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11 October 2012 Design and fabrication of imaging optical systems with freeform surfaces
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Freeform surfaces provide more degrees of freedom for design of optical systems, and enhance the ability of compensation and correction aberrations. Freeform surfaces are of advantage to balance the unsymmetrical aberrations, especially for the wide-field off-axis optical systems. This paper focus on an off-axis reflective optical system, which focal length is 550mm, F# is 6.5 and field of view (FOV) is 76°. The system adopts some freeform surfaces. We discuss the problems we noticed in processes of design, manufacture, measurement and alignment, and the solutions. At last, the periodical research result and the expected performance are given.
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Xin Zhang, Ligong Zheng, Xin He, Lingjie Wang, Feng Zhang, Shuqi Yu, Guangwei Shi, Binzhi Zhang, Qiang Liu, and Tongtong Wang "Design and fabrication of imaging optical systems with freeform surfaces", Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848607 (11 October 2012);

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