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

基于合成孔径技术的数字多光谱全息原理验证及首次图像采集

基本信息

批准号：
15360024
负责人：
YOSHIMORI Kyu
金额：
$ 9.6万
依托单位：
IWATE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

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.

本研究的目的是从理论上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。目标光源占据一定的空间，被假设为多色且空间不相干。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，通过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，可以检索从光源传播的光波的某些单色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，特别需要开发一种高通量干涉测量系统来缩短测量周期。除了上述结果之外，还发明了一种新方法来获得替代方案无需改变探测器位置即可获得干涉图。新方法还对合成孔径技术进行了修改。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。为了系统地描述多维成像光谱的物理基础，还需要进一步研究源信息如何包含在多维成像光谱中。各种多维干涉图。