1 November 1991 Miniature acousto-optic image correlator
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An acousto-optic (AO) image correlator architecture will be presented that minimizes the overall system size while maintaining excellent image quality for large input scenes. The correlator can accommodate gray-scale input scenes with dimensions of 512 X 244 pixels and gray-scale reference templates of 64 X 64 pixels. The size of the optical system, however, is less than 10 cubic inches, 1" X 1" X 9". This design incorporates a surface emitting laser diode array that has a center-to-center spacing of the laser elements matched to the row spacing on the CCD. Furthermore, the space-bandwidth and center frequency of the AO cell are chosen to match the length of the input image information in the cell to the width of the CCD. These two design decisions allow close to one-to-one imaging through the entire optical system producing the shortest possible path length. The optics were then designed with a goal of producing nearly diffraction-limited image quality.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Perry A. Molley, Perry A. Molley, William C. Sweatt, William C. Sweatt, David Scott Strong, David Scott Strong, "Miniature acousto-optic image correlator", Proc. SPIE 1564, Optical Information Processing Systems and Architectures III, (1 November 1991); doi: 10.1117/12.49745; https://doi.org/10.1117/12.49745

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