Volume 6 Issue 6
Dec.  2013
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LIU Bing-qiang, ZHANG Fan, LI Jing-lin, XU Yan-jun, SUN Bin. Analysis of synchronous motion error for focusing mechanism of space camera[J]. Chinese Optics, 2013, 6(6): 946-951. doi: 10.3788/CO.20130606.946
Citation: LIU Bing-qiang, ZHANG Fan, LI Jing-lin, XU Yan-jun, SUN Bin. Analysis of synchronous motion error for focusing mechanism of space camera[J]. Chinese Optics, 2013, 6(6): 946-951. doi: 10.3788/CO.20130606.946

Analysis of synchronous motion error for focusing mechanism of space camera

doi: 10.3788/CO.20130606.946
  • Received Date: 11 Sep 2013
  • Rev Recd Date: 17 Nov 2013
  • Publish Date: 10 Dec 2013
  • The effect of synchronous motion error for the focusing mechanism of a space camera on the image quality is explored. For a large size focusing mechanism, the paper analyzes the reasons causing the synchorman motion error. According to the optical system parameters of a certain space camera, it draws a conclusion that when the Modulation Transfer Function(MTF) of the optical system declines no more than 5%, the allowable maximum error of synchronous motion is 0.02 mm. Then, based on the focusing mechanism, we deduce the formula of synchronous motion error and calculate that the maximum error of synchronous motion is 0.015 mm. Finally, the actual errors of synchronous motion before and after a vibration test are measured to be 0.012 mm and 0.013 mm respectively, which indicates that the focusing mechanism has great stability. Both the theoretical analysis and the experiments demonstrate that this focusing mechanism meets the requirements of practical application quite well.

     

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