A direct-search method for the computer design of holograms is demonstrated. Two-dimensional, three-dimensional, and containing holograms with different levels of intensity (gray scales) were designed, fabricated, and optically reconstructed. The number of effective gray levels and the image-intensity noise and contrast are discussed. A modification of the state-variables cost function used in the direct-search algorithm that permits reliable control of gray scales is presented. Optical reconstructions of two-dimensional, three-dimensional, and gray-scale binary phase computer-generated holograms are presented.
© 1999 Optical Society of America
Matthew Clark, "Two-Dimensional, Three-Dimensional, and Gray-Scale Images Reconstructed from Computer-Generated Holograms Designed by use of a Direct-Search Method," Appl. Opt. 38, 5331-5337 (1999)