Three Dimensional Deformation Measurements with Digital Holography

2009 2nd International Congress on Image and Signal Processing Pub Date : 2009-10-30 DOI:10.1109/CISP.2009.5304345

Zhenjie Fan, Haojun Pang, Wensheng Wang, Chengda Ning, Fei Guo

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引用次数: 3

Abstract

Digital holography is a kind of optical information processing technology with digital method. It is a combination of traditional holography and modern electronic technology. By the way of recording and processing the holographic image by digital method, it is not adopted the traditional holographic photographic way of chemical processing, so that the processing is simplified. It is also convenient to improve the quality of the image and to extract the needed information by digital image processing. In this paper, charged coupled device (CCD) has been applied to holographic interferometry combined with electrical addressable liquid crystal display (EALCD), which adds new content and method to the development and application of holography. On the basis of theory analysis, a new method that combined image plane hologram with doubleexposure holographic interferometry, and combined CCD with EALCD is used in three dimensional deformation measurements. This method has been improved feasible by optical experiment. Keywords-digital holography; CCD; EALCD; deformation measurement; digital image processing; image plane holography

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三维变形测量与数字全息

数字全息是一种采用数字方法的光学信息处理技术。它是传统全息术和现代电子技术的结合。通过数字方法对全息图像进行记录和处理，不采用传统的全息摄影方式进行化学处理，从而简化了处理过程。通过数字图像处理，也便于提高图像质量和提取所需信息。本文将电荷耦合器件(CCD)与电可寻址液晶显示器(EALCD)结合应用于全息干涉测量，为全息技术的发展和应用增添了新的内容和方法。在理论分析的基础上，提出了像平面全息与双曝光全息干涉相结合、CCD与EALCD相结合的三维变形测量方法。通过光学实验证明了该方法的可行性。Keywords-digital全息术;CCD;EALCD;变形测量;数字图像处理;成像平面全息术

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2009 2nd International Congress on Image and Signal Processing

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