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边缘视场检焦在航空遥感器中的应用

发布时间:2019-07-11 09:17 来源:未知 编辑:admin

  边缘视场检焦在航空遥感器中的应用_电子/电路_工程科技_专业资料。针对大面阵航空遥感器检焦存在的问题,提出了一种通过边缘视场检焦确定中心视场焦面位置的方法.通过倾斜安装与精密装调相结合的方法来提高检焦精度,检焦系统的倾斜安装能够解决边缘视场视场角对检焦的影响,利用显微镜装调、照相装调和电控校准来实现检焦像面的粗、精和精细标定,解决边缘视

  第42卷第4期 V01.42 No.4 红外与激光工程 Infr砌.ed and Laser Engineering 2013年4月 Apr.2013 边缘视场检焦在航空遥感器中的应用 张继超 (1.中国科学院航空光学成像与测量重点实验室,吉林长春130033; 2.中国科学院长春光学精密机械与物理研究所,吉林长春130033) 摘 要:针对大面阵航空遥感器检焦存在的问题,提出了一种通过边缘视场检焦确定中心视场焦面 位置的方法。通过倾斜安装与精密装调相结合的方法来提高检焦精度,检焦系统的倾斜安装能够解决 边缘视场视场角对检焦的影响,利用显微镜装调、照相装调和电控校准来实现检焦像面的粗、精和精 细标定,解决边缘视场与中心视场像面存在差异的问题。检焦系统的伺服控制采用粗精结合、遍历搜 索的方法搜索出焦面的最佳位置,搜索最短步长为o.olmm。经分析计算,检焦重复精度为o.03mm, 在焦深范围内,满足使用要求。经试验验证和试飞验证,证明该自动检焦方法检出的焦面准确,得到 的照片效果良好,该方法切实可行。 关键词:边缘视场检焦; 倾斜安装; 精密装调; 粗精结合 文章编号:1007—2276(2013)04一1038—06 中图分类号:TH745;V248.1 文献标志码:A AppHcation of auto—focusing丽th margin sensor neld for airborne remote Zhang Jichao (1.Key Laboratory of AirI)ome 0ptical Imaging aIld Measurement,chinese Academy of Science,ChaIlgchun 130033,china 2.Changchun Institute of optics,Fine MechaIlics alld Physics,Chinese Academy of Science,ChaIlgchun 130033,China) Abstract:To s01Ve me problem of auto—focusing in search position of focal plane in center 1鹕e were an.ay airbome remote iIl margin sensor,a memod to field mrou曲 auto—focusing taken to field was presented. Combination of oblique assembling aIld which could fine sening allgle in to impmVe precision of auto—focusing, settle the iIlfluence of field were ma唱in field.Microscope adjustment,photographic calibration and fine adjustment calibration and and electric of adjustment used the realize coarse calibration,accurate focal plane position and problem of difference between focal plane position in center in margin field was res01ved.In senrocontml of me auto?focusing system,coarse-to—fine alld ergodic metllod were taken to hunting find tlle optimum position of focal plane. MiIlimum step lengtll was 0.0lmm,aIld repeatabilit),precision was 0.03mm,wllich was witllin f酏a1 depm and met me requirement. After experiment and night test,focal plane that were in high was detected by this memod was accurate aIld tlle photo铲aphs quality. fine se仕ing; coaurse to Key words:focusing in ma唱in field;oblique assembling; fine 收稿日期:2012一09—05; 修订日期:2012一lO一09 基金项目:国家863计划(2006AA06A208);中国科学院知识创新领域前沿项目(070Y32R070) 作者简介:张继超(198l一),男,助理研究员,硕士,主要从事航空遥感器结构设计方面的研究。Email:zh锄舀ichao@sohu.com 万方数据

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