Yusheng Zhai, Wenlong Liu, Xinjie Wang, Zehua Xie, Saisai Yan, Yihang Guo. Methods for Laser Beam Drift Compensation in Laser Alignment Measurement[J]. Laser & Optoelectronics Progress, 2019, 56(7): 071203
- Laser & Optoelectronics Progress
- Vol. 56, Issue 7, 071203 (2019)
Fig. 1. Schematic of beam drifts caused by environmental factors. (a) Parallel drift model; (b) angular drift model
Fig. 2. Measurement principle of beam drift caused by air disturbance
Fig. 3. Spectral characteristics of beam drift caused by air disturbance. (a) Signal power spectrum; (b) signal processing result
Fig. 4. Measurement principle of two-dimensional displacement with laser beam drift compensation
Fig. 5. Optical path for differential compensation
Fig. 6. Result of angular drift compensation by differential structure
Fig. 7. Compensation effect of total drift by differential structure
Fig. 8. Common path compensation structure
Fig. 9. Compensation effect of angular drift by common path structure
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