Yaqin SUN, Fan WANG, Jin YU, Ang ZHANG, Can ZHANG, Yuzhuo ZHANG, Nan GAO, Zhaozong MENG, Zonghua ZHANG. Distortion Measurement and Correction of Projector Based on Phase Target[J]. Acta Photonica Sinica, 2021, 50(9): 0912002
- Acta Photonica Sinica
- Vol. 50, Issue 9, 0912002 (2021)
Fig. 1. Logical block diagram of measuring distortion of full-field image
Fig. 2. Relationship between actual LCD display phase and ideal LCD display phase
Fig. 3. Flow chart for establishing mathematical model of ideal LCD display phase
Fig. 4. Distortion calibration process
Fig. 5. Distortion correction flow
Fig. 6. Relationship of actual LCD display phase， ideal LCD display phase and LCD reflection phase
Fig. 7. Calculating compensation phase flow
Fig. 8. Schematic diagram of brightness matching
Fig. 9. Brightness matching flow
Fig. 10. Experimental system
Fig. 11. Absolute phase diagram
Fig. 12. Schematic of the distortion calibration result of the projector
Fig. 13. Schematic of closed frame distortion
Fig. 14. Pre-compensated fringe image
Fig. 15. Schematic diagram of the change of the closed rectangle before and after pre-compensation in the LCD self-display phase
Fig. 16. 3D topography restoration map of the step
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Table 1. Fitting parameters of the horizontal fringe expansion phase plane
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Table 2. Fitting parameters of the vertical fringe expansion phase plane
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Table 3. Measurement accuracy of the distance between the step surface before and after calibration
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