Exact matching for row frequency of TDICCD camera under the big attitude angle scanning imaging
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1.Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033,China; 2.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130022, China; 3.Centre of Test Science, Jilin University, Changchun 130022, China; 4.School of Electronic and Information Engineering, Changchun University of Science and Technology, Changchun 130022, China

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TP391.4

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    Abstract:

    With wide field of TDI CCD camera at the push of the attitude Angle of image point in the process of scanning imaging like speed difference is bigger, the row frequency matching precision is not caused by higher camera function to drop, a kind of coarse and fine adjustment precision horizontal frequency matching method was put forward. First of all, the large field of TDI CCD camera as the main characteristic of the velocity field and as the key problems of speed matching was expounded; Secondly, in the big field of TDI CCD camera Angle side swing and swing pushed sweeping imaging before and after indepth analysis of the characteristics as velocity field; Then, according to the characteristics of the velocity field choose image speed matching mode of the same speed and the different speed, analysis the functional features, the using condition of each mode; Finally, this paper proposes a support of coarse and fine adjustment precision horizontal frequency matching method, and analysis of the accuracy of the implemented row frequency matching method, ultimately meet the requirements of a given row frequency matching accuracy. The experimental results show that the integral series for level 96, coarse adjustment method can make the precision of the row frequency 0.999 425, fine adjustment method can make the precision of the row frequency 0.999 928, two methods can make the camera pass letter MTF is better than 0.998, thus realize the wide field of TDICCD camera under the condition of all kinds of big push attitude Angle scanning imaging with high quality imaging.

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  • Received:
  • Revised:
  • Adopted:
  • Online: May 27,2016
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