Yu Zhang. Two-Step Random Phase Shifting Algorithms Based on Fast Least-Squares Method[J]. Acta Optica Sinica, 2021, 41(3): 0312003
- Acta Optica Sinica
- Vol. 41, Issue 3, 0312003 (2021)
Fig. 1. Simulated phase distribution and two phase shifted interferograms. (a) Theoretical phase distribution; (b) first and (c) second interferograms
Fig. 2. Phase distributions extracted by different phase shifting algorithms in three different situations
Fig. 3. Phase error distributions of different phase shifting algorithms in three different situations
Fig. 4. Iterative curves of different phase shifting algorithms in three different situations
Fig. 5. RMS phase errors and computational time of different algorithms in three different situations. (a) RMS phase errors; (b) computational time
Fig. 6. Simulation results of SD2&FLSA with different numbers of chosen pixels when size of interferogram is 401 pixel×401 pixel. (a) Number of iterations; (b) computational time; (c) RMS phase error; (c) phase shifting error
Fig. 7. Simulation results of SD2&FLSA with different numbers of chosen pixels when size of interferogram is 801 pixel×801 pixel. (a) Computational time; (b) RMS phase error
Fig. 8. RMS phase errors of SD2&FLSA with different phase shifts in six different situations
Fig. 9. Experimental phase shifted interferograms and phase distribution. (a) First and (b) second interferograms; (c) reference phase distribution extracted by four-step phase shifting algorithm
Fig. 10. Experimental results of different algorithms. (a)--(f) Phase distributions; (g)--(l) phase error distributions; (m)--(o) iterative curves
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Table 1. PV and RMS values of phase distributions extracted by different algorithms as well as RMS phase errors and computational time of different algorithms
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