Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.05.011
Yu Hua-long, Xue Hai-zhong
{"title":"Experimental study on long-distance transmission of high-power laser over single-mode fiber","authors":"Yu Hua-long, Xue Hai-zhong","doi":"10.11972/J.ISSN.1001-9014.2020.05.011","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.05.011","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"46 1","pages":"605"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.06.015
Li Chunlai, Liu Chen-yu, Jin Jian, Xu Rui, Xie Jia-Nan, Lyu Gang, Yuan Li-Yin, Liu Xiao, Xu Hong-gen, Wang Jian-yu
In this paper,we introduced the unique advantages of the thermal infrared hyperspectral imaging in many ap‐ plications,and then discuss the design to optimize sensitivity of the airborne thermal-infrared hyperspectral imaging sys‐ tem(ATHIS). Additionally,we establish emission spectrum of laboratory minerals and build the radiation model to measure the absorption spectrum of gas,with which the procession of separation of spectrum and temperature is ana‐ lyzed. Finally,ATHIS is used to carry out laboratory measurements of mineral emission spectrum and gas infrared ab‐ sorption spectrum. The results show that the data method we proposed for ATHIS can accurately invert mineral emissivi‐ ty spectrum and gas absorption spectrum. In the future,ATHIS will be used to carry out multi-platform remote sensing application experiments,which will lay the foundation for future development of space-borne thermal infrared hyper‐ spectral camera and data processing methods.
{"title":"Spectral measurement of minerals and gases based on airborne thermal-infrared hyperspectral imaging system","authors":"Li Chunlai, Liu Chen-yu, Jin Jian, Xu Rui, Xie Jia-Nan, Lyu Gang, Yuan Li-Yin, Liu Xiao, Xu Hong-gen, Wang Jian-yu","doi":"10.11972/J.ISSN.1001-9014.2020.06.015","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.06.015","url":null,"abstract":"In this paper,we introduced the unique advantages of the thermal infrared hyperspectral imaging in many ap‐ plications,and then discuss the design to optimize sensitivity of the airborne thermal-infrared hyperspectral imaging sys‐ tem(ATHIS). Additionally,we establish emission spectrum of laboratory minerals and build the radiation model to measure the absorption spectrum of gas,with which the procession of separation of spectrum and temperature is ana‐ lyzed. Finally,ATHIS is used to carry out laboratory measurements of mineral emission spectrum and gas infrared ab‐ sorption spectrum. The results show that the data method we proposed for ATHIS can accurately invert mineral emissivi‐ ty spectrum and gas absorption spectrum. In the future,ATHIS will be used to carry out multi-platform remote sensing application experiments,which will lay the foundation for future development of space-borne thermal infrared hyper‐ spectral camera and data processing methods.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"767"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.01.013
Ma Su-yu, Ma Chuanhe, Luo Xiaoshuang, LI Guo-Shuai, Sun Lin, Chen Ye, Yue Fang-yu, Chu Jun-hao
{"title":"Optical characterization of bandedge electronic structure and defect states in Cu 2 ZnSnS 4","authors":"Ma Su-yu, Ma Chuanhe, Luo Xiaoshuang, LI Guo-Shuai, Sun Lin, Chen Ye, Yue Fang-yu, Chu Jun-hao","doi":"10.11972/J.ISSN.1001-9014.2020.01.013","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.01.013","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"92"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.06.007
Liu Jun, Hegong Wei, Qiao Haidong, Yu Weihua, Lyu Xin
A D-band(110~170 GHz)direct detection radiometer front-end which consists of detector module, low noise amplifier module and standard gain horn antenna. The D-band detector is designed and fabricated based on zero-bias Schottky barrier diode HSCH-9161 and the measurement shows that the voltage sensitivity is larger than 400 mV/mW between 110~140 GHz,larger than 120 mV/mW in D-band and the maximal value reaches about 1 600 mV/mW@110 GHz. The D-band LNA module is packaged with self-designed MMIC and the module measurement shows the peak gain is 10. 8 dB@139 GHz,the gain higher than 7. 8 dB from 137 GHz to 144 GHz, the measured input return loss(S11)and output return loss(S22)are better than -5 dB and 8. 5 dB in operating frequencies,respectively. Finally,the imaging experiments based on this front-end are carried out.
{"title":"The study and application of D-band radiometer front-end","authors":"Liu Jun, Hegong Wei, Qiao Haidong, Yu Weihua, Lyu Xin","doi":"10.11972/J.ISSN.1001-9014.2020.06.007","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.06.007","url":null,"abstract":"A D-band(110~170 GHz)direct detection radiometer front-end which consists of detector module, low noise amplifier module and standard gain horn antenna. The D-band detector is designed and fabricated based on zero-bias Schottky barrier diode HSCH-9161 and the measurement shows that the voltage sensitivity is larger than 400 mV/mW between 110~140 GHz,larger than 120 mV/mW in D-band and the maximal value reaches about 1 600 mV/mW@110 GHz. The D-band LNA module is packaged with self-designed MMIC and the module measurement shows the peak gain is 10. 8 dB@139 GHz,the gain higher than 7. 8 dB from 137 GHz to 144 GHz, the measured input return loss(S11)and output return loss(S22)are better than -5 dB and 8. 5 dB in operating frequencies,respectively. Finally,the imaging experiments based on this front-end are carried out.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"704"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.05.004
Wu Li-min, L. Bin, Xu De-gang, Wang Yu-Ye, Ge Mei-Lan, Zhang Chao-nan, Liu Jia-hua, Sun Zhong-Cheng, Chen Tu-Nan, F. Hua, Yao Jian-quan
Breast cancer(BC)is one of the most common diseases in women. The accurate detection for BC is very important in clinical practice. In this paper,in-vivo breast cancer in a subcutaneous xe‐ nograft mouse was studied with the continuous-wave terahertz(THz) reflection imaging system at 2. 52THz. The high reflection region in THz images of in-vivo subcutaneous xenograft mouse corre‐ sponded well to the tumor area in visible. The difference value of 15% between tumor and normal tis‐ sues was observed. For the gold standard,the tumor areas at different depths from the surface of skin 文章编号:1001-9014(2020)05-0553-08 DOI:10. 11972/j. issn. 1001-9014. 2020. 05. 004 收稿日期:2019⁃ 09⁃ 26,修回日期:2020⁃ 06⁃ 04 Received date:2019⁃ 09⁃ 26,Revised date:2020⁃ 06⁃ 04 基金项目:国家 973计划(2015CB755403),国家自然科学基金(61775160,61771332),中国博士后科学基金特别资助(2016M602954),重庆市 博士后科研项目特别资助(Xm2016021),重庆西南医院生物强院科技创新计划(SWH2016LHJC04,SWH2016LHJC01) Foundation items:Supported by National Basic Research Program of China(973)(2015CB755403),National Natural Science Foundation of China (NSFC)(61775160,61771332),China Postdoctoral Science Foundation(2016M602954),Postdoctoral Science Foundation of Chongqing (Xm2016021),Joint Incubation Project of Southwest Hospital(SWH2016LHJC-04,SWH2016LHJC-01); 作者简介(Biography):武丽敏(1989-),女,山东聊城人,博士生,主要研究领域为太赫兹生物医学成像 . E-mail:wulimin@tju. edu. cn. *通讯作者(Corresponding author):E-mail:yuyewang@tju. edu. cn
{"title":"Study of in-vivo breast cancer in a subcutaneous xenograft mouse model using terahertz imaging","authors":"Wu Li-min, L. Bin, Xu De-gang, Wang Yu-Ye, Ge Mei-Lan, Zhang Chao-nan, Liu Jia-hua, Sun Zhong-Cheng, Chen Tu-Nan, F. Hua, Yao Jian-quan","doi":"10.11972/J.ISSN.1001-9014.2020.05.004","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.05.004","url":null,"abstract":"Breast cancer(BC)is one of the most common diseases in women. The accurate detection for BC is very important in clinical practice. In this paper,in-vivo breast cancer in a subcutaneous xe‐ nograft mouse was studied with the continuous-wave terahertz(THz) reflection imaging system at 2. 52THz. The high reflection region in THz images of in-vivo subcutaneous xenograft mouse corre‐ sponded well to the tumor area in visible. The difference value of 15% between tumor and normal tis‐ sues was observed. For the gold standard,the tumor areas at different depths from the surface of skin 文章编号:1001-9014(2020)05-0553-08 DOI:10. 11972/j. issn. 1001-9014. 2020. 05. 004 收稿日期:2019⁃ 09⁃ 26,修回日期:2020⁃ 06⁃ 04 Received date:2019⁃ 09⁃ 26,Revised date:2020⁃ 06⁃ 04 基金项目:国家 973计划(2015CB755403),国家自然科学基金(61775160,61771332),中国博士后科学基金特别资助(2016M602954),重庆市 博士后科研项目特别资助(Xm2016021),重庆西南医院生物强院科技创新计划(SWH2016LHJC04,SWH2016LHJC01) Foundation items:Supported by National Basic Research Program of China(973)(2015CB755403),National Natural Science Foundation of China (NSFC)(61775160,61771332),China Postdoctoral Science Foundation(2016M602954),Postdoctoral Science Foundation of Chongqing (Xm2016021),Joint Incubation Project of Southwest Hospital(SWH2016LHJC-04,SWH2016LHJC-01); 作者简介(Biography):武丽敏(1989-),女,山东聊城人,博士生,主要研究领域为太赫兹生物医学成像 . E-mail:wulimin@tju. edu. cn. *通讯作者(Corresponding author):E-mail:yuyewang@tju. edu. cn","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"553"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.03.016
HU Pei-lun, Chen Yu-Wei, Jiang Changhui, Lin Qi-Nan, Li Wei, QI Jian-Bo, YU Lin-Feng, Shao Hui, Huang Hua-guo
Hyperspectral laser radar combines the characteristics of LiDAR and hyperspectral informa‐ tion,and provides more accurate remote sensing detection methods of the extraction of vegetation physiological and biochemical parameters,but its application potential has not been fully explored. In 文章编号:1001-9014(2020)03-0372-09 DOI:10. 11972/j. issn. 1001-9014. 2020. 03. 016 收稿日期:2020⁃ 02⁃ 19,修回日期:2020⁃ 03⁃ 19 Received date:2020⁃ 02⁃ 19,Revised date:2020⁃ 03⁃ 19 基金项目:国家重点研发计划项目(2017YFC0504003-4);国家自然科学基金(41571332) Foundation items:Supported by National key research and development project(2017YFC0504003-4);the National Natural Science Foundation of China(41571332) 作者简介(Biography):胡佩纶(1995-),男,江西宜春人,硕士研究生,主要研究领域为:植被定量遥感 . Email:hupeilun_818@163. com。 *通讯作者(Corresponding author):Email:huaguo_huang@bjfu. edu. cn 3期 胡佩纶 等:基于室内高光谱激光雷达的典型树种叶片光谱观测和分类 this paper,the leaves of 10 typical tree species in Beijing are taken as samples to carry out the leaf ob‐ servation experiment of indoor hyperspectral laser radar. And the tree species classification research is carried out to provide the basis of the future forestry application of hyperspectral laser radar. In this study,the hyperspectral data of tunable hyperspectral LiDAR(HSL)was carried out and compared with the data measured by ASD spectrometer. Secondly,10 kinds of leaves were classified by random forest method. In the process,the total spectral index is obtained by combining all the bands and some sensitive bands with the spectral index. The results show that:(a)HSL is consistent with ASD spectra observed in the band 650~1 000 nm(71 channels)(R=0. 9525~0. 993 2,RMSE=0. 058 7);(b)The classification accuracy of the original band reflectivity is 78. 31%,there into the maximum contribu‐ tion rate of the classification band is 650~750 nm,and the classification accuracy is 94. 18% using this band which shows that it is very effective in classify tree species by using red edge band(650~750 nm);(c)the bands sensitive to tree species classification are 680 nm,685 nm,690 nm,715 nm,720 nm,725 nm,730 nm;(d)When we combine the spectral index and vegetation index,the classifica‐ tion accuracy is 82. 65%. This study shows that at the single leaf level,hyperspectral LiDAR can accu‐ rately reflect the spectral characteristics of the target leaves and classify the species of different trees ef‐ fectively. It is possible to extract physiological and biochemical parameters of targets for the future field applications accurately.
Hyperspectral laser radar combines the characteristics of LiDAR and hyperspectral informa‐ tion,and provides more accurate remote sensing detection methods of the extraction of vegetation physiological and biochemical parameters,but its application potential has not been fully explored. In 文章编号:1001-9014(2020)03-0372-09 DOI:10. 11972/j. issn. 1001-9014. 2020. 03. 016 收稿日期:2020⁃ 02⁃ 19,修回日期:2020⁃ 03⁃ 19 Received date:2020⁃ 02⁃ 19,Revised date:2020⁃ 03⁃ 19 基金项目:国家重点研发计划项目(2017YFC0504003-4);国家自然科学基金(41571332) Foundation items:Supported by National key research and development project(2017YFC0504003-4);the National Natural Science Foundation of China(41571332) 作者简介(Biography):胡佩纶(1995-),男,江西宜春人,硕士研究生,主要研究领域为:植被定量遥感 . Email:hupeilun_818@163. com。 *通讯作者(Corresponding author):Email:huaguo_huang@bjfu. edu. cn 3期 胡佩纶 等:基于室内高光谱激光雷达的典型树种叶片光谱观测和分类 this paper,the leaves of 10 typical tree species in Beijing are taken as samples to carry out the leaf ob‐ servation experiment of indoor hyperspectral laser radar. And the tree species classification research is carried out to provide the basis of the future forestry application of hyperspectral laser radar. In this study,the hyperspectral data of tunable hyperspectral LiDAR(HSL)was carried out and compared with the data measured by ASD spectrometer. Secondly,10 kinds of leaves were classified by random forest method. In the process,the total spectral index is obtained by combining all the bands and some sensitive bands with the spectral index. The results show that:(a)HSL is consistent with ASD spectra observed in the band 650~1 000 nm(71 channels)(R=0. 9525~0. 993 2,RMSE=0. 058 7);(b)The classification accuracy of the original band reflectivity is 78. 31%,there into the maximum contribu‐ tion rate of the classification band is 650~750 nm,and the classification accuracy is 94. 18% using this band which shows that it is very effective in classify tree species by using red edge band(650~750 nm);(c)the bands sensitive to tree species classification are 680 nm,685 nm,690 nm,715 nm,720 nm,725 nm,730 nm;(d)When we combine the spectral index and vegetation index,the classifica‐ tion accuracy is 82. 65%. This study shows that at the single leaf level,hyperspectral LiDAR can accu‐ rately reflect the spectral characteristics of the target leaves and classify the species of different trees ef‐ fectively. It is possible to extract physiological and biochemical parameters of targets for the future field applications accurately.
{"title":"Spectral observation and classification of typical tree species leaves based on indoor hyperspectral lidar","authors":"HU Pei-lun, Chen Yu-Wei, Jiang Changhui, Lin Qi-Nan, Li Wei, QI Jian-Bo, YU Lin-Feng, Shao Hui, Huang Hua-guo","doi":"10.11972/J.ISSN.1001-9014.2020.03.016","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.03.016","url":null,"abstract":"Hyperspectral laser radar combines the characteristics of LiDAR and hyperspectral informa‐ tion,and provides more accurate remote sensing detection methods of the extraction of vegetation physiological and biochemical parameters,but its application potential has not been fully explored. In 文章编号:1001-9014(2020)03-0372-09 DOI:10. 11972/j. issn. 1001-9014. 2020. 03. 016 收稿日期:2020⁃ 02⁃ 19,修回日期:2020⁃ 03⁃ 19 Received date:2020⁃ 02⁃ 19,Revised date:2020⁃ 03⁃ 19 基金项目:国家重点研发计划项目(2017YFC0504003-4);国家自然科学基金(41571332) Foundation items:Supported by National key research and development project(2017YFC0504003-4);the National Natural Science Foundation of China(41571332) 作者简介(Biography):胡佩纶(1995-),男,江西宜春人,硕士研究生,主要研究领域为:植被定量遥感 . Email:hupeilun_818@163. com。 *通讯作者(Corresponding author):Email:huaguo_huang@bjfu. edu. cn 3期 胡佩纶 等:基于室内高光谱激光雷达的典型树种叶片光谱观测和分类 this paper,the leaves of 10 typical tree species in Beijing are taken as samples to carry out the leaf ob‐ servation experiment of indoor hyperspectral laser radar. And the tree species classification research is carried out to provide the basis of the future forestry application of hyperspectral laser radar. In this study,the hyperspectral data of tunable hyperspectral LiDAR(HSL)was carried out and compared with the data measured by ASD spectrometer. Secondly,10 kinds of leaves were classified by random forest method. In the process,the total spectral index is obtained by combining all the bands and some sensitive bands with the spectral index. The results show that:(a)HSL is consistent with ASD spectra observed in the band 650~1 000 nm(71 channels)(R=0. 9525~0. 993 2,RMSE=0. 058 7);(b)The classification accuracy of the original band reflectivity is 78. 31%,there into the maximum contribu‐ tion rate of the classification band is 650~750 nm,and the classification accuracy is 94. 18% using this band which shows that it is very effective in classify tree species by using red edge band(650~750 nm);(c)the bands sensitive to tree species classification are 680 nm,685 nm,690 nm,715 nm,720 nm,725 nm,730 nm;(d)When we combine the spectral index and vegetation index,the classifica‐ tion accuracy is 82. 65%. This study shows that at the single leaf level,hyperspectral LiDAR can accu‐ rately reflect the spectral characteristics of the target leaves and classify the species of different trees ef‐ fectively. It is possible to extract physiological and biochemical parameters of targets for the future field applications accurately.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"372"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.01.001
Liu Baojian, Duan Weibo, Li Daqi, Yu Deming, Chen Gang, Liu Dingquan
In this paper,the influence of annealing temperature on the structure and optical properties of silicon films was systemically investigated. Silicon films were deposited by electron beam evaporation and then annealed in N2 atmosphere within a temperature range from 200 to 500 °C. The films were characterized by X-ray diffrac⁃ tion(XRD),Raman spectroscopy,electronic-spin resonance(ESR)and optical transmittance measurement,re⁃ spectively. With annealing temperature increased,the amorphous network order of silicon films was improved on the short and medium range and the defect density decreased remarkably. When sample being annealed at 400°C, the extinction coefficient k decreased from 6. 14×10 to a minimum value of 1. 02×10(at 1000 nm),which was due to the lowest defect density,about one fifth of the as-deposited sample. The results showed that annealing at an appropriate temperature could effectively reduce the optical absorption of silicon films in the near infrared re⁃ gion,which were very critical for the application in optical thin film coating devices.
{"title":"The influence of annealing temperature on the structure and optical properties of silicon films deposited by electron beam evaporation","authors":"Liu Baojian, Duan Weibo, Li Daqi, Yu Deming, Chen Gang, Liu Dingquan","doi":"10.11972/J.ISSN.1001-9014.2020.01.001","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.01.001","url":null,"abstract":"In this paper,the influence of annealing temperature on the structure and optical properties of silicon films was systemically investigated. Silicon films were deposited by electron beam evaporation and then annealed in N2 atmosphere within a temperature range from 200 to 500 °C. The films were characterized by X-ray diffrac⁃ tion(XRD),Raman spectroscopy,electronic-spin resonance(ESR)and optical transmittance measurement,re⁃ spectively. With annealing temperature increased,the amorphous network order of silicon films was improved on the short and medium range and the defect density decreased remarkably. When sample being annealed at 400°C, the extinction coefficient k decreased from 6. 14×10 to a minimum value of 1. 02×10(at 1000 nm),which was due to the lowest defect density,about one fifth of the as-deposited sample. The results showed that annealing at an appropriate temperature could effectively reduce the optical absorption of silicon films in the near infrared re⁃ gion,which were very critical for the application in optical thin film coating devices.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"5 1","pages":"1"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.06.021
Li Zhi-jian, Yang Feng-bao, Gao Yu-bin, J. Linna, Hu Peng
To ensure the fusion quality and efficiency simultaneously,a novel image fusion method based on multi-scale Gaussian filtering and morphological transform is proposed. The multi-scale Gaussian filtering is de⁃ signed to decompose the source images into a series of detail images and approximation images. The multi-scale topand bottom-hat decompositions are used respectively to fully extract the bright and dark details of different scales in each approximation image. The multi-scale morphological innerand outer-boundary decompositions are constructed to fully extract boundary information in each detail image. Experimental results demonstrate that the proposed method is comparable to or even better in comparison with typical multi-scale decomposition-based fu⁃ sion methods. Additionally,the method operates much faster than some advanced multi-scale decompositionbased methods like NSCT and NSST.
{"title":"Fusion method for infrared and other-type images based on the multi-scale Gaussian filtering and morphological transform","authors":"Li Zhi-jian, Yang Feng-bao, Gao Yu-bin, J. Linna, Hu Peng","doi":"10.11972/J.ISSN.1001-9014.2020.06.021","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.06.021","url":null,"abstract":"To ensure the fusion quality and efficiency simultaneously,a novel image fusion method based on multi-scale Gaussian filtering and morphological transform is proposed. The multi-scale Gaussian filtering is de⁃ signed to decompose the source images into a series of detail images and approximation images. The multi-scale topand bottom-hat decompositions are used respectively to fully extract the bright and dark details of different scales in each approximation image. The multi-scale morphological innerand outer-boundary decompositions are constructed to fully extract boundary information in each detail image. Experimental results demonstrate that the proposed method is comparable to or even better in comparison with typical multi-scale decomposition-based fu⁃ sion methods. Additionally,the method operates much faster than some advanced multi-scale decompositionbased methods like NSCT and NSST.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"810"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.11972/J.ISSN.1001-9014.2020.03.017
Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang
Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.
{"title":"Extended Omega-k algorithm for synthetic aperture radar imaging in multi-layer medium","authors":"Zheng Hai-tao, Liao Shiyong, D. James, Sun Houjun, Liu Xiaoguang","doi":"10.11972/J.ISSN.1001-9014.2020.03.017","DOIUrl":"https://doi.org/10.11972/J.ISSN.1001-9014.2020.03.017","url":null,"abstract":"Processing ground penetrating radar data to obtain well-focused images for object detection has been an active research area. Phase-shift migration(PSM)is a widely used method since it allows the wave velocity to vary with respect to multi-layer medium. However,this requires pixel-by-pixel calculation of the image,which is time-consuming. This paper presents an extended Omega-k algorithm for multi-layer medium imaging with signif⁃ icantly less computation complexity than the PSM algorithm. The extended Omega-k exploits fast interpolation in the wave-number domain instead of iterative calculating as done by PSM. The method of estimating the wave propagation velocity in different media is also proposed via vertex region extraction for phase compensation and image focusing. Various images of buried targets of a two-layer medium experiment are obtained,which validate the effectiveness of the proposed algorithm,and make it practical for some typical ground-based surveillance ap⁃ plications.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"39 1","pages":"381"},"PeriodicalIF":0.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66394519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：