Theoretical and experimental analyses of color-image pattern recognition using a multiwavelength Fresnel holographic filter (FHF) are presented. The FHF technique permits a greatly relaxed spatial-filter alignment requirement, use of a white-light source, negligible color cross talk, and high diffraction efficiency of the spatial filter.
© 1988 Optical Society of America
Original Manuscript: August 27, 1987
Manuscript Accepted: February 2, 1988
Published: June 1, 1988
Guo-Guang Mu, Dong-Qing Chen, and Zhao-Qi Wang, "Color-image correlation with a multiwavelength Fresnel holographic filter," Opt. Lett. 13, 434-436 (1988)