Accuracy analysis of focusing mechanism of high resolution space camera

被引：0
作者：
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] University of Chinese Academy of Sciences
来源：
Xu, Z. (xuzhitao2008@126.com) | 1600年 / Chinese Optical Society卷 / 33期
关键词：
Closed-loop; Error analysis; Focusing mechanism; Photoelectric encoder; Remote sensing; Space remote sensing camera; Transmission mechanism;
D O I：
10.3788/AOS201333.0728001
中图分类号：
学科分类号：
摘要：
In accordance with the characteristics of a high resolution space remote sensing camera, a focusing mechanism is designed to compensate for defocusing. The accuracy of focusing mechanism is analyzed from the transmission mechanism, the photoelectric encoder and the focusing control system. Before calculating the total errors of the focusing mechanism, all of the causes and values of error are discussed. After testing the accuracy of the focusing mechanism with closed-loop control mode, the data of the encoder codes and the focusing mirror displacements are processed respectively. Contrasting the results, the accuracy of the focusing mechanism is obtained, equal to ±3.1127 μm, which is in accordance with the theoretical value, and it proves that the design of the focusing mechanism is effective. Finally, the reason of differences between the accuracy results of the encoder codes and the focusing mirror displacements is obtained after analyzing the testing method. The experiments show that the accuracy of the focusing mechanism meets the camera's accuracy requirement of ±10 μm.
引用
收藏
相关论文
共 14 条
  • [1] Wang S., Li J., Liu L., Et al., Accuracy analysis of focusing mechanism in space camera with long-focal-plane, Optics and Precision Engineering, 18, 10, pp. 2239-2243, (2010)
  • [2] Chen S., Design and Experiment of Space Camera, pp. 27-28, (2003)
  • [3] Lu E., Yan C., Wu Q., Et al., Research on adaptability of optical remote sensors in mechanical and space thermal environments, Chinese J Optics and Applied Optics, 2, 5, pp. 364-376, (2009)
  • [4] Lan G., Wang X., Liang W., Et al., Optical design and thermal analysis for the active-focusing aerial camera objective, Acta Optica Sinica, 32, 3, (2012)
  • [5] Zhao Z., Liu J., Power spectra-based auto-focusing method for airborne optoelectronic platform, Acta Optica Sinica, 30, 12, pp. 3495-3500, (2010)
  • [6] Yang Y., Study on focusing technique for space optical camera, Spacecraft Engineering, 20, 2, pp. 20-24, (2011)
  • [7] Li C., Wang Z., Qiao K., Et al., Focusing techinque for three-line stereo mapping camera and realization, Opto-Electronic Engineering, 36, 10, pp. 41-46, (2009)
  • [8] Xu Z., Long K., Design of focusing control system for three-linear stereo mapping camera, J Electronic Measurement and Instrument, 26, 10, pp. 899-903, (2012)
  • [9] Shi S., Wang X., Liu J., Physical Optics and Applied Optics, pp. 406-407, (2008)
  • [10] Zhou J., Zhai L., Zhou G., Et al., Autofocus method of aerial imaging device, Acta Optica Sinica, 30, 1, pp. 105-108, (2010)
12