Diffraction Characteristics of a Digital Micromirror Device for Computer Holography Based on an Accurate Three-Dimensional Phase Model

A digital micromirror device (DMD) has a wide range of applications in holographic display, light field manipulation, etc., due to its high-speed refresh rates. In order precisely control the wavefront, influence array structure DMD requires careful analysis. Based on an accurate three-dimensional phase model DMD, we analyzed diffraction characteristics DMD. The was established by accurately describing distribution along each surface direction, and distance between point plane. results showed that orders are two groups micromirrors interfering with other, slight offset occurs when incidence angle is twice tilt angle, which can be removed adjusting angle. main all state approximated as plane wave, means hologram normally loaded without worrying about disturbance from structure. This provides great convenience for computer holography based Numerical simulations experiments demonstrated effectiveness work.