High-efficiency 3D reconstruction with a uniaxial MEMS-based fringe projection profilometry

Area of Science:

• Optics and Photonics
• Mechanical Engineering
• Computer Vision

Background:

• Micro-Electro-Mechanical System (MEMS) scanning offers compact structure and high frame-rate for 3D surface measurement.
• Uniaxial MEMS projectors face limitations due to lensless design and unidirectional fringe projection.

Purpose of the Study:

• To achieve real-time fringe structured 3D reconstruction using a uniaxial MEMS-based projector.
• To overcome the limitations of uniaxial MEMS projectors in 3D surface measurement.

Main Methods:

• A novel isophase plane model was developed, treating the laser line from the MEMS projector as an isophase plane.
• The model establishes a direct mapping between phase and 3D spatial coordinates via the intersection of camera back-projection rays and the isophase plane.
• A flexible calibration strategy using a custom planar target was implemented to determine 3D mapping coefficients.

Main Results:

• The proposed method successfully achieved real-time 3D reconstruction.
• Experimental results validated the high accuracy of the developed 3D surface measurement technique.
• The isophase plane model effectively addressed the limitations of uniaxial MEMS projectors.

Conclusions:

• The novel isophase plane model enables accurate and real-time 3D surface reconstruction with uniaxial MEMS projectors.
• This method offers a viable solution for compact, high-frame-rate 3D measurement systems.
• The flexible calibration strategy simplifies the implementation of MEMS-based 3D reconstruction.