Fourier Transform Profilometry Based on Fiber-Optic Interferometric Projection

Technology of fiber-optic interferometric projection was used to develop a new way of three dimensional profilometry. The Young´s dual-pinhole interference fringe generated by the structure of Mach-Zehnder interferometer was projected to the object. And the mathematical model of the interferometer´s optic plane has been constructed to prove the feasibility of the projection method. The system is of high precision and can meet the application requirements of Fourier transform profilometry. High-speed CMOS camera is used in the image acquisition. And the whole optic path of the system uses fiber optic, which helps to realize the fiber optical integration and miniaturization of the system.