Pub Date : 2014-01-01DOI: 10.3788/GXJS20144002.0105
吴青晴 Wu Qingqing, 张晓东 Zhang Xiaodong, 房丰洲 Fang Fengzhou, 张. Z. Lin
A surface measurement system is designed according to the features of cubic phase plate surface based on wavefront sensing technology.A mapping model from reflected wavefront to surface shape is presented,and in order to measure surface with greater curvature,an algorithm based on image processing method is proposed to improve the dynamic range of the wavefront sensor.Simulation analysis shows that the conversion accuracy of the proposed mapping model is 2~3 times better than traditional algorithm and the dynamic range is increased nearly 4times.Finally,an experimental system is built to measure the surface of an actual cubic phase plate,the result compared with the data achieved by Wyko white light interferometer verifies the correctness and accuracy of the measurement system.
{"title":"Shape measurement of the cubic phase plate with wavefront sensing technology","authors":"吴青晴 Wu Qingqing, 张晓东 Zhang Xiaodong, 房丰洲 Fang Fengzhou, 张. Z. Lin","doi":"10.3788/GXJS20144002.0105","DOIUrl":"https://doi.org/10.3788/GXJS20144002.0105","url":null,"abstract":"A surface measurement system is designed according to the features of cubic phase plate surface based on wavefront sensing technology.A mapping model from reflected wavefront to surface shape is presented,and in order to measure surface with greater curvature,an algorithm based on image processing method is proposed to improve the dynamic range of the wavefront sensor.Simulation analysis shows that the conversion accuracy of the proposed mapping model is 2~3 times better than traditional algorithm and the dynamic range is increased nearly 4times.Finally,an experimental system is built to measure the surface of an actual cubic phase plate,the result compared with the data achieved by Wyko white light interferometer verifies the correctness and accuracy of the measurement system.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"105-112"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262617","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/GXJS20144001.0089
张金泉 Zhang Jinquan, 李香文 Li Xiangwen, 李. L. Dong, 张. Z. Xin, 刘素杰 Liu Sujie, 于立成 Yu Licheng
A new solution is proposed due to the performance declining of long distance distribution vibration detection sensors used at complex environment.The solution takes advantage of vibration signal feature extraction,separation and fusion technique which is widely adopted in radar signal processing field,and accomplishes individual vibration signal restore during a multi-source noise.The field test results are accurate when the sensors are used to check two and four concurrent events.The solution provides technical support to deploy long distance distribution vibration detection sensors at harsh environment.
{"title":"A method of concurrent events signal reconstruction in ultra-long distance distributed optical fiber vibration sensor","authors":"张金泉 Zhang Jinquan, 李香文 Li Xiangwen, 李. L. Dong, 张. Z. Xin, 刘素杰 Liu Sujie, 于立成 Yu Licheng","doi":"10.3788/GXJS20144001.0089","DOIUrl":"https://doi.org/10.3788/GXJS20144001.0089","url":null,"abstract":"A new solution is proposed due to the performance declining of long distance distribution vibration detection sensors used at complex environment.The solution takes advantage of vibration signal feature extraction,separation and fusion technique which is widely adopted in radar signal processing field,and accomplishes individual vibration signal restore during a multi-source noise.The field test results are accurate when the sensors are used to check two and four concurrent events.The solution provides technical support to deploy long distance distribution vibration detection sensors at harsh environment.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"89-93"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262774","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/GXJS20144003.0219
刘. L. Lu, 李艳宁 Li Yanning, 吴. W. Sen, 胡晓东 Hu Xiaodong
A microscope system for the deflection angle measurement of microstructures is presented.The microscope consists of an infinite conjugate imaging system and an integrated optical lever.The laser beam of the optical lever is focused by the infinite objective to a size less than 10μm.A current-mode circuit is designed for signal processing for the optical lever,and 5MHz in bandwidth is achieved.The measurement range and resolution of the system are±4°and 1.2″, respectively.As a test,the system is used to measure the deflection angles at the free end of a cantilever probe of atomic force microscope under step load.The measurement results are consistent well with the calculation by using Timoshenko beam theory.
{"title":"Deflection angle measurement system for microstructure based on microscope optical lever","authors":"刘. L. Lu, 李艳宁 Li Yanning, 吴. W. Sen, 胡晓东 Hu Xiaodong","doi":"10.3788/GXJS20144003.0219","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0219","url":null,"abstract":"A microscope system for the deflection angle measurement of microstructures is presented.The microscope consists of an infinite conjugate imaging system and an integrated optical lever.The laser beam of the optical lever is focused by the infinite objective to a size less than 10μm.A current-mode circuit is designed for signal processing for the optical lever,and 5MHz in bandwidth is achieved.The measurement range and resolution of the system are±4°and 1.2″, respectively.As a test,the system is used to measure the deflection angles at the free end of a cantilever probe of atomic force microscope under step load.The measurement results are consistent well with the calculation by using Timoshenko beam theory.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"39 1","pages":"219-224"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264487","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/GXJS20144003.0225
罗杨洁 Luo Yangjie
On the basis of polarized detection mechanism,the relationship between the polarization degree and the refractive index is established,and the change regulation on different refractive indexes combination is discussed.The results show that when the solar incident angle at the left of the intersection angle,the polarization degree is inversely proportional to the refractive index,and when the solar incident angle at the right of the intersection angle,the polarization degree is proportional to the refractive index.The D-values of polarization degree reaches the maximum at the solar incident angle 40°or 70°.To obtain polarization information in the suitable angle,the accuracy of the water remote sensing can be improved.
{"title":"Research on solar incident angle of water body polarized remote sensing","authors":"罗杨洁 Luo Yangjie","doi":"10.3788/GXJS20144003.0225","DOIUrl":"https://doi.org/10.3788/GXJS20144003.0225","url":null,"abstract":"On the basis of polarized detection mechanism,the relationship between the polarization degree and the refractive index is established,and the change regulation on different refractive indexes combination is discussed.The results show that when the solar incident angle at the left of the intersection angle,the polarization degree is inversely proportional to the refractive index,and when the solar incident angle at the right of the intersection angle,the polarization degree is proportional to the refractive index.The D-values of polarization degree reaches the maximum at the solar incident angle 40°or 70°.To obtain polarization information in the suitable angle,the accuracy of the water remote sensing can be improved.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"22 4 1","pages":"225-229"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70264495","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}
A method is proposed to measure off-axis aspherical mirrors with a circular flat base,a rectangular flat base and a family of parallel lines that cut the circular flat base by a coordinate measurement machine(CMM).In response to the base features above,workpiece coordinate system is designed,and the positioning points used to establish the workpiece coordinate system are defined.The 3D-coordinates point-cloud data on the off-axis mirrors are obtained with automatic measurement of single points schema by CMM,and then,the off-axis aspheric surface data processing model for these error corrections is built.Compared with the data by the theoretical model,the surface error of an actual off-axis aspheric surface is obtained.All the pre-polishing processes are guided according to the measurement results.
{"title":"Off-axis aspheric surface measurement by coordinate contour measuring machine","authors":"陈曦 Chen Xi, 郭培基 Guo Peiji, 王建明 Wang Jianming, 仇谷烽 Qiu Gufeng","doi":"10.3788/GXJS20144004.0339","DOIUrl":"https://doi.org/10.3788/GXJS20144004.0339","url":null,"abstract":"A method is proposed to measure off-axis aspherical mirrors with a circular flat base,a rectangular flat base and a family of parallel lines that cut the circular flat base by a coordinate measurement machine(CMM).In response to the base features above,workpiece coordinate system is designed,and the positioning points used to establish the workpiece coordinate system are defined.The 3D-coordinates point-cloud data on the off-axis mirrors are obtained with automatic measurement of single points schema by CMM,and then,the off-axis aspheric surface data processing model for these error corrections is built.Compared with the data by the theoretical model,the surface error of an actual off-axis aspheric surface is obtained.All the pre-polishing processes are guided according to the measurement results.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"339-344"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265163","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/GXJS20144005.0440
高卫 Gao Wei, 孙奕帆 Sun Yi-fan, 危艳玲 Wei Yanling
The stealthy jamming effect on a TV homing seeker is investigated by flight test in which the seeker is loaded on an unmanned airship.The basic law of stealthy jamming effect on the performance of the TV homing seeker is discovered and explained.The results are referential for the study of stealthy jamming mechanism and the anti-jamming design of imaging seekers.
{"title":"Study on stealthy jamming effect on TV homing seekers","authors":"高卫 Gao Wei, 孙奕帆 Sun Yi-fan, 危艳玲 Wei Yanling","doi":"10.3788/GXJS20144005.0440","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0440","url":null,"abstract":"The stealthy jamming effect on a TV homing seeker is investigated by flight test in which the seeker is loaded on an unmanned airship.The basic law of stealthy jamming effect on the performance of the TV homing seeker is discovered and explained.The results are referential for the study of stealthy jamming mechanism and the anti-jamming design of imaging seekers.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"440-444"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70265634","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/GXJS20144005.0410
禹定臣 Yu Ding-chen, 郝东山 Hao Dongshan
By using the model of multi-photon nonlinear Compton scattering,nonlinear Schrdinger equation,Rungekutta algorithm and variation method,the influences of Compton scattering on the propagation properties of sub-picosecond super-Gaussian pulse in plasma are studied.The revised equations of the propagation evolution of super-Gaussian pulse are given out,and the equations are computed by using numbers.The results show that the compressed degree of pulse width and nonlinear effect are increased by Compton scattering than before Compton scattering,pulse expansion width is decreased and dispersion effect is effectively decreased by the increased nonlinear effect.The frequency is quivered when the pulse width is reached maximum or minimum,the chattering is not a 0.The oscillation evolution of the amplitude of the super-Gaussian pulse is accelerated along with the increase of propagation distance,the oscillation evolutions of the chattering and pulse width are accelerated too,the linear relation quivering is appeared between the frequency and phase and propagation distance,the quasi-linear relation is appeared between the central place of pulse and propagation distance.The important influences to the conformal transmission of the super-Gaussian pulse are taken place by Compton scattering.
{"title":"Influences of Compton scattering on the propagation properties of sub-picosecond super-Gaussian pulse in plasma","authors":"禹定臣 Yu Ding-chen, 郝东山 Hao Dongshan","doi":"10.3788/GXJS20144005.0410","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0410","url":null,"abstract":"By using the model of multi-photon nonlinear Compton scattering,nonlinear Schrdinger equation,Rungekutta algorithm and variation method,the influences of Compton scattering on the propagation properties of sub-picosecond super-Gaussian pulse in plasma are studied.The revised equations of the propagation evolution of super-Gaussian pulse are given out,and the equations are computed by using numbers.The results show that the compressed degree of pulse width and nonlinear effect are increased by Compton scattering than before Compton scattering,pulse expansion width is decreased and dispersion effect is effectively decreased by the increased nonlinear effect.The frequency is quivered when the pulse width is reached maximum or minimum,the chattering is not a 0.The oscillation evolution of the amplitude of the super-Gaussian pulse is accelerated along with the increase of propagation distance,the oscillation evolutions of the chattering and pulse width are accelerated too,the linear relation quivering is appeared between the frequency and phase and propagation distance,the quasi-linear relation is appeared between the central place of pulse and propagation distance.The important influences to the conformal transmission of the super-Gaussian pulse are taken place by Compton scattering.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"410-415"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266055","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}
In order to improve the accuracy and reduce the prediction time of detection of magnetic tile surface defect,a method of the feature selection and the bias classification is proposed.While offline training,the subgraphs which are generated from the transformation by Gabor filters are fused.Then the texture features of the pictures are extracted.The Relief algorithm is improved to extract the feature subset which have a strong correlation with category and remove redundant features.In order to decrease the miss rate of defective magnetic tile,the bias classification is performed before used LSSVM to predict the categories.It is proved that the proposed method can achieve about 99.09%as the accuracy rate of the defect magnet and the overall accuracy rate is about 96.89%.Compared with the original method,the online prediction only costs 67.4ms which decreased by nearly 1/4.
{"title":"The feature selection and bias classification of magnetic tile surface defect","authors":"张振尧 Zhang Zhenyao, 白瑞林 Bai Ruilin, 过志强 Guo Zhiqiang, 姜利杰 Jiang Lijie","doi":"10.3788/GXJS20144005.0434","DOIUrl":"https://doi.org/10.3788/GXJS20144005.0434","url":null,"abstract":"In order to improve the accuracy and reduce the prediction time of detection of magnetic tile surface defect,a method of the feature selection and the bias classification is proposed.While offline training,the subgraphs which are generated from the transformation by Gabor filters are fused.Then the texture features of the pictures are extracted.The Relief algorithm is improved to extract the feature subset which have a strong correlation with category and remove redundant features.In order to decrease the miss rate of defective magnetic tile,the bias classification is performed before used LSSVM to predict the categories.It is proved that the proposed method can achieve about 99.09%as the accuracy rate of the defect magnet and the overall accuracy rate is about 96.89%.Compared with the original method,the online prediction only costs 67.4ms which decreased by nearly 1/4.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"21 1","pages":"434-439"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70266093","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/GXJS20144001.0045
薛涛 Xue Tao, 苏成悦 Su Chengyue, 张康 Zhang Kang, 张春华 Zhang Chun-hua, 付倩 Fu Qian
A design algorithm of free surface lens based on extended source that can realize uniform illumination with small angle is presented.The energy correspondence between the extended source and the target plane is established.Using the edge-ray principle of nonimaging optics,a number of discrete points of the freeform profile curve is calculated and fitted to lens entity.By using non-sequential ray tracing to simulate lens with different light source size,under the premise of uniform illumination,the impact of the size of the light source for emitting angle is discussed.The simulation results show that the optical system can achieve uniform illumination with extended source and divergence angle can be controlled to its minimum angle.
{"title":"Design for LED free surface lens with small angle based on extended source","authors":"薛涛 Xue Tao, 苏成悦 Su Chengyue, 张康 Zhang Kang, 张春华 Zhang Chun-hua, 付倩 Fu Qian","doi":"10.3788/GXJS20144001.0045","DOIUrl":"https://doi.org/10.3788/GXJS20144001.0045","url":null,"abstract":"A design algorithm of free surface lens based on extended source that can realize uniform illumination with small angle is presented.The energy correspondence between the extended source and the target plane is established.Using the edge-ray principle of nonimaging optics,a number of discrete points of the freeform profile curve is calculated and fitted to lens entity.By using non-sequential ray tracing to simulate lens with different light source size,under the premise of uniform illumination,the impact of the size of the light source for emitting angle is discussed.The simulation results show that the optical system can achieve uniform illumination with extended source and divergence angle can be controlled to its minimum angle.","PeriodicalId":35591,"journal":{"name":"Guangxue Jishu/Optical Technique","volume":"40 1","pages":"45-49"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70262300","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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