[1] TAO Xian，SUBBARAO Murali．Camera calibration and performance evaluation of depth from defocus(DFD) [J]. Proceedings of SPIE(S0277-786X)，2005，6000：100-109．

[2] DING Ya-lin，TIAN Hai-ying，WANG Jia-qi. Design on the focusing mechanism of space remote-sensing camera [J]. Opt. Precision Eng，2001，9(1)：35-36.

[3] SUBBARAO M，TYAN J K. The optimal focus measure for passive autofocusing and depth-from-focus [J]. Proceedings of SPIE(S0277-786X)，1995，2589：89-99.

[4] DING Cai-hong，XIE Qi-feng. Computer Aided Design of the Transverse Constant-Diameter Cam in the Tufted Machine [J]. Machine Design and Research，2007，23(5)：26-27.

[5] ZHANG Ji-chao，DING Ya-lin，ZHANG Hong-wen. Design for a kind of aerial frame camera's focusing structure [J]. OPTICAL INSTRUMENTS，2007，29(2)：50-51.

[6] YIN Ming-fu. Design theory，error analysis and one-side process principle of spatial cam mechanism and experiment research [D]. Xi’an：Xi'an University of Technology，2003.

[7] MAO Ying-tai. Error Theory and Precision Analusis [M]. Beijing：National Defence Industry Press，1982.

[8] WANG Zheng-gang. Computer Aided Testing Technology and Device for Symmetric Cams [D]. Wuhan：Huazhong University of Science and Technology，2005.

[9] HUANG Fu-gui. Accurate measurement of the cam ’s lift error in the three-coordinates measuring machine [J]. Opt. Precision Eng，2006，14(1)：112-115.

[10] LIN Ming-fa，YU Xiao-fen. Optimum Design of the Cam Curve of Two-variable-unit Zoom System Based on ZEMAX [J]. Opto-Electronic Engineering，2009，36(4)：60-61.