Generation of Computer Generated Holograms with DMDs: a new concept

Abstract

Computer Generated Holograms (CGHs) are used for wavefront shaping and complex optics testing. We propose a Digital Micromirror Device (DMD) as a reconfigurable mask, to record rewritable binary and grayscale CGHs. A new Fourier CGH coding scheme, the Island algorithm, is proposed, with a quantification exceeding 1000 within smaller cell size of 2x2 pixels. An hologram has been calculated, recorded, reconstructed and tested successfully: the reconstructed image exhibits a perfect fidelity in shape and intensity, with a much higher resolution, a better compacity and an increased throughput. These results reveal the high potential of this method for generating programmable/rewritable CGHs.