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

本研究的目的是从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技术。假设目标光源为多色且空间非相干的光源，占据一定的空间，在整个研究过程中，我们建立了一个实验系统来验证所提出的新方法及其物理基础。我们已经表明，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，可以通过应用所提出的合成孔径技术的二维波前折叠干涉仪测量的五维干涉图恢复。为了提高相位分布的测量精度，需要研制一种高通量的干涉测量系统，以缩短测量周期，并提出了一种不改变探测器位置而获得交替干涉图的新方法。对合成孔径技术进行了改进。从理论上验证了新方法的有效性，并认为新方法提高了系统的吞吐量，简化了干涉测量系统。为了系统地描述多维成像光谱学的物理基础，需要进一步研究各种多维干涉图中源信息是如何包含的。

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.