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[J]. Chinese Optics Letters, 2016, 14(6): 060801
- Chinese Optics Letters
- Vol. 14, Issue 6, 060801 (2016)
Fig. 1. Sketch of a coaxial three-mirror system.
Fig. 2. Layout of the coaxial three-mirror system.
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.
Fig. 6. Layout of the final design result.
Fig. 7. MTF curve of the final design.
Fig. 8. RMS wavefront error of the final system.
Fig. 9. Distortion grid of the final system.
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Table 1. Specifications of the Unobscured Off-Axis System
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Table 2. Coefficients of the Freeform Surfaces
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