Measuring Dynamic 3D Micro-Structures Using a Superfast Digital Binary Phase-Shifting Technique

Binary phase-shifting in digital fringe projection has demonstrated significant merit over conventional sinusoidal phases-shifting methods in terms of measurement speed and simplicity. This paper will show that compared to conventional sinusoidal methods, binary defocusing 1) can better resolve 3D micro-structures; and 2) can achieve kilo-Hz 3D shape measurement rates. These features are critical for measuring dynamically deformable objects, such as the beating heart.