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星载离轴多光谱相机焦平面的装调与检测

梅贵 翟岩 苗健宇 浦前帅 余达 张博研

梅贵, 翟岩, 苗健宇, 浦前帅, 余达, 张博研. 星载离轴多光谱相机焦平面的装调与检测[J]. 中国光学, 2016, 9(4): 491-500. doi: 10.3788/CO.20160904.0491
引用本文: 梅贵, 翟岩, 苗健宇, 浦前帅, 余达, 张博研. 星载离轴多光谱相机焦平面的装调与检测[J]. 中国光学, 2016, 9(4): 491-500. doi: 10.3788/CO.20160904.0491
MEI Gui, ZHAI Yan, MIAO Jian-yu, PU Qian-shuai, YU Da, ZHANG Bo-yan. Focal plane alignment and testing for an off-axis multispectral space borne camera[J]. Chinese Optics, 2016, 9(4): 491-500. doi: 10.3788/CO.20160904.0491
Citation: MEI Gui, ZHAI Yan, MIAO Jian-yu, PU Qian-shuai, YU Da, ZHANG Bo-yan. Focal plane alignment and testing for an off-axis multispectral space borne camera[J]. Chinese Optics, 2016, 9(4): 491-500. doi: 10.3788/CO.20160904.0491

星载离轴多光谱相机焦平面的装调与检测

doi: 10.3788/CO.20160904.0491
基金项目: 

国家自然科学基金资助项目 No.61405191

吉林省科技发展计划青年科研基金资助项目 No.20150520102JH

详细信息
    通讯作者:

    梅贵(1984-),男,江苏高邮人,助理研究员,2006年、2009年于清华大学分别获得学士、硕士学位,主要从事空间遥感器光机结构设计方面的研究。E-mail:meigui840428@163.com

  • 中图分类号: V447+.1;V443+.5

Focal plane alignment and testing for an off-axis multispectral space borne camera

Funds: 

National Science Foundation of China No.61405191

Jilin Provincial Project of Science & Technology Development of China No.20150520102JH

More Information
  • 摘要: 针对某离轴多光谱相机焦平面高精度的装调要求,设计了焦平面组件,阐述了装调、检测的仪器设备和方法。首先将焦平面组件安装至镜头,测量并解算出CCD光敏面的角度和位移偏差,接着根据偏差确定调整垫修研量,进行初次修垫并重新安装,然后利用调整工装微调CCD姿态至满足指标要求,调整垫处打销钉定位,最后根据拟合出的最佳焦平面位置再次修研调整垫,利用销钉复位完成装调工作。检测结果表明,相机的CCD光敏面相对于设计焦平面三维角度偏差分别为Δα=-6.7",Δβ=1.9',Δγ=13.2",三维位移偏差分别为Δx=-0.004 mm,Δy=0.006 mm,Δz=-0.070 mm,相机四谱段、全视场MTF优于0.25,满足设计和装调要求。测量和解算误差分析表明,所用的设备与方法能够满足装调精度的要求,可以为此类相机的研制提供一定的技术参考。
  • 图  1  多光谱相机光学系统示意图

    Figure  1.  Schematic of optical system of a multispectral camera

    图  2  多光谱CCD结构示意图

    Figure  2.  Schematic of multispectral CCD geometry

    图  3  焦平面组件结构简图

    Figure  3.  Diagram of focal plane subassembly

    图  4  焦平面-调焦组件结构示意图

    Figure  4.  Schematic of focal plane-focusing subassembly

    图  5  螺钉连接偏差示意图

    Figure  5.  Schematic of screw fastening deviation sketch

    图  6  焦平面装调装置示意图

    Figure  6.  Schematic of equipments for focal plane alignment

    图  7  整机结构示意图

    Figure  7.  Structure schematic of the camera

    图  8  显示器显示标记点示意图

    Figure  8.  Schematic of pixel mark in screen

    图  9  焦平面微调工装

    Figure  9.  Schematic of fine-tuning mechanism of the focal plane

    图  10  MTF-调焦曲线

    Figure  10.  Curve of MTF-focusing

    图  11  全视场MTF对比图

    Figure  11.  Comparison curve of all-field MTFs

    图  12  多光谱相机外景成像试验图

    Figure  12.  Outdoor imaging test of the camera

    表  1  焦平面装调偏差实测结果

    Table  1.   Results of alignment deviations

    ParametersΔαΔβΔγΔx/mmΔy/mmΔz/mm
    Deviations-6.7″1.9′13.2″-0.0040.006-0.070
    Requirements±15″±4′±30″±0.04±0.02±0.1
    下载: 导出CSV

    表  2  相机四谱段MTF检测结果

    Table  2.   Four-spectral MTFs of the camera

    FieldMTF(B)MTF(G)MTF(R)MTF(NIR)MTF(Lens)
    -1ω0.3320.3550.3400.2650.681
    -0.5ω0.3410.3660.3470.2710.705
    0ω0.3430.3700.3510.2730.712
    +0.5ω0.3420.3680.3490.2720.709
    +1ω0.3340.3580.3440.2680.689
    下载: 导出CSV

    表  3  焦平面装调中的各种误差

    Table  3.   Errors in focal plane alignment progress

    Error TypeValue
    2-DOF turntable alignment,σ10.5″
    Leicatheodolite alignment,σ20.7″
    Camera alignment,σ31″
    Optical axis orientation,σ41.5″
    Leicatheodolite measurement,σ51.0″
    Collimator alignment,σ61.0″
    Collimator measurement,σ70.5″
    Focusing mechanism position,σ84 codes
    Least-squarefitting,σ96 codes
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-03-16
  • 修回日期:  2016-04-28
  • 刊出日期:  2016-08-01

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