大口径干涉成像光谱仪扫描速度偏差的评估与校正  

Restoration of scanning speed deviation of the large aperture interference imaging spectrometer

作　　者：曹玮亮 廖宁放 吕航 吴文敏 程灏波 OAO Weiliang LIAO Ningfang LV Hang WU Wenmin OHENG Haobo(Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of China, School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China Beijing Institute of Technology, Shenzhen Institute, Shenzhen 518057, China)

机构地区：[1]北京理工大学光电学院光电成像技术与系统教育部重点实验室,北京100081 [2]北京理工大学深圳研究院,深圳518057

出　　处：《光学技术》2017年第5期400-404,共5页Optical Technique

基　　金：国家自然科学基金(61575020);国家科技支撑计划(2012BAK02B04)

摘　　要：大口径干涉成像光谱仪通过视场扫描和数据重组获取目标的干涉序列,理想情况下帧间视场移动量为1个像素。若扫描速度偏快或偏慢,按照正常重组算法得到的干涉序列不是源自同一目标,导致图像和光谱出现误差。根据像点在数据立方体中的移动规律,提出了像点轨迹追踪法进行校正,按照轨迹坐标对数据进行重采样获得同一目标的干涉序列信号并校正横向尺寸变形。并利用干涉立方体的投影图像对运动误差校正效果进行评估。The large aperture interference imaging spectrometer obtains the interference sequence of objects by field scanning and data reorganization.The ideal field displacement between the frames is 1pixel.If scanning speed is faster or slower,the interference sequence obtained according to the normal reorganization algorithm is not derived from the same object,resulting in errors to image and spectrum.With the rule of image points in the data cube,the image point trajectory tracking method is proposed,which can accurately extract the interference sequence signals of the same object and correct the transverse dimension deformation.The motion error correction effect is evaluated by using the projection image of the interference data cube.

关 键 词：干涉成像光谱仪 时空联合调制 扫描速度 评估 

分 类 号：TH744.1[机械工程—光学工程]