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Hadamard multimode optical imaging transceiver

United States Patent

October 30, 2012
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Disclosed is a method and system for simultaneously acquiring and producing results for multiple image modes using a common sensor without optical filtering, scanning, or other moving parts. The system and method utilize the Walsh-Hadamard correlation detection process (e.g., functions/matrix) to provide an all-binary structure that permits seamless bridging between analog and digital domains. An embodiment may capture an incoming optical signal at an optical aperture, convert the optical signal to an electrical signal, pass the electrical signal through a Low-Noise Amplifier (LNA) to create an LNA signal, pass the LNA signal through one or more correlators where each correlator has a corresponding Walsh-Hadamard (WH) binary basis function, calculate a correlation output coefficient for each correlator as a function of the corresponding WH binary basis function in accordance with Walsh-Hadamard mathematical principles, digitize each of the correlation output coefficient by passing each correlation output coefficient through an Analog-to-Digital Converter (ADC), and performing image mode processing on the digitized correlation output coefficients as desired to produce one or more image modes. Some, but not all, potential image modes include: multi-channel access, temporal, range, three-dimensional, and synthetic aperture.
Cooke; Bradly J. (Los Alamos, NM), Guenther; David C. (Los Alamos, NM), Tiee; Joe J. (Los Alamos, NM), Kellum; Mervyn J. (Los Alamos, NM), Olivas; Nicholas L. (Los Alamos, NM), Weisse-Bernstein; Nina R. (Los Alamos, NM), Judd; Stephen L. (Los Alamos, NM), Braun; Thomas R. (Sterling, VA)
Los Alamos National Security, LLC (Los Alamos, NM)
12/ 249,763
October 10, 2008
STATEMENT REGARDING FEDERAL RIGHTS This invention was made with government support under Contract No. DE-AC52-06NA25396 awarded by the U.S. Department of Energy. The government has certain rights in the invention.