Filtering tests for the alignment of a convergent correlator

Jose Nicolas; Juan Campos; Claudio C. Iemmi; Ignacio Soriano Moreno; Maria Josefa Yzuel

doi:10.1117/12.524645

19 November 2003 Filtering tests for the alignment of a convergent correlator

Jose Nicolas, Juan Campos, Claudio C. Iemmi, Ignacio Soriano Moreno, Maria Josefa Yzuel

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.524645
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

In this work we present a complete set of tests for the precise alignment of a convergent optical correlator. The alignment tests include the fine focusing of the input scene Fourier transform on the filter plane, the filter centering, the scaling of the scene Fourier transform to match the filter size, and the azimuth matching between the scene and the filter. These tests are based on spatial frequency filtering properties. We present the theoretical explanation and experimental results obtained during the alignment procedure.

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Jose Nicolas, Juan Campos, Claudio C. Iemmi, Ignacio Soriano Moreno, and Maria Josefa Yzuel "Filtering tests for the alignment of a convergent correlator", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.524645

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KEYWORDS

Fourier transforms

Image filtering

Optical correlators

Optical filters

Spatial light modulators

Diffraction

Diffraction gratings

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