17 October 1997 Miniature ruggedized optical correlator (MROC) modules for space applications
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Abstract
Many image processing applications require small, low-power, low-cost pattern recognition systems that are capable of locating and identifying objects. Space applications require additional features such as environmental ruggedness, stability, and maintenance-free operation. Miniature optical correlators can perform two-dimensional pattern recognition at greater rates than digital platforms of equivalent size, power and/or weight. The patented Miniature Ruggedized Optical Correlator (MROC) module is built to meet the environmental, size, power, maintenance-free operation and weight requirements of military and commercial space applications, and at a cost that permits wide deployment of the capability. The second version of the MROC module consists of a ferroelectric liquid crystal (PLC) device in the input plane for high light efficiency and incorporates a reflective magneto optic spatial light modulator (RMOSLMTM) device in the filter plane for very high speed operation. MROC II breadboard tests demonstrated excellent correlation peaks, i.e. excellent discrimination (SNR>25), at pattern matching rates of 1920 per second on images of military vehicles.
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James P. Karins, Stuart A. Mills, James R. Ryan, Robert Barry Dydyk, John R. Lucas, "Miniature ruggedized optical correlator (MROC) modules for space applications", Proc. SPIE 3124, Photonics for Space Environments V, (17 October 1997); doi: 10.1117/12.283875; https://doi.org/10.1117/12.283875
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