Liu Xinyu, Zhu Jun
Opt Express. 2022 Feb 28;30(5):7954-7967. doi: 10.1364/OE.451511.
For off-axis reflective systems, there is no effective method that can obtain a small-volume starting point automatically. Reducing system volume using the optimization method is usually a difficult and cumbersome process, which usually takes the designer a long time. This paper proposes a method of designing small-volume starting points of freeform off-axis reflective imaging systems, which does not require human involvement after inputting a planar system, specifications and constraints. In the design example presented in this paper, it took only about ten minutes to obtain a small-volume starting point. The starting point obtained by this method makes the optimization process easier, takes less time of designers and more likely to succeed. In the design example, it is also demonstrated that the method has the ability of establishing small-volume starting points with different specifications, which can be used to quickly estimate the minimum volumes that systems with different specifications can achieve and provide guidance for determination of specifications and optimization.
对于离轴反射系统，没有一种有效的方法能够自动获得小体积的起始点。使用优化方法来减小系统体积通常是一个困难且繁琐的过程，这通常会花费设计者很长时间。本文提出了一种设计自由形式离轴反射成像系统小体积起始点的方法，在输入平面系统、规格和约束条件后，该方法无需人工干预。在本文给出的设计示例中，仅用了大约十分钟就获得了一个小体积的起始点。通过该方法获得的起始点使优化过程更轻松，花费设计者的时间更少，并且更有可能成功。在设计示例中，还证明了该方法具有建立不同规格小体积起始点的能力，可用于快速估计不同规格系统能够达到的最小体积，并为规格确定和优化提供指导。
