Fig. 1. Diagram of Ritchey-Common test and in-situ detection principle of Ritchey angle

Fig. 2. Interferogram of defocus based on SMR-Laser Interferometer

Fig. 3. Flowchart of Ritchey angle in-situdetection based on laser tracker

Fig. 4. Schematic diagram of sampling of intersected figure

Fig. 5. Defocus light path of SMR

Fig. 6. Schematic diagram of generatrix sampling

Fig. 7. Flowchart for modeling tested plane mirror

Fig. 8. Relationship between measurement accuracy of the Ritchey angle and the number of sampling points. (a) Intersected figure sampling; (b) generatrix sampling

Fig. 9. Effect of Zernike polynomial coefficient residual on significant digit of Ritchey angle

Fig. 10. Diagram of Φ430mmflat mirror testing

Fig. 11. Take points on the contour generatrix of the plane mirror

Fig. 12. System wave aberration distributions with different Ritchey angle. (a) System wave aberration distribution with θ1=21.12°; (b) system wave aberration distribution with θ2=39.18°

Fig. 13. Detected plane mirror shape

Fig. 14. Distribution of Zernike power coefficients

Fig. 15. Zernike power coefficient deviation and surface residual RMS for laser tracker measurement and compression ratio measurement. (a) Contrast of Zernike power coefficient deviation; (b) contrast of surface residual RMS

Fig. 16. Experimental setup of positioning focus point

Fig. 17. Distributions of geometric position and Zernike power coefficient in different F-number lenses. (a) 3.8; (b) 5; (c) 7; (d) 11

Fig. 18. Centering base of SMR