Honghao WANG, Jianli WANG, Tao CHEN, Yuyan CAO, Baogang CHEN. Measurement and calibration of optical axis changes caused by gravity for ground-based large-aperture telescope[J]. Optics and Precision Engineering, 2022, 30(23): 3021
- Optics and Precision Engineering
- Vol. 30, Issue 23, 3021 (2022)
Fig. 1. Schematic diagram of 4 m telescope
Fig. 2. Finite element model of four-meter telescope
Fig. 3. Angle deviations between primary and secondary mirror vs . elevation angle of telescope
Fig. 4. Position deviations between primary and secondary mirror vs . elevation angle of telescope
Fig. 5. Optical axis change of primary optical system vs . elevation angle of telescope
Fig. 6. Relative rotation and displacement between primary optical system and tracking optics
Fig. 7. Schematic diagram of determining telescope optical axis change
Fig. 8. Optical axis change of primary optical system by light source vs . angle of telescope elevation
Fig. 9. Optical axis change of primary optical system by star vs . elevation angle of telescope
Fig. 10. Schematic diagram of coma-free point
Fig. 11. Angle deviations between primary and secondary mirror after calibration vs . elevation angle of telescope
Fig. 12. Position deviations between primary and secondary mirror after calibration vs . elevation angle of telescope
Fig. 13. Optical axis change of primary optical system after calibration vs . angle of telescope elevation
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Table 1. Specifications of 4 m telescope
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