Bin WANG, Yichun DAI, Fangyu XU, Zhenyu JIN. Experimental Research on Calibration of the Segmented Mirror Edge Sensors Based on Point Spread Function[J]. Acta Photonica Sinica, 2022, 51(12): 1211001
- Acta Photonica Sinica
- Vol. 51, Issue 12, 1211001 (2022)
Fig. 1. Schematic of the circular aperture at the edge of the segmented mirror
Fig. 2. Theoretical diffraction pattern with piston error changing from -λ/4 to λ/4
Fig. 3. Cross-correlation curve of diffraction spot with piston of 0.11λ and template pattern
Fig. 4. The aperture of the micro-lens deviates from the center of the segment edge in the X direction
Fig. 5. Different alignment errors lead to piston error
Fig. 6. Cross-correlation curves of PSF and template when tip，tilt errors are 0.1″
Fig. 7. Optical detection scheme of the two-segmented mirror system
Fig. 8. Schematic diagram of the optical device arrangement of the two-segmented mirror system
Fig. 9. Piston generated by actuator displacement，piston measured by PSF cross-correlation detection method，and edge sensor readings
Fig. 10. The residuals of the measured values of the piston and PSF cross-correlation method and the measured values of the edge sensor generated by the displacement of the actuator
Fig. 11. 4D interferometer measurement results
Fig. 12. In closed-loop control，the change of the detected value of the PSF cross-correlation detection method and the change of the measured value of the edge sensor
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Table 1. Optical parameters of the two-segmented mirror system
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Table 2. Statistics of the residuals of the measured values of the cross-correlation
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Table 3. Statistics of residuals of actuator and edge sensor measurements
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Table 4. RMS and PV values of five edge detections
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