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新的基于干涉技术和合成孔径处理的三维成像光谱。在整个研究过程中，我们搭建了一个实验系统来验证所提出的新方法及其物理基础。结果表明，将合成孔径技术应用于两轴波前折叠干涉仪测量的五维干涉图，可以恢复从光源传播的特定单色光分量的幅度和相位的空间分布。我们还发现，为了提高观测相位分布的精度，特别是为了缩短测量周期，开发一种高吞吐量的干涉测量系统是非常必要的。此外，还发明了一种新的方法，在不改变探测器位置的情况下获得交替干涉图。该方法还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，认为新方法可以提高吞吐量，简化干涉测量系统，以便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在各种多维干涉图中包含源信息。

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.