J. Eur. Opt. Soc.-Rapid Publ.
Volume 16, Number 1, 2020
|Number of page(s)||9|
|Published online||19 April 2020|
Construct freeform surface directly in an initial layout of an off-axis reflective image system by seed curve extension and simulated annealing algorithm
School of Science, Jiangnan University, 214122, Wuxi, China
2 Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, 214122, Wuxi, China
Accepted: 31 March 2020
In this paper, a method of how to construct a freeform surface directly in an off-axis reflective image system is proposed. The method includes both the seed curve extension algorithm and simulated annealing algorithm. Firstly, the sample points on the unkown freeform surface were be obtained quickly by the seed curve extension algorithm. Then the continuity of the freeform surface is evaluated by calculating the angle between the normal vectors at the adjacent sample points. At last the freeform surface was fitted to an extended polynomials using simulated annealing algorithm. The method is employed to construct a freeform surface directly which is used as a primary mirror in an initial layout of an off-axis two-mirror system.
Key words: Freeform surface / Off-axis reflection system / Two-mirror system / Seed curve extension
© The Author(s) 2020
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