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Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process

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Abstract

In this Letter, we propose a novel configuration and design method of freeform, dual fields-of-view (FOVs), dual focal lengths, off-axis three-mirror zoom imaging systems. The switch of the two zooms is achieved by rotating a single mirror element. The design of a freeform, dual focal lengths zoom system is realized by a point-by-point design approach for the first time to our knowledge. This method enables the direct design of freeform surfaces from initial planes using given system specifications and configuration, and the designed system can be taken as a good starting point for further optimization. A freeform, dual FOVs, dual focal lengths, off-axis three-mirror zoom system is demonstrated. The F-numbers of the two zooms are 2 and 2.4. The dual FOVs are 3°×3° and 2.5°×2.5°. After final optimization, both of the zooms achieve high performances.

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DOI:10.3788/col201614.100801

所属栏目:Geometric optics

收稿日期:2016-06-14

录用日期:2016-08-26

网络出版日期:2016-09-30

作者单位    点击查看

Tong Yang:State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
Jun Zhu:State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
and Guofan Jin:State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China

联系人作者:联系作者(j_zhu@tsingua.edu.cn)

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引用该论文

Tong Yang, Jun Zhu, and Guofan Jin, "Design of a freeform, dual fields-of-view, dual focal lengths, off-axis three-mirror imaging system with a point-by-point construction-iteration process," Chinese Optics Letters 14(10), 100801 (2016)

CrossRef返回数据

【1】Qingyu Meng, Hongyuan Wang, Zhiqiang Yan. Residual aberration correction method of the three-mirror anastigmat (TMA) system with a real exit pupil using freeform surface. Optics & Laser Technology, 2018, 106(): 100

【2】Ruirui Tang, Benqi Zhang, Guofan Jin, Jun Zhu. Multiple surface expansion method for design of freeform imaging systems. Optics Express, 2018, 26(3): 2983 

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