Pub Date : 2014-01-01DOI: 10.3788/CO.20140704.0631
白玉琢 Bai Yu-zhuo, 木. M. Rui, 马琳 Ma Lin, 贾钰超 Jia Yu-chao, 普群雁 Pu Qun-yan, 薛经纬 Xue Jing-wei
A mid-wavelength infrared optical system with super-long focal length and dual field-of-view is designed in this paper. Based on the re-image configuration,this system can realize the zoom by axial motion of a lens along the optical axis. The design results show that this system realizes the zoom with a super-long focal length of 600- 1 500 mm,and the MTF of the central view is more than 0. 5 at the characteristic frequency of20 lp /mm of detector,which shows its optical performance approximates to the diffraction limit. This system can meet the requirement of military investigation for seeking and aiming at target in a long distance.
{"title":"Design of infrared optical system with super-long focal length and dual field-of-view","authors":"白玉琢 Bai Yu-zhuo, 木. M. Rui, 马琳 Ma Lin, 贾钰超 Jia Yu-chao, 普群雁 Pu Qun-yan, 薛经纬 Xue Jing-wei","doi":"10.3788/CO.20140704.0631","DOIUrl":"https://doi.org/10.3788/CO.20140704.0631","url":null,"abstract":"A mid-wavelength infrared optical system with super-long focal length and dual field-of-view is designed in this paper. Based on the re-image configuration,this system can realize the zoom by axial motion of a lens along the optical axis. The design results show that this system realizes the zoom with a super-long focal length of 600- 1 500 mm,and the MTF of the central view is more than 0. 5 at the characteristic frequency of20 lp /mm of detector,which shows its optical performance approximates to the diffraction limit. This system can meet the requirement of military investigation for seeking and aiming at target in a long distance.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89044804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140702.0245
王. W. Xu, 王挺峰 Wang Ting-feng, 王弟男 Wang Di-nan, 王化龙 Wang Hua-long
{"title":"Rapid synchronization technology for wireless optical link","authors":"王. W. Xu, 王挺峰 Wang Ting-feng, 王弟男 Wang Di-nan, 王化龙 Wang Hua-long","doi":"10.3788/CO.20140702.0245","DOIUrl":"https://doi.org/10.3788/CO.20140702.0245","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83558844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140701.0118
Xue Bin, Kong Xiang-gui, Wang Dan, Xia Lu
Surface enhanced Raman spectroscopy( SERS) is an ultrasensitive vibrational spectroscopic technique to detect molecules. At present,adding salts is a main way to induce nanoparticles aggregation to get giant enhancement. However,this method needs more procedures and salts may etch nanoparticles. Here an effective and simple method is reported to enhance SERS effect by the aggregation of silver nanoprisms( AgNPRs) induced by 785 nm laser. Silver nanoprisms were prepared by ligand-assisted chemical reductions method. AgNO 3 were reduced by NaBH 4 in the presence of trisodium citrate,poly( vinylpyrrolidone) and H 2 O 2. The edge of silver nanoprisms is about 80 nm. Surface plasmon band of silver nanoprisms is around 774 nm which could effectively absorb 785 nm laser. When laser irradiating silver nanoprisms during the detection of Raman spectra,these nanoprisms gradually aggregated and SERS spectra of analytes( 4-mercaptobenzoic acid,4-MBA) were gradually enhanced. And enhancement factor of Raman spectra ~ 109is obtained by this method. Due to the huge magnitude of SERS in the near infrared region( excitation wavelength 785 nm),this technique has the potential in the field of biochemical tests.
{"title":"SERS effect of aggregation of silver nanoprisms induced by 785 nm laser","authors":"Xue Bin, Kong Xiang-gui, Wang Dan, Xia Lu","doi":"10.3788/CO.20140701.0118","DOIUrl":"https://doi.org/10.3788/CO.20140701.0118","url":null,"abstract":"Surface enhanced Raman spectroscopy( SERS) is an ultrasensitive vibrational spectroscopic technique to detect molecules. At present,adding salts is a main way to induce nanoparticles aggregation to get giant enhancement. However,this method needs more procedures and salts may etch nanoparticles. Here an effective and simple method is reported to enhance SERS effect by the aggregation of silver nanoprisms( AgNPRs) induced by 785 nm laser. Silver nanoprisms were prepared by ligand-assisted chemical reductions method. AgNO 3 were reduced by NaBH 4 in the presence of trisodium citrate,poly( vinylpyrrolidone) and H 2 O 2. The edge of silver nanoprisms is about 80 nm. Surface plasmon band of silver nanoprisms is around 774 nm which could effectively absorb 785 nm laser. When laser irradiating silver nanoprisms during the detection of Raman spectra,these nanoprisms gradually aggregated and SERS spectra of analytes( 4-mercaptobenzoic acid,4-MBA) were gradually enhanced. And enhancement factor of Raman spectra ~ 109is obtained by this method. Due to the huge magnitude of SERS in the near infrared region( excitation wavelength 785 nm),this technique has the potential in the field of biochemical tests.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89756473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/co.20140706.0931
刘春旭 Liu Chun-xu
{"title":"Synthesis and luminescence properties of La1.6(MoO4)3∶Eu3+0.4nanocrystal","authors":"刘春旭 Liu Chun-xu","doi":"10.3788/co.20140706.0931","DOIUrl":"https://doi.org/10.3788/co.20140706.0931","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75203136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The main technical parameters and the zoom method for the camera with small size and large zoom ratio are introduced. Each structural part of the camera is described in detail. The zoom and compensating lens group slide in the main body through the slide frame,whose movements are assured by the movement of the guide pin in the cam curve groove. The measures to ensure the quality and the precision taken in the process and assembling of the camera are expatiated. The clearance between cam curve groove and roller is controlled about 6 ~ 9 μm,and the stiffness and column of the main body are insured. The return errors are less than 2″ when the zoom and compensation slide frame slide in the main body. The ratio between diameter and length of the slide frame should be no less than 1. The results show that optical transfer function of the camera is more than 0. 2 in the space frequency of 50 lp / mm after high-and-low temperature vibration tests, and the location images of camera are clear.
{"title":"Structural realization of small zoom camera","authors":"苗健宇 Miao Jian-yu, 张立平 Zhang Li-ping, 翟岩 Zhai Yan, 梅. M. Gui","doi":"10.3788/CO.20140701.0169","DOIUrl":"https://doi.org/10.3788/CO.20140701.0169","url":null,"abstract":"The main technical parameters and the zoom method for the camera with small size and large zoom ratio are introduced. Each structural part of the camera is described in detail. The zoom and compensating lens group slide in the main body through the slide frame,whose movements are assured by the movement of the guide pin in the cam curve groove. The measures to ensure the quality and the precision taken in the process and assembling of the camera are expatiated. The clearance between cam curve groove and roller is controlled about 6 ~ 9 μm,and the stiffness and column of the main body are insured. The return errors are less than 2″ when the zoom and compensation slide frame slide in the main body. The ratio between diameter and length of the slide frame should be no less than 1. The results show that optical transfer function of the camera is more than 0. 2 in the space frequency of 50 lp / mm after high-and-low temperature vibration tests, and the location images of camera are clear.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73031772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140703.0389
王永红 Wang Yong-hong, 李骏睿 Li Jun-rui, 孙剑飞 Sun Jian-fei, 刘佩 Liu Pei, 杨连祥 Yang Lian-xiang
In order to solve the problem of serious influence of much noise in the phase fringe patterns of digital speckle pattern interferometry on the result and accuracy of phase unwrapping,an effective method of stripe sine / cosine decomposition combined with frequency domain low-pass filtering is introduced in this paper,and the high precision filter of phase fringe patterns of digital speckle pattern interferometry is realized. Basic idea of this method is that phase fringe patterns is mapped into two patterns by the sine / cosine function before the phase image filter processing,and then is synthesized into phase fringe patterns through frequency domain filter. This decomposition frequency domain filtering method can retention phase jump information effectively when filtering. Experimental results show that compared with the traditional image noise reduction method,this method can filter out the speckle noise in images better on the basis of reserving "rush"image information,and it is simple and effective,which solves the problem of loss from 10% to 40% for phase fringe patterns gray level information when traditional filtering methods are used in stripe phase fringe patterns.
{"title":"Frequency domain filtering for phase fringe patterns of digital speckle pattern interferometry","authors":"王永红 Wang Yong-hong, 李骏睿 Li Jun-rui, 孙剑飞 Sun Jian-fei, 刘佩 Liu Pei, 杨连祥 Yang Lian-xiang","doi":"10.3788/CO.20140703.0389","DOIUrl":"https://doi.org/10.3788/CO.20140703.0389","url":null,"abstract":"In order to solve the problem of serious influence of much noise in the phase fringe patterns of digital speckle pattern interferometry on the result and accuracy of phase unwrapping,an effective method of stripe sine / cosine decomposition combined with frequency domain low-pass filtering is introduced in this paper,and the high precision filter of phase fringe patterns of digital speckle pattern interferometry is realized. Basic idea of this method is that phase fringe patterns is mapped into two patterns by the sine / cosine function before the phase image filter processing,and then is synthesized into phase fringe patterns through frequency domain filter. This decomposition frequency domain filtering method can retention phase jump information effectively when filtering. Experimental results show that compared with the traditional image noise reduction method,this method can filter out the speckle noise in images better on the basis of reserving \"rush\"image information,and it is simple and effective,which solves the problem of loss from 10% to 40% for phase fringe patterns gray level information when traditional filtering methods are used in stripe phase fringe patterns.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72667626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140705.0749
石. S. Lei, 许永森 Xu Yong-sen, 刘福贺 Liu Fu-he
{"title":"Development and application of beryllium mirrors in optical systems","authors":"石. S. Lei, 许永森 Xu Yong-sen, 刘福贺 Liu Fu-he","doi":"10.3788/CO.20140705.0749","DOIUrl":"https://doi.org/10.3788/CO.20140705.0749","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73724000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140701.0098
郑贤良 Zheng Xian-liang, 刘瑞雪 Liu Rui-xue, 夏明亮 Xia Mingliang, 曹召良 Cao Zhao-liang, 宣. X. Li
In order to realize high resolution retinal imaging,the technique of Liquid Crystal Adaptive Optics( LC-AO) and its utilize in retinal imaging is under investigation. Problems are settled in the research such as energy loss by polarization,limitation on field of view( FOV) and universality of LC-AO system in retinal imaging. Open-loop adaptive optics system is introduced to avoid the energy loss by polarization in closed-loop system. View field of imaging system is expanded by adhibition of an alterable diaphragm. Exposure ratio is reduced by a pulsed light source. Illumination is polarized to increase energy efficiency. Trial lens and dynamic,advanced target at infinite are used to increase the stability of pupil and reduce the impact of individual differences on human-eyes. Definition and contrast of images after correction are remarkably increased. FOV is enhanced from 200 μm to 500 μm. Exposure ratio is reduced to 1 /2 ~ 1 /3. High definition images are taken from samples with low resolution before. Most problems of LC-AO system for high resolution retinal imaging are settled.
{"title":"Retinal correction imaging system based on liquid crystal adaptive optics","authors":"郑贤良 Zheng Xian-liang, 刘瑞雪 Liu Rui-xue, 夏明亮 Xia Mingliang, 曹召良 Cao Zhao-liang, 宣. X. Li","doi":"10.3788/CO.20140701.0098","DOIUrl":"https://doi.org/10.3788/CO.20140701.0098","url":null,"abstract":"In order to realize high resolution retinal imaging,the technique of Liquid Crystal Adaptive Optics( LC-AO) and its utilize in retinal imaging is under investigation. Problems are settled in the research such as energy loss by polarization,limitation on field of view( FOV) and universality of LC-AO system in retinal imaging. Open-loop adaptive optics system is introduced to avoid the energy loss by polarization in closed-loop system. View field of imaging system is expanded by adhibition of an alterable diaphragm. Exposure ratio is reduced by a pulsed light source. Illumination is polarized to increase energy efficiency. Trial lens and dynamic,advanced target at infinite are used to increase the stability of pupil and reduce the impact of individual differences on human-eyes. Definition and contrast of images after correction are remarkably increased. FOV is enhanced from 200 μm to 500 μm. Exposure ratio is reduced to 1 /2 ~ 1 /3. High definition images are taken from samples with low resolution before. Most problems of LC-AO system for high resolution retinal imaging are settled.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73901009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fiber Bragg grating sensor is a new kind of sensor,which has a very broad application prospect.The main obstacle to limit its wide application is signal demodulation. So the sensing signal demodulation for fiber Bragg grating is one of the key technologies for fiber Bragg grating sensor applications. The reported signal demodulation methods of fiber Bragg grating sensor are reviewed and classified into edge filter demodulation method,matched filter method,tunable filter method,tunable narrowband laser interrogation method,radio frequency signal measurement method,chirped FBG method,CCD measurement method,and interference method. The principle of various methods and some improved methods are elaborated,and their advantages and disadvantages are analyzed. Finally the demodulation technology for the development of fiber Bragg grating sensing signal is discussed.
{"title":"Research progress in signal demodulation technology of fiber Bragg grating sensors","authors":"吴晶 Wu Jing, 吴晗平 Wu Han-Ping, 黄俊斌 Huang Jun-bin, 顾宏灿 Gu Hongcan","doi":"10.3788/CO.20140704.0519","DOIUrl":"https://doi.org/10.3788/CO.20140704.0519","url":null,"abstract":"Fiber Bragg grating sensor is a new kind of sensor,which has a very broad application prospect.The main obstacle to limit its wide application is signal demodulation. So the sensing signal demodulation for fiber Bragg grating is one of the key technologies for fiber Bragg grating sensor applications. The reported signal demodulation methods of fiber Bragg grating sensor are reviewed and classified into edge filter demodulation method,matched filter method,tunable filter method,tunable narrowband laser interrogation method,radio frequency signal measurement method,chirped FBG method,CCD measurement method,and interference method. The principle of various methods and some improved methods are elaborated,and their advantages and disadvantages are analyzed. Finally the demodulation technology for the development of fiber Bragg grating sensing signal is discussed.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85749927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To overcome the limitations of inertia weight adjustment mechanism when the particle swarm optimization algorithm is applied to object tracking,an improved particle swarm optimization object tracking algorithm is proposed. Firstly,the object and the parameters in particle swarm optimization algorithm are initialized. Secondly,the inertia weight adjustment mechanism is improved by using the evolution rate of particle,and the inertia weight is achieved by taking the conditions of different particles in each generation into consideration. Then the speed,the position,the individual optimum and the global optimum of the particles are updated simultaneously while the next iteration is proceeding. Finally,the area which has the largest similarity function value is defined as the object by comparing the fitness value of each particle with the others. Experimental results indicate that the method reduces the iterations to obtain the same fitness value,and improves the operation efficiency by 42. 9% in comparison with the particle swarm optimization object tracking method which uses self-adapted inertia weight adjustment mechanism. The accurate positioning of the object is a-chieved in the case of the similarity function presenting "multimodal",and the method is well adapted to the situation when partial occlusion occurs in object tracking.
{"title":"Object tracking method based on improved particle swarm optimization","authors":"郭巳秋 Guo Si-qiu, 许廷发 Xu Ting-fa, 王洪庆 Wang Hong-qing, 张一舟 Zhang Yi-zhou, 申子宜 Shen Zi-yi","doi":"10.3788/CO.20140705.0759","DOIUrl":"https://doi.org/10.3788/CO.20140705.0759","url":null,"abstract":"To overcome the limitations of inertia weight adjustment mechanism when the particle swarm optimization algorithm is applied to object tracking,an improved particle swarm optimization object tracking algorithm is proposed. Firstly,the object and the parameters in particle swarm optimization algorithm are initialized. Secondly,the inertia weight adjustment mechanism is improved by using the evolution rate of particle,and the inertia weight is achieved by taking the conditions of different particles in each generation into consideration. Then the speed,the position,the individual optimum and the global optimum of the particles are updated simultaneously while the next iteration is proceeding. Finally,the area which has the largest similarity function value is defined as the object by comparing the fitness value of each particle with the others. Experimental results indicate that the method reduces the iterations to obtain the same fitness value,and improves the operation efficiency by 42. 9% in comparison with the particle swarm optimization object tracking method which uses self-adapted inertia weight adjustment mechanism. The accurate positioning of the object is a-chieved in the case of the similarity function presenting \"multimodal\",and the method is well adapted to the situation when partial occlusion occurs in object tracking.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80110794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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