Abstract: Optical devices that include one or more structures fabricated from polar-dielectric materials that exhibit surface phonon polaritons (SPhPs), where the SPhPs alter the optical properties of the structure. The optical properties lent to these structures by the SPhPs are altered by introducing charge carriers directly into the structures. The carriers can be introduced into these structures, and the carrier concentration thereby controlled, through optical pumping or the application of an appropriate electrical bias.

Abstract: The document describes a method of transforming available live video output from a camera into a format compatible for combination with existing single element detectors operating at various spectral bands to achieve improved performance for non-imaging, optical event detectors, especially for optical flame detectors. The method can utilize data that is becoming increasingly available because of the expanding deployment of surveillance cameras that are prevalent in many sensing and security devices and systems. Augmenting output from established OFD sensors with the data stream converted from the video output and incorporating viable algorithms can yield a detection method with improved performance with respect to both sensitivity and selectivity without requiring additional hardware deployment.

Abstract: Disclosed herein is an article having: a substrate and a RuO2 coating having nanoparticles of RuO2. Also disclosed herein is an article having: a substrate and a RuO2 coating. The coating is made by: immersing the substrate in a solution of RuO4 and a nonpolar solvent at a temperature that is below the temperature at which RuO4 decomposes to RuO2 and warming the substrate and solution to ambient temperature under ambient conditions to cause the formation of the coating.

Abstract: A method for detecting a fire while discriminating against false alarms in a monitored space containing obstructed and partially obstructed views includes the steps of positioning an infrared camera in a location where the camera has both a direct view of a first portion of the monitored space and an obstructed view of a second portion of the monitored space, the camera including a charge coupled device (CCD) array sensitive to wavelengths in the range of from about 400 to about 1000 nm and a long pass filter for transmitting wavelengths greater than about 700 nm; filtering out radiation wavelengths lower than about 700 nm; converting an electrical current from the CCD array to a signal input to a processor; processing the signal; and generating alarms when predetermined criteria are met to indicate the presence of a fire in one or both of the first portion of the monitored space and the second portion of the monitored space.