Imaging MTF of space camera under vibration and simulation

ZHANG Ying

doi:10.3788/OPE.20111909.2146

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Imaging MTF of space camera under vibration and simulation

Article | 更新时间：2020-08-12

- Imaging MTF of space camera under vibration and simulation
- Optics and Precision Engineering Vol. 19, Issue 9, Pages: 2146-2153(2011)
- 作者机构：
  
  长春理工大学,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20111909.2146
  CLC： V447.3
- Received：07 July 2011，
  
  Revised：29 July 2011，
  
  Published Online：26 September 2011，
  
  Published：26 September 2011
- 稿件说明：
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张影. 空间相机的颤振成像调制传递函数及仿真实验[J]. 光学精密工程, 2011,19(9): 2146-2153

ZHANG Ying. Imaging MTF of space camera under vibration and simulation[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2146-2153
张影. 空间相机的颤振成像调制传递函数及仿真实验[J]. 光学精密工程, 2011,19(9): 2146-2153 DOI： 10.3788/OPE.20111909.2146.

ZHANG Ying. Imaging MTF of space camera under vibration and simulation[J]. Editorial Office of Optics and Precision Engineering, 2011,19(9): 2146-2153 DOI： 10.3788/OPE.20111909.2146.

摘要

为实现对卫星平台力学环境的合理约束

研究了空间相机颤振与成像调制传递函数(MTF)下降的关系。通过理论分析

建立了基于统计矩的颤振传递函数的数学模型

实现了在特定函数振动和已知振动曲线情况下对MTF下降曲线的计算。针对某空间相机

利用MATLAB软件的图形用户接口(GUI)编制了颤振成像MTF计算软件

计算了在有随机噪声的正弦型振动情况下不同振动幅值和频率对应的MTF值

得出该相机对于平台颤振的要求为:在0.04 ms积分时间内其振动角幅值小于0.05

并避免相机产生200 Hz以上的振动。通过半物理仿真实验

对非函数形式的任意振动导致的传递函数下降进行深入分析

在图像的像质退化与振动传递函数之间建立了联系。用图像分析的方法计算了传递函数

结果与数学模型计算得到的传递函数趋势一致。

Abstract

The relationship between the vibration of a space camera and its Modulate Transfer Function (MTF) degeneration is investigated. A suitable limitation for a satellite platform is developped through this research. Mathematical modeling of a vibrating MTF is calculated based on a vibration moment method.The MTF curve can be deduced from the vibration functions or curves. The vibrating MTF calculations uses Graphic User Interface (GUI) to develop an software for some space cameras. MTF values under sinusoidal vibrations contain random noise and are calculated with different amplitudes and frequencies.Requirements of the satellite platform vibration is that the angle amplitude of vibration must be less than 0.05

and the vibration frequency should not be more than 200 Hz. MTF degeneration caused by random vibration is analyzed by simulation to relate image quality degeneration with MTF vibration. Image analysis for the MTF shows good agreements with the MTF calculated by the vibration model.

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references

耿文豹, 翟林培, 丁亚林. 振动对光学成像系统传递函数影响的分析[J]. 光学精密工程, 2009, 17(2):314-320. GENG W B,ZHAI L P,DING Y L. Analysis of influence of vibration on transfer function in optics imaging system [J]. Opt. Precision Eng., 2009,17(2):314-320.(in Chinese)[2] ZHAN G L J , L EE C M ,WAN G Y S. A study on non-stationary , random vibration of a vehicle in time and frequency domains [J]. International Journal of Automotive Technology, 2002,3(3):101-109.[3] 陈丁跃. 光学精密航天仪器运载中的环境振动试验研究[J]. 仪器仪表学报, 2006, 27(7):711-714. CHEN D Y. Research on environment vibration experiment upon optical precision space flight apparatus during transportation[J]. Chinese Journal of Scientific Instrument, 2006, 27(7):711-714.(in Chinese)[4] 王晶, 高利民,姚俊峰. 机载测量平台中的坐标转换误差分析[J]. 光学精密工程, 2009, 17(2):388-394. WANG J, GAO L M, YAO J F. Analysis on coordinate conversion error of airborne measuring device [J]. Opt. Precision Eng., 2009,17(2):388-394.(in Chinese)[5] JOEL A, PAUL S. Effects of base motion on space based precision laser tracking in the relay mirror experiment [J]. SPIE, 1991, 1482:170-181.[6] 王俊,王家骇,卢锷. 图像二维运动时的光学传递函数计算[J]. 光学学报,2001,21(5):581-585. WANG J, WANG J Q, LU E. Calculation of optical transfer function with two-dimensional image motion [J]. Acta Optica Sinica, 2001,21(5):581-585.(in Chinese)[7] HADAR O,DROR I,KOPEIKA N S. Numerical calculation of MTF for image motion: experimental verification[J]. SPIE, 1992, 1697:183-197.[8] LEGER D,DUFFAUT J, ROBINET F. MTF Measurement using spotlight. IEEE Proceedings of IGARRS, 1994:2010-2012.[9] RAUCHMILLER R F, SCHOWENGERDT R A. Measurement of landsat thematic mapper modulation transfer function using an array of point sources [J]. Optical Engineering, 1988,27(4):334-343.[10] LENCIONI D E,DIGENIS C J,BICLRNELL W E,et al.. Design and performance of the EO-1 Advanced land imager. SPIE Conference on Sensors, Systems and Next Generation Satellites III, Florence, Italy, September, 1999:1-12.[11] SCHOWENGERDT R A,BASEDOW R W,COLWELL J E,et al.. Measurement of the HYDICE system MTF from flight imagery [J]. SPIE,1996, 2821:127-136.[12] SCHOWENGERDT R A,ARCHWAMETY C,WRIGLEY R C. Landsat thematic mapper image-derived MTF [J]. Photogrammetric Engineering and Remote Sensing, 1985, 51(9):1395-1406.

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