Pub Date : 2014-01-01DOI: 10.3788/GXJS20144005.0470
歹英杰 Dai Yingjie, 汪. W. Wei, 陈海龙 Chen Hailong, 栾军英 Luan Junying
Multi-degree of freedom for dynamic target vibration measurement problem is widely studied.Established vibration measurement system of dynamic target is based on double area array CCDs.Two cameras are used to capture vibration images of the target.By image processing,the target pixel position information is extracted.According to the target pixel position changes in the whole process,the displacement variation in three dimensions is calculated.Experimental results show that the measuring accuracy is about 0.1mm.Measurement system has the features of compact,high accuracy and applicability.
{"title":"Research on vibration measurement of dynamic target based on double area array CCDs","authors":"歹英杰 Dai Yingjie, 汪. W. Wei, 陈海龙 Chen Hailong, 栾军英 Luan Junying","doi":"10.3788/GXJS20144005.0470","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0470","url":null,"abstract":"Multi-degree of freedom for dynamic target vibration measurement problem is widely studied.Established vibration measurement system of dynamic target is based on double area array CCDs.Two cameras are used to capture vibration images of the target.By image processing,the target pixel position information is extracted.According to the target pixel position changes in the whole process,the displacement variation in three dimensions is calculated.Experimental results show that the measuring accuracy is about 0.1mm.Measurement system has the features of compact,high accuracy and applicability.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"470-475"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266336","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/GXJS20144006.0551
付毅 Fu Yi, 吴泽民 Wu Zemin, 田畅 Tian Chang, 曾明勇 Zeng Mingyong, 揭斐然 Jie Feiran
Video target tracking is a key issue in the field of computer vision.Based on the scene classification an online method for video target feature selection is proposed.During off-line,the modified spatial pyramid matching algorithm(NEW-SPM)is used to complete the sample-videos classification at first.And then the rough localization of target and background region is realized with TLD tracking algorithm,and the characteristics description the target and background is completed with different descriptors.After this,the feature distance between target and background is calculated through the form of log variance ratio.And finally,the fusion mean and entropy statistical analysis is carried out on the characteristics of distance for the saliency sorting of different descriptors.On this basis,the scenarios related characteristics saliency lists are constructed.Combining with the testing scenes judgment,the lists are applied to the on-line particle filter tracking system to select the best descriptor in the current category,and it is tested on the public library of tracking,the validity of the lists and the necessity of selection method are proven.
{"title":"Research on scene adaptive tracking feature selection","authors":"付毅 Fu Yi, 吴泽民 Wu Zemin, 田畅 Tian Chang, 曾明勇 Zeng Mingyong, 揭斐然 Jie Feiran","doi":"10.3788/GXJS20144006.0551","DOIUrl":"https://doi.org/10.3788/GXJS20144006.0551","url":null,"abstract":"Video target tracking is a key issue in the field of computer vision.Based on the scene classification an online method for video target feature selection is proposed.During off-line,the modified spatial pyramid matching algorithm(NEW-SPM)is used to complete the sample-videos classification at first.And then the rough localization of target and background region is realized with TLD tracking algorithm,and the characteristics description the target and background is completed with different descriptors.After this,the feature distance between target and background is calculated through the form of log variance ratio.And finally,the fusion mean and entropy statistical analysis is carried out on the characteristics of distance for the saliency sorting of different descriptors.On this basis,the scenarios related characteristics saliency lists are constructed.Combining with the testing scenes judgment,the lists are applied to the on-line particle filter tracking system to select the best descriptor in the current category,and it is tested on the public library of tracking,the validity of the lists and the necessity of selection method are proven.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"551-559"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266422","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/GXJS20144002.0099
宋剑锋 Song Jianfeng, 姚英学 Yao Yingxue, 谢大纲 Xie Dagang
For the spherical optical parts machined by using the bonnet polishing means,and by the orthogonal experimental means,with a view to the material removal rate and the surface roughness,the influencing degree of the five main influencing factors on the material removal rate and the surface roughness is researched.According to the experimental results,the process parameters are priority selected,and the optimal combination of the process parameters can be achieved.According to the process parameters optimized with a view to the material removal rate and the surface roughness,and aiming at controlling the surface roughness,the spherical optical parts are machined by using the discrete precession motion mode,and the ultra-precise smooth surface can be achieved.
{"title":"Research on the optimization of the process parameters of the bonnet polishing the spherical optical parts","authors":"宋剑锋 Song Jianfeng, 姚英学 Yao Yingxue, 谢大纲 Xie Dagang","doi":"10.3788/GXJS20144002.0099","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0099","url":null,"abstract":"For the spherical optical parts machined by using the bonnet polishing means,and by the orthogonal experimental means,with a view to the material removal rate and the surface roughness,the influencing degree of the five main influencing factors on the material removal rate and the surface roughness is researched.According to the experimental results,the process parameters are priority selected,and the optimal combination of the process parameters can be achieved.According to the process parameters optimized with a view to the material removal rate and the surface roughness,and aiming at controlling the surface roughness,the spherical optical parts are machined by using the discrete precession motion mode,and the ultra-precise smooth surface can be achieved.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"99-104"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262948","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/GXJS20144004.0321
王. W. Jing, 方俊永 Fang Junyong, 刘学 Liu Xue, 肖. X. Qing
In the process of airborne remote sensing monitoring,zoom lens is widely used and altitude is frequently changed.The airborne images of different resolutions are got.Therefore,to mosaic the quick views of different resolution for real-time monitoring is needed.A new method to solve the problem is proposed.This method uses quartering theory to split images,detects zooming ratio,and selects registration strategy.Then SURF(Speeded-Up Robust Features)algorithm is applied to mosaic images.It can be used to get a mosaic image under the condition of continuous zooming with focal distance ranging from high power to low power or from low power to high power.The mosaic experiments of zooming airborne images and zooming ground images indicate this new method can be used to mosaic images with different resolutions,and the results are all based on the highest resolution.
在航空遥感监测过程中，变焦镜头应用广泛，高度变化频繁。得到了不同分辨率的航空图像。因此，需要对不同分辨率的快速视图进行拼接，实现实时监控。提出了一种解决该问题的新方法。该方法利用四分理论对图像进行分割，检测放大比例，选择配准策略。然后将SURF(accelerated - up Robust Features)算法应用于拼接图像。它可以在从高功率到低功率或从低功率到高功率的焦距范围内连续变焦的情况下获得拼接图像。对机载图像和地面图像的缩放拼接实验表明，该方法可用于不同分辨率图像的拼接，且拼接结果均以最高分辨率为基础。
{"title":"A mosaic method of different ground resolution images","authors":"王. W. Jing, 方俊永 Fang Junyong, 刘学 Liu Xue, 肖. X. Qing","doi":"10.3788/GXJS20144004.0321","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0321","url":null,"abstract":"In the process of airborne remote sensing monitoring,zoom lens is widely used and altitude is frequently changed.The airborne images of different resolutions are got.Therefore,to mosaic the quick views of different resolution for real-time monitoring is needed.A new method to solve the problem is proposed.This method uses quartering theory to split images,detects zooming ratio,and selects registration strategy.Then SURF(Speeded-Up Robust Features)algorithm is applied to mosaic images.It can be used to get a mosaic image under the condition of continuous zooming with focal distance ranging from high power to low power or from low power to high power.The mosaic experiments of zooming airborne images and zooming ground images indicate this new method can be used to mosaic images with different resolutions,and the results are all based on the highest resolution.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"321-326"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264779","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/GXJS20144004.0335
张鹏飞 Zhang Pengfei
Thermo-optical effects of two types of complexes are investigated using constant laser z-scan technique under 457nm,488nm and 514nm excitation.Thermo-optical coefficients dn/dTand thermo-induced nonlinear refractive indexes n2values are calculated by combination of experimental curves and theoretical formula.By comparing the results,it is found that the thermo-induced nonlinear optical properties are dependent on the molecular structures and excitation wavelength.The thermo-optical coefficient and thermo-induced nonlinear refractive index value of Cu complexes are higher,and are insensitive to the excitation wavelength.The thermo-induced nonlinear optical values of Pd complexes are decreased with the increase of the excitation wavelength.It is decided by the absorption spectra difference induced by the molecular structure.
{"title":"Comparative study on the thermo-induced nonlinear optical properties of metal-organic complexes","authors":"张鹏飞 Zhang Pengfei","doi":"10.3788/GXJS20144004.0335","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0335","url":null,"abstract":"Thermo-optical effects of two types of complexes are investigated using constant laser z-scan technique under 457nm,488nm and 514nm excitation.Thermo-optical coefficients dn/dTand thermo-induced nonlinear refractive indexes n2values are calculated by combination of experimental curves and theoretical formula.By comparing the results,it is found that the thermo-induced nonlinear optical properties are dependent on the molecular structures and excitation wavelength.The thermo-optical coefficient and thermo-induced nonlinear refractive index value of Cu complexes are higher,and are insensitive to the excitation wavelength.The thermo-induced nonlinear optical values of Pd complexes are decreased with the increase of the excitation wavelength.It is decided by the absorption spectra difference induced by the molecular structure.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"335-338"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265569","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/GXJS20144003.0269
元雁龙 Yuan Yanlong, 江. A. Yi, 池宪 Chi Xian
Wavelength interrogation technology is the key technology of optical fiber sensors.A FBG sensor demodulation system is introduced based on tunable fiber F-P filter and DSP chip.A fast,stable and high resolution demodulation algorithm is demonstrated.Wavelength resolution of 2pm and wavelength measure range of 50nm are achieved.The DSP chip is used to control the optical scanning system,datum acquisition and processing.The demodulation speed of the system is improved.
{"title":"A demodulation system and algorithm of FBG sensor based on DSP","authors":"元雁龙 Yuan Yanlong, 江. A. Yi, 池宪 Chi Xian","doi":"10.3788/GXJS20144003.0269","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0269","url":null,"abstract":"Wavelength interrogation technology is the key technology of optical fiber sensors.A FBG sensor demodulation system is introduced based on tunable fiber F-P filter and DSP chip.A fast,stable and high resolution demodulation algorithm is demonstrated.Wavelength resolution of 2pm and wavelength measure range of 50nm are achieved.The DSP chip is used to control the optical scanning system,datum acquisition and processing.The demodulation speed of the system is improved.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"269-272"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264180","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/GXJS20144003.0235
廖永忠 Liao Yong-zhong, 蔡自兴 Cai Zi-xing, 何湘华 He Xiang-hua
The key of the blurred image blind restoration is the estimation of the point spread function and non-blind deconvolution algorithm.For the problem of the image blur which low SNR and small blur length caused by the camera shake,a fast robust algorithm is proposed to estimation the parameters of blur kernel function.Then the blurred images are restored by using a fast non-blind deconvolution method.Compared with R.Fergus' algorithm,the experiment results prove that the algorithm for motion blurred by the relative linear movement has faster speed and good recovery effect.
{"title":"Motion blurred image blind restoration base on parameter estimation of PSF","authors":"廖永忠 Liao Yong-zhong, 蔡自兴 Cai Zi-xing, 何湘华 He Xiang-hua","doi":"10.3788/GXJS20144003.0235","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0235","url":null,"abstract":"The key of the blurred image blind restoration is the estimation of the point spread function and non-blind deconvolution algorithm.For the problem of the image blur which low SNR and small blur length caused by the camera shake,a fast robust algorithm is proposed to estimation the parameters of blur kernel function.Then the blurred images are restored by using a fast non-blind deconvolution method.Compared with R.Fergus' algorithm,the experiment results prove that the algorithm for motion blurred by the relative linear movement has faster speed and good recovery effect.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"141 1","pages":"235-239"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264539","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/GXJS20144004.0353
薛. X. Jun, 杭凌侠 Hang Lingxia, 刘昊轩 Liu Haoxuan
The graded-index optical films prepared by PECVD have some distinctive advantages when compared with others.By controlling reaction gases ratios,the relationship between different reaction gases ratios and refractive index、extinction coefficient、deposition rate of thin film is analyzed,the reasons for variation of refractive index、extinction coefficient and deposition rate of thin film are discussed,the refractive-index-controllable thin films,like SiOxFy、SiOxNy、SixNyare obtained,the refractive index range is 1.36~2.06.
{"title":"Study on controlled refractive index of optical thin films by PECVD","authors":"薛. X. Jun, 杭凌侠 Hang Lingxia, 刘昊轩 Liu Haoxuan","doi":"10.3788/GXJS20144004.0353","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0353","url":null,"abstract":"The graded-index optical films prepared by PECVD have some distinctive advantages when compared with others.By controlling reaction gases ratios,the relationship between different reaction gases ratios and refractive index、extinction coefficient、deposition rate of thin film is analyzed,the reasons for variation of refractive index、extinction coefficient and deposition rate of thin film are discussed,the refractive-index-controllable thin films,like SiOxFy、SiOxNy、SixNyare obtained,the refractive index range is 1.36~2.06.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"105 1","pages":"353-356"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265509","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/GXJS20144006.0535
梁海锋 Liang Haifen, 蔡沛峰 Cai Peifeng
In order to realize non-contact central thickness measurement of the optical elements,an non-contact measurement system is established based on the electrical-optical scanning technology.Continuous moving light points are acquired in the optical axis when annular light produced by electrically controlling the optical switch array crosses the axicon.When the optical element places in the middle of these continuous moving light points,the thickness of the optical elements can be evaluated by monitoring the reflective light energy because the reflective light energy can present a peak when one of light points coincides with a surface of optical element.The mathematics model for testing the thickness of parallel plane plate and lens central thickness are built respectively.The measurement range and accuracy are analyzed in theory.The results show that the measurement range for parallel plate element varies from 5507 mm to 26 mm with the cone angle of axicon increasing from 1°to 40°,its materials refractive index is 1.52 and its radius is 100 mm,and the minimum measurement accuracy can reach to 2.5μm with measurement range of 26 mm.It can satisfy the non-contact measurement requirements of the central thickness of the optical elements.
{"title":"Non-contact measurement method for thickness of optical element","authors":"梁海锋 Liang Haifen, 蔡沛峰 Cai Peifeng","doi":"10.3788/GXJS20144006.0535","DOIUrl":"https://doi.org/10.3788/GXJS20144006.0535","url":null,"abstract":"In order to realize non-contact central thickness measurement of the optical elements,an non-contact measurement system is established based on the electrical-optical scanning technology.Continuous moving light points are acquired in the optical axis when annular light produced by electrically controlling the optical switch array crosses the axicon.When the optical element places in the middle of these continuous moving light points,the thickness of the optical elements can be evaluated by monitoring the reflective light energy because the reflective light energy can present a peak when one of light points coincides with a surface of optical element.The mathematics model for testing the thickness of parallel plane plate and lens central thickness are built respectively.The measurement range and accuracy are analyzed in theory.The results show that the measurement range for parallel plate element varies from 5507 mm to 26 mm with the cone angle of axicon increasing from 1°to 40°,its materials refractive index is 1.52 and its radius is 100 mm,and the minimum measurement accuracy can reach to 2.5μm with measurement range of 26 mm.It can satisfy the non-contact measurement requirements of the central thickness of the optical elements.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"535-538"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266310","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/GXJS20144001.0053
申雅峰 Shen Yafeng, 胡春艳 Hu Chunyan, 张. Z. Lei
A low complexity Levenberg-Marquarat algorithm for fiber grating wavelength demodulation algorithm is presented based on spectral peak location.Compared with the existing power weighted algorithm and the Gauss polynomial fitting algorithm,the algorithm has the advantage of high precision positioning spectral peak.Experiment results show that using the algorithm can effectively resist the noise and increase the demodulation precision in the high signal-to-noise ratio conditions.The wavelength demodulation error of fiber Bragg grating can be controlled within 1pm.Through the simplified data processing,it can meet the requirements of high-speed demodulation and is easy to realize on the digital circuit.
{"title":"A peak location algorithm for the demodulation spectrum of fiber Bragg grating","authors":"申雅峰 Shen Yafeng, 胡春艳 Hu Chunyan, 张. Z. Lei","doi":"10.3788/GXJS20144001.0053","DOIUrl":"https://doi.org/10.3788/GXJS20144001.0053","url":null,"abstract":"A low complexity Levenberg-Marquarat algorithm for fiber grating wavelength demodulation algorithm is presented based on spectral peak location.Compared with the existing power weighted algorithm and the Gauss polynomial fitting algorithm,the algorithm has the advantage of high precision positioning spectral peak.Experiment results show that using the algorithm can effectively resist the noise and increase the demodulation precision in the high signal-to-noise ratio conditions.The wavelength demodulation error of fiber Bragg grating can be controlled within 1pm.Through the simplified data processing,it can meet the requirements of high-speed demodulation and is easy to realize on the digital circuit.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"53-57"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262533","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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