A real-time 3D range image sensor based on a novel tip-tilt-piston micromirror and dual frequency phase shifting. - Øystein Skotheim; Henrik Schumann-Olsen; Jostein Thorstensen; Anna N. Kim; Matthieu Lacolle; Karl-Henrik Haugholt; Thor Bakke (Three-Dimensional Image Processing, Measurement (3DIPM), and Applications, 2015)