TY - GEN
T1 - Designing an all-reflective, long focus and large field of view optical system with freeform surface
AU - Wang, Qingfeng
AU - Cheng, Dewen
AU - Wang, Yongtian
AU - Liu, Yue
PY - 2012
Y1 - 2012
N2 - All-reflective optical system has been widely used in the deep space detection applications. We studied the application of freeform surface in all-reflective, off-axis optical systems, which have long effective focal length and large field of view, were designed. The freeform surface was employed to achieve better performance, while reduce the system size and weight. The starting point of the design was calculated by using the geometrical optics and properties of conic. After that we optimized the starting point using the strategy of successive approximation optimization method to reduce the design difficulty. Based on the theory of aberration, the best position of freeform surface in the off-axis system was analyzed. At last, two four-mirror optical systems with long EFL and large field of view were designed, the effective focal length are 1.95m and 4.5m, respectively; the field of view for both systems are 3°. The modulation transfer function is close to diffraction limit.
AB - All-reflective optical system has been widely used in the deep space detection applications. We studied the application of freeform surface in all-reflective, off-axis optical systems, which have long effective focal length and large field of view, were designed. The freeform surface was employed to achieve better performance, while reduce the system size and weight. The starting point of the design was calculated by using the geometrical optics and properties of conic. After that we optimized the starting point using the strategy of successive approximation optimization method to reduce the design difficulty. Based on the theory of aberration, the best position of freeform surface in the off-axis system was analyzed. At last, two four-mirror optical systems with long EFL and large field of view were designed, the effective focal length are 1.95m and 4.5m, respectively; the field of view for both systems are 3°. The modulation transfer function is close to diffraction limit.
KW - All-reflective system
KW - Optical freeform surface
KW - Optics design
KW - Optimization
UR - https://www.scopus.com/pages/publications/84880106886
U2 - 10.1117/12.999504
DO - 10.1117/12.999504
M3 - Conference contribution
AN - SCOPUS:84880106886
SN - 9780819493125
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Design and Testing V
T2 - Optical Design and Testing V
Y2 - 5 November 2012 through 7 November 2012
ER -