Jian Yuan, Lei Zhang, Qifu Jiang, Siyu Pei, Xiaoxue Gong. Structure design of 1.2 m high lightweight primary mirror blank[J]. Opto-Electronic Engineering, 2023, 50(4): 220225

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- Opto-Electronic Engineering
- Vol. 50, Issue 4, 220225 (2023)

Fig. 1. Optical path of the coaxial three mirror camera

Fig. 2. Structure form of the primary mirror

Fig. 3. Layout of distributed datums on the mirror blank

Fig. 4. Measures for th higher lightweight mirror

Fig. 5. Print-through effective of the primary mirror under polishing

Fig. 6. Parametric modeling of the primary mirror blank

Fig. 7. Iteration of optimization process for the primary mirror blank

Fig. 8. Mechanical properties of the primary mirror blank. (a) Gravitational deformation nephogram; (b) The 1st order free vibration mode

Fig. 9. Manufacturing results of the primary mirror blank. (a) Mirror blank; (b) Centroid position test

Fig. 10. Optical processing of the primary mirror. (a) Polishing with the robot arm; (b) Interferogram
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Table 1. Physical properties of main materials for the large aperture mirror
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Table 2. Parameter ranges and optimization results (unit: mm)

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