光学学报, 2020, 40 (8): 0808001, 网络出版: 2020-04-13
基于自由曲面的大视场离轴反射光学系统设计
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Design of Off-Axis Reflective Optical System with Large Field-of-View Based on Freeform Surfaces
几何光学 离轴反射系统 自由曲面 大视场 geometric optics off-axis reflective optical system freeform surface large field-of-view
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摘要
Abstract
The off-axis reflective optical system with large field-of-view can obtain more abundant information resources, which is the development trend of the future space optical systems. The application of freeform surfaces in off-axis reflective optical systems can increase the field-of-view, but freeform off-axis reflective optical systems with large field-of-view are difficult to design due to fewer initial configurations and complicated optimization processes. In this paper, a design method for the freeform off-axis reflective optical system with large field-of-view is proposed. First, the unobscured freeform initial system with good imaging quality is directly obtained based on the vector aberration theory and the Fermat principle. Then, the final freeform optical system is obtained after simple optimization. This method can reduce the design difficulty of a freeform off-axis reflective optical system with large field-of-view. A freeform off-axis three-mirror optical system with a field-of-view of 30°×3° and an F number of 2 is designed, which verifies the effectiveness of the proposed method.
操超, 廖胜, 廖志远, 白瑜, 陈炳旭, 范真节. 基于自由曲面的大视场离轴反射光学系统设计[J]. 光学学报, 2020, 40(8): 0808001. Chao Cao, Sheng Liao, Zhiyuan Liao, Yu Bai, Bingxu Chen, Zhenjie Fan. Design of Off-Axis Reflective Optical System with Large Field-of-View Based on Freeform Surfaces[J]. Acta Optica Sinica, 2020, 40(8): 0808001.