The method of generalized projections is used to design quantized phase holograms that generate gray-scale images. As the number of phase quantization levels decreases, the performance typically degrades. However, performance can be significantly improved by constraining the energy in mutually exclusive cliques of image-plane (far-field) pixels instead of constraining the intensity of each individual pixel. Performance is demonstrated with objective measures (error, efficiency, and variance) as well as with a subjective comparison of images.
© 1997 Optical Society of America
Original Manuscript: December 23, 1996
Revised Manuscript: April 10, 1997
Manuscript Accepted: April 10, 1997
Published: October 1, 1997
William C. Catino, Joseph L. LoCicero, and Henry Stark, "Design of continuous and quantized phase holograms by generalized projections," J. Opt. Soc. Am. A 14, 2715-2725 (1997)