Chinese Optics Letters, Volume. 14, Issue 6, 060801(2016)
Compact freeform off-axis three-mirror imaging system based on the integration of primary and tertiary mirrors on one single surface
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Fig. 3. Layout of the unobscured system. This system is taken as the starting point for further optimization.
Fig. 4. Constraints to eliminate the light obscuration and to control the size of the system.
Fig. 5. Change in the average RMS wavefront error after adding different variables during the optimization process.
Table 1. Specifications of the Unobscured Off-Axis System
View tableView in ArticleTable 1. Specifications of the Unobscured Off-Axis System
Parameter Specification FOV F-number 2.5 Effective focal length 100 mm Entrance pupil diameter 40 mm Configuration Off-axis three-mirror Wavelength 8–12 μm
Table 2. Coefficients of the Freeform Surfaces
View tableView in ArticleTable 2. Coefficients of the Freeform Surfaces
Term M1-M3 Surface M2 Surface −0.0032743 −0.0060015 −0.016106 −0.900757 1.77941 × 10−5 1.53297 × 10−3 −1.77941 × 10−5 −1.53297 × 10−3 −4.97703 × 10−7 1.11944 × 10−5 −4.30829 × 10−7 1.75717 × 10−5 7.37848 × 10−11 −6.21792 × 10−8 −2.76034 × 10−9 6.60508 × 10−8 −1.52054 × 10−9 4.11465 × 10−9 −1.46970 × 10−12 2.02501 × 10−10 −7.85854 × 10−12 −7.66867 × 10−10 −3.08645 × 10−12 −1.54694 × 10−10
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Tong Yang, Jun Zhu, Guofan Jin, "Compact freeform off-axis three-mirror imaging system based on the integration of primary and tertiary mirrors on one single surface," Chin. Opt. Lett. 14, 060801 (2016)
Paper Information
Category: Geometric Optics
Received: Dec. 24, 2015
Accepted: Mar. 25, 2016
Published Online: Aug. 3, 2018
The Author Email: Jun Zhu (j_zhu@tsingua.edu.cn)
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