Fig. 1. Model diagram of mapping camera

Fig. 2. Optical system model

Fig. 3. Thermal and mechanical analysis of the primary mirror components. (a) Surface deformation of the primary mirror under a 2 ℃ temperature increase; (b) surface deformation of the primary mirror under 1% adhesive shrinkage; (c) surface deformation of the primary mirror under forced displacement of 0.01 mm

Fig. 4. Thermal and mechanical analysis of the secondary mirror components. (a) Surface deformation of the secondary mirror under a 2 ℃ temperature increase; (b) surface deformation of the secondary mirror under 1% adhesive shrinkage; (c) surface deformation of the secondary mirror under forced displacement of 0.01 mm

Fig. 5. Design value of system wave aberration

Fig. 6. System wave aberration after compensating for the primary mirror astigmatism by the tertiary mirror assembly tilt

Fig. 7. System wave aberration after compensating for the secondary mirror astigmatism by the tertiary mirror assembly tilt

Fig. 8. Optical path for the primary mirror compensation testing

Fig. 9. Primary mirror assembly wave aberration before and after gluing. (a) Before gluing of primary mirror assembly; (b) after gluing of primary mirror assembly

Fig. 10. Secondary mirror assembly wave aberration before and after gluing. (a) Before gluing of secondary mirror assembly; (b) after gluing of secondary mirror assembly

Fig. 11. Co-referenced preliminary alignment layout

Fig. 12. Front camera lens wave aberration after coarse alignment. (a) -1 field of view; (b) 0 field of view; (c) +1 field of view

Fig. 13. Front camera lens wave aberration after tight alignment. (a) -1 field of view; (b) 0 field of view; (c) +1 field of view