Fengrui Ma, Fajie Duan, Wenzheng Liu, Xiao Fu, Cong Zhang. Self-Calibration Method for Roll Angle Measurements of Dual Beams Based on Polarization[J]. Laser & Optoelectronics Progress, 2023, 60(23): 2312002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 23, 2312002 (2023)
Fig. 1. Structure diagram of self-calibration roll angle measurement based on polarization splitting
Fig. 2. Measuring principle of roll angle based on dual beam. (a) Optical configuration; (b) relationship between roll angle and light spot positions of QD1 and QD2
Fig. 3. Roll error measurement caused by non-parallelism. (a) Optical configuration; (b) position of light spot on QD1 and QD2
Fig. 4. Light path of roll angle based on dual beam
Fig. 5. Principle of roll angle measurement based on polarization splitting. (a) Optical configuration; (b) relationship between polarization direction and PBS attitude
Fig. 6. Incident angle deviates from the Brewster angle
Fig. 7. Flow chart of the self-calibration roll angle measurement
Fig. 8. Mechanical structure of measuring device
Fig. 9. Ground noise test experiments. (a) Shield; (b) ground noise test of QD; (c) ground noise test of PD
Fig. 10. Vertical straightness calibration experiment. (a) Experimental device; (b) performance test
Fig. 11. Repeatability error experiment
Fig. 12. Roll angle calibration experiment. (a) Experimental device; (b) performance test
Fig. 13. Non-parallelism measurement and calibration effect. (a) Non-parallelism measurement; (b) calibration effect
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Table 1. Accuracy improvement of roll angle based on dual beam
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