[1] [1] XUE SH F, LI Q X. Precision Instrument Design[M].Beijing:Tsinghua University Press,1991:225-244.(in Chinese)

[2] [2] SUBBARAO M,TYAN J K. The optimal focus measure for passive autofocusing and depth-from-focus[J]. SPIE,1995,2589:89-99.

[3] [3] DING Y L, TIAN H Y,WANG J Q.Design on the focusing mechanism of space remote-sensing camera[J]. Opt. Precision Eng., 2001,9(1):35-38. (in Chinese)

[4] [4] ZHANG H W. Research on the anto-focusing technology for space camera[D].Beijing:Chinese Academy of Sciences,2003. (in Chinese)

[5] [5] REYNOLDSA G,HAMMONDA M,BINNSA L A. Camera correlation focus: an image-based focusing technique[J].SPIE,2005,5752:1032-1041.

[6] [6] HUANG H P, XIA Y H, AN CH B, et al.. Design on the focusing mechanism of long focus IR system[J].Laser & Infrared,2005,35(10):745-747.(in Chinese)

[7] [7] FEI Y T. Error Theory and Data Processing(Fourth Edition) [M].Beijing:China Machine Press,2003:52-55. (in Chinese)