We also found that, for improving the accuracy of observed phase distribution, in particular, it is desirable to develop a high through-put interferometric measurement system to shorten the measurement period.In addition to above results, a novel method was invented to obtain alternative interferograms without changing detector position. The synthetic aperture technique is also modified for the new method. The performance of the new method was verified theoretically, and the new method is considered to improve the through put, and to simplify the interferometric measurement systemFor systematic description of physical basis of multidimensional imaging spectroscopy, further investigation is required for how source information is included in a variety of multidimensional interferograms.