SPIE Proceedings [SPIE 4th International Symposium on Advanced Optical Manufacturing and testing technologies: Optical Test and Measurement Technology and Equipment - Chengdu, China (Wednesday 19 November 2008)] 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment - Distortion measurement and calibration technology research of automatic observing and aiming optical system based on CCD