{"title":"Spectrum characteristics of digital holograms illuminated with reference wave and its application","authors":"邱培镇 Qiu Peizhen, 庞. P. Tao","doi":"10.3788/GXJS20144004.0349","DOIUrl":null,"url":null,"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.","PeriodicalId":35591,"journal":{"name":"光学技术","volume":"40 1","pages":"349-352"},"PeriodicalIF":0.0000,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"光学技术","FirstCategoryId":"1089","ListUrlMain":"https://doi.org/10.3788/GXJS20144004.0349","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Physics and Astronomy","Score":null,"Total":0}
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.
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".
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