Aliasing-based incoherent optical spatial image processor

Melania Paturzo; Pietro Ferraro; Alexander Zlotnik; Zeev Zalevsky

doi:10.1364/ao.48.005537

Aliasing-based incoherent optical spatial image processor

Melania Paturzo, Pietro Ferraro, Alexander Zlotnik, Zeev Zalevsky

National Research Council of Italy

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We present a configuration for a real-time spatial image processor that is based upon an imaging setup in which a grating with Fourier coefficients with tunable phase is attached to the object plane. The illumination that is used for the proposed concept is spatially incoherent. By proper adjusting of the magnification of the imaging system to the spatial period of the grating and the sampling grid of the camera, the aliasing effect due to the digital sampling realizes a nonuniform and tunable spectral distribution (a filter) that is applied over the spectrum of the object. Preliminary numerical and experimental demonstration of the operation principle is provided with a spatial LiNbO ₃ hexagonal grating.

Original language	English
Pages (from-to)	5537-5545
Number of pages	9
Journal	Applied Optics
Volume	48
Issue number	29
DOIs	https://doi.org/10.1364/ao.48.005537
State	Published - 10 Oct 2009

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Aliasing-based incoherent optical spatial image processor

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