Fig. 1. Schematic diagram of segmented sub-mirror shape

Fig. 2. Effect of sprite size on the MTF of optical systems^[4]

Fig. 3. 3D model of the JWST and its primary mirror^[12]

Fig. 4. The segmented primary mirror scheme of the JWST^[12]

Fig. 5. Primary mirror and sub-mirror of TMT^[23]

Fig. 6. Schematic diagram of the TMT support system^[23]

Fig. 7. Schematic diagram of the piston and tip/tilt error

Fig. 8. 2π ambiguity of the piston error^[23]