Xing Zhong, Chi Ma, Yanjie Li, Runshan Liu. Field Curvature Characteristics and Alignment Method for the Off-Axis Three-Mirror Optical System with Wide Field-of-View[J]. Acta Optica Sinica, 2021, 41(9): 0922001
- Acta Optica Sinica
- Vol. 41, Issue 9, 0922001 (2021)
Fig. 1. Schematic of aberration contribution when optical element is tilted
Fig. 2. Focal plane tilt caused by misalignment of plane-field optical system
Fig. 3. Schematic of offset field curvature compensation method
Fig. 4. Optical system of a space camera
Fig. 5. Image quality of optical system design. (a) MTF curve of optical system; (b) wave aberration coefficient of optical system
Fig. 6. MTF of optical system using focal-plane tilt compensation and tilt angle of focal plane
Fig. 7. Process of optical system alignment
Fig. 7. Schematic of assembly focal plane and position coordinates of measuring points
Fig. 8. Auto-collimating interference test site
Fig. 10. MTF test site and fringe image
Fig. 11. MTF measurement results of group A focal plane
Fig. 12. Optimal position of focal plane by group linear fitting
Fig. 13. Comparison of MTF before and after focal plane amendment
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Table 1. Tertiary mirror installation accuracy requirements under different number of FOV groups
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