Spectrum characteristics of digital holograms illuminated with reference wave and its application

Q4 Physics and Astronomy

光学技术 Pub Date : 2014-01-01 DOI:10.3788/GXJS20144004.0349

邱培镇 Qiu Peizhen, 庞. P. Tao

引用次数: 0

Abstract

A method is proposed to extract the angle of reference wave and simplify the process of the filter design in digital reconstruction of off-axis hologram.The spectrum characteristics of the off-axis digital holograms illuminated with reference wave are analyzed.Firstly,the digital hologram is multiplied with computer simulated reference wave.Secondly,it is used to do fast Fourier transform and the spectrum is obtained.It is found that without the extra spectra-shift process,the spectrum of the real image always appears in the center of the spectrum plane and never shifts.According to this feature,the optimal angle of the simulated reference wave is obtained,and the process of filter structure design can be simplified.Based on the filter technique,the zero-order and conjugate image in the reconstructed image of off-axis digital holography is eliminated,and the contrast and the details of the reconstructed real image are improved.The theoretical analysis and experimental results are analyzed.

查看原文本刊更多论文

参考波照射数字全息图的光谱特性及其应用

提出了一种在离轴全息图数字重建中提取参考波角度和简化滤波器设计过程的方法。分析了参考波照射离轴数字全息图的光谱特性。首先，将数字全息图与计算机模拟的参考波相乘。其次，对信号进行快速傅里叶变换，得到信号的频谱;结果表明，在没有额外的光谱移位过程的情况下，实像的光谱始终出现在光谱平面的中心，不会发生移位。根据这一特点，得到了模拟参考波的最佳角度，简化了滤波器结构的设计过程。基于滤波技术，消除了离轴数字全息重建像中的零阶像和共轭像，提高了重建实像的对比度和细节。对理论分析和实验结果进行了分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

光学技术 Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

0.60

自引率

0.00%

发文量

6699

期刊介绍： The predecessor of Optical Technology was Optical Technology, which was founded in 1975. At that time, the Fifth Ministry of Machine Building entrusted the School of Optoelectronics of Beijing Institute of Technology to publish the journal, and it was officially approved by the State Administration of Press, Publication, Radio, Film and Television for external distribution. From 1975 to 1979, the magazine was named Optical Technology, a quarterly with 4 issues per year; from 1980 to the present, the magazine is named Optical Technology, a bimonthly with 6 issues per year, published on the 20th of odd months. The publication policy is: to serve the national economic construction, implement the development of the national economy, serve production and scientific research, and implement the publication policy of "letting a hundred flowers bloom and a hundred schools of thought contend".