激光与光电子学进展Pub Date : 2023-01-01DOI: 10.3788/lop221675
叶玉宁 Ye Yuning, 王长顺 Wang Changshun
{"title":"闪耀光栅锥面衍射的标量分析","authors":"叶玉宁 Ye Yuning, 王长顺 Wang Changshun","doi":"10.3788/lop221675","DOIUrl":"https://doi.org/10.3788/lop221675","url":null,"abstract":"基于扩展标量衍射理论，同时对于透射和反射的情况，考虑了入射光的方位角（即锥面衍射），推导了闪耀光栅任意衍射级次的相对衍射效率。证明在分别以平面和介质分界面为界对闪耀光栅运用扩展标量理论时，得到的相对衍射效率公式不同，但是得到的最优化深度和闪耀波长相同，并给出了相应的显式表达式。以特定参数的闪耀光栅为例，分别将两种相对衍射效率公式与严格耦合波理论进行了比较，结果表明，两种公式差距很小，且均和严格耦合波理论结果符合得很好。","PeriodicalId":51502,"journal":{"name":"激光与光电子学进展","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662319","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}
激光与光电子学进展Pub Date : 2023-01-01DOI: 10.3788/lop221348
胡小丽 Hu Xiaoli, 唐明刚 Tang Minggang, 刘彪 Liu Biao, 贺旭桐 He Xutong, 张乐 Zhang Le, 王雨 Wang Yu
{"title":"空间直线矢量至投影平面姿态映射分析及应用","authors":"胡小丽 Hu Xiaoli, 唐明刚 Tang Minggang, 刘彪 Liu Biao, 贺旭桐 He Xutong, 张乐 Zhang Le, 王雨 Wang Yu","doi":"10.3788/lop221348","DOIUrl":"https://doi.org/10.3788/lop221348","url":null,"abstract":"为了解决靶场典型刚体目标（大多具有线性外化特征）光学姿态处理的算法共性适应问题，提出了直线矢量三维-二维（3D-2D）物像映射通用关系，后依据所需选取直线矢量进行物像方向映射后匹配的方法获取姿态角信息。首先对目标主体直线矢量进行了旋转变换，获取了关键主体直线矢量与所求姿态角的理论对应关系，然后将关键矢量向确定像面进行投影，确立了空间直线矢量至投影像面姿态的映射关系，并通过分站映射结果对空间直线矢量进行了重构，以达到闭环验证映射结果正确性的目的。该研究为基于直线矢量的光学姿态处理提供了重要的直线矢量3D-2D姿态映射关系，并以此为基础，进行纯方向姿态解算。尤其在中长远动态目标姿态测量中遮挡、变换过程中具有良好适应性，与现有典型姿态处理结果对比，验证了本文算法的正确性和可靠性。","PeriodicalId":51502,"journal":{"name":"激光与光电子学进展","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662330","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}
激光与光电子学进展Pub Date : 2023-01-01DOI: 10.3788/lop222705
李璐瑶 Li Luyao, 李忠伟 Li Zhongwei, 王雷全 Wang Leiquan, 李娟 Li Juan, 史顺晓 Shi Shunxiao
{"title":"基于空谱背景重构的半监督高光谱异常检测","authors":"李璐瑶 Li Luyao, 李忠伟 Li Zhongwei, 王雷全 Wang Leiquan, 李娟 Li Juan, 史顺晓 Shi Shunxiao","doi":"10.3788/lop222705","DOIUrl":"https://doi.org/10.3788/lop222705","url":null,"abstract":"为了充分利用高光谱图像的空间和光谱信息，同时缓解训练样本不足的问题，提出一种融合空谱特征的半监督高光谱异常检测模型。首先使用无监督聚类自动构建空谱背景数据集用于网络的训练。然后构建基于自动编码器和生成对抗网络的空谱双路模型分别用于背景光谱特征的学习和波段信息的重建，空间支路同时使用滤波器增大背景和异常间的差异，两路分别得到光谱异常分数和波段异常值。最后融合空谱特征得到异常检测图。在真实高光谱图像上验证该方法的有效性，实验结果表明，该方法优于传统的异常检测方法，平均检测精度达到99.55%。","PeriodicalId":51502,"journal":{"name":"激光与光电子学进展","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135662351","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}
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