A lensless Vanderlugt optical correlator using two phase-only spatial light modulators (SLMs) is proposed. The SLMs are used for displaying input and filter patterns respectively. The SLMs are also used as programmable lenses in order to realize the lensless construction. This lensless system is simple and its alignment adjustment is easy. The performance of the SLMs as programmable lenses is also described.
© 2009 Chinese Optics Letters
(100.4550) Image processing : Correlators
(200.4740) Optics in computing : Optical processing
(230.6120) Optical devices : Spatial light modulators
(050.1965) Diffraction and gratings : Diffractive lenses
Norihiro Fukuchi, Takashi Inoue, Haruyoshi Toyoda, and Tsutomu Hara, "Lensless Vanderlugt optical correlator using two phase-only spatial light modulators," Chin. Opt. Lett. 7, 1131-1133 (2009)