Linear sinusoidal phase-shifting method resistant to non-sinusoidal phase error

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（3）
• 页码范围: 39-42
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.031201

摘要

Non-sinusoidal phase error is common in structured light three-dimensional (3D) shape measurement system,thus we perform theoretical and experimental analyses of such error.The number of non-sinusoidal waveform errors in a 2π phase period is the same as the number of steps of the phase-shifting algorithm; no errors occur within the one-phase period.Based on our findings,a new structured light method,the linear sinusoidal phase-shifting method (LSPS),that is resistant to non-sinusoidal phase error is proposed.Experiments show that the non-sinusoidal waveform error is reduced to an almost negligible level (0.001 rad)using the proposed LSPS.