Mathematics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spie.6219e..12d&link_type=abstract
Enabling Technologies and Design of Nonlethal Weapons. Edited by Shwaery, Glenn T.; Blitch, John G.; Land, Carlton. Proceeding
Mathematics
Scientific paper
OPTRA presents a new approach to remote infrared temperature measurements over mid to long standoff ranges in varying atmospheric conditions. The sensor is intended as a feedback mechanism for use with the Active Denial System to insure the target's skin temperature is within a safe range. OPTRA's sensor employs a small reflector telescope followed by a series of interference filters which form spatially identical but spectrally separated images on two miniature uncooled microbolometer focal plane arrays. On a pixel by pixel basis, we algebraically combine and normalize the two images. By carefully selecting the spectral passbands of the two images, the mathematical process yields a result that is substantially free of errors caused by humidity, rain, light fog, and atmospheric carbon dioxide. The package measures six x six x 18-inches and weighs six lbs. The package includes an on-axis miniature visible imager, and the graphical user interface presents a fused visible/infrared image with user-defined transparency levels. The visible/infrared combination provides good spatial resolution at large distances and ease of pointing along with the accurate temperature measurement across the field of view.
Carlson David
Dupuis Julia R.
Genetti George
Mansur David
Schundler Elizabeth
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