25 October 1993 Lensless 2D correlation experiments
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Converging light is used for a reference beam in constructing the Fourier transform of a filter for use in a 2-D correlator. This eliminates the need for the inverse Fourier transform lens used for performing correlation. We analyze this approach and demonstrate correct performance with optical experiments. Further, we propose a compact optical correlator system that uses only one curved element for both constructing filters and performing correlation.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alastair D. McAulay, Alastair D. McAulay, Junqing Wang, Junqing Wang, } "Lensless 2D correlation experiments", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); doi: 10.1117/12.160311; https://doi.org/10.1117/12.160311

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