Chen Li, Xu Zhang, Dawei Tu, Junhui Jia, Wei Cui, Can Zhang. Deflectometry Measurement Method of Single-Camera Monitoring[J]. Acta Optica Sinica, 2017, 37(10): 1012007
- Acta Optica Sinica
- Vol. 37, Issue 10, 1012007 (2017)
Fig. 1. Schematic of deflectometry measurement method of single-camera monitoring
Fig. 2. Schematic of calibration. (a) Mirror calibration method; (b) rigid transformation of coordinate system
Fig. 3. Deflectometry measurement system of single-monitoring
Fig. 4. Calibration of the positions of two cameras. (a), (b) and (c) are the fringe patterns from LCD captured by camera 1 through mirror reflection at three different positions; (d) is the fringe pattern from LCD captured by camera 2. The images in the red box represent the absolute phases
Fig. 5. Simulation of the radial basis function. (a) Gradient in x direction; (b) gradient in y direction; (c) surface calculated from gradient data by the radial basis function interpolation; (d) simulated surface height error
Fig. 6. (a) RMS error and (b) maximum error after introducing Gaussian noises in the simulation
Fig. 7. Absolute phases of phase shifting fringes of camera 1 and camera 2. (a) and (b) are the absolute phases of LCD at two positions captured by camera 1; (c) and (d) are the absolute phases of LCD at two positions captured by camera 2
Fig. 8. Mirror surface calculation results. (a) Gradient in x direction; (b) gradient in y direction; (c) gradient error in x direction; (d) gradient error in y direction; (e) surface calculation from gradient data by the radial basis function interpolation; (f) surface height error
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Table 1. Calibration results of the intrinsic parameters of cameraspixel
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