We present a radically new class of optical setup working with white-light illumination, namely, a chromatically compensated processor operating in the Fresnel domain. The optical configuration is a hybrid (diffractive–refractive) three-lens system that exhibits an intermediate achromatic Fresnel plane and an output image plane without chromatic distortion. As a first application of this optical arrangement we develop a parallel space-variant color pattern-recognition experiment with white light.
© 2002 Optical Society of America
(050.1970) Diffraction and gratings : Diffractive optics
(070.4560) Fourier optics and signal processing : Data processing by optical means
(070.5010) Fourier optics and signal processing : Pattern recognition
(220.1000) Optical design and fabrication : Aberration compensation
(220.4830) Optical design and fabrication : Systems design
G. Mínguez-Vega, J. Lancis, E. Tajahuerce, V. Climent, J. Caraquitena, and P. Andrés, "Broadband space-variant Fresnel processor," Opt. Lett. 27, 1926-1928 (2002)