Structured Light Fringe Projection Setup Using Optimized Acousto-Optic Deflectors

This paper presents a tunable multistripe structured light projection setup employing a pair of in-house-developed high-efficiency acousto-optic deflectors (AODs). The system is tunable over a wide bandwidth of spatial frequencies of the stripes patterns. The setup is achieving a symmetric beam deflection around the optical axis of the projector without the use of additional optics thanks to a prismatic design of the deflectors. The AODs are based on tangential phase-matching, high-frequency anisotropic interaction in paratellurite ( TeO₂). The use of such optimized AODs leads to a simple experimental configuration with increased dynamical characteristics of the stripes period; this feature is very useful for 3-D image reconstruction.