COMMERCIAL VISION SYSTEMS In the last few years thermal imaging has found its way into many more commercial applications. Most of these applications require a low cost product with an uncooled detector. These sensors image in the LWIR, or longwave infrared band (7 14 μm). Different types of uncooled detectors are available on the market. Since the infrared detector is the heart of any thermal i...

Type-II superlattices (T2SLs) hold enormous potential for 8 – 14μm long-wavelength infrared (LWIR) photodetection at high operating temperature (HOT). This review highlights recent developments towards HOT applications. Minority carrier lifetime and diffusion length of T2SLs are examined to appraise the extent which they limit performance LWIR detectors strategies mitigating these limitations e...

Wavelength-selective infrared (IR) absorbers have attracted considerable interest due to their potential for a wide range of applications. In particular, they can be employed as advanced uncooled IR sensors that identify objects through their radiation spectra. Herein, we propose a mushroom plasmonic metamaterial absorber incorporating tube-shaped metal posts (MPMAT) for use in the long-wavelen...

1 This work was sponsored by the U.S. Defense Advanced Research Projects Agency, under Air Force Contract F19628-95-C-0002. Opinions, interpretations, conclusions, and recommendations are those of the authors and not necessarily endorsed by the U.S. Air Force. 2 Present Address: MCIS Department, Jacksonville State University, Jacksonville, AL 36265, U.S.A. Abstract We present methods and result...

We report the performances of LWIR (λc = 9.0 μm at 80K) HgCdTe electron injected avalanche photodiodes (e-APD). In these devices, the exponential gain curve, up to gains equal to 23 at 100K, and the low excess noise factor close to unity (F ~ 1-1.25) are indicative of a single carrier multiplication process, which is electron impact ionization. The dark current is mainly due to a diffusion curr...

Hitherto, two families of multielement infrared (IR) detectors are used for principal military and civilian infrared applications; one is used for scanning systems (first generation) and the other is used for staring systems (second generation). Third generation systems are being developed nowadays. In the common understanding, third generation IR systems provide enhanced capabilities like larg...

Face recognition is an area of computer vision that has attracted a lot of interest from the research community. A growing demand for robust face recognition software in security applications has driven the development of interesting approaches in this field. A large quantity of research in face recognition deals with visible face images. In the visible spectrum the illumination and face expres...

Minority Carrier Lifetime in Beryllium-Doped InAs/InAsSb Strained Layer Superlattices Report Title Minority carrier lifetimes in undoped and Beryllium-doped Type-2 Ga-free, InAs/InAsSb strained layer superlattices (SLS) with energy gaps as low as 0.165 eV were determined from photoluminescence kinetics. The minority carrier lifetime of 450 ns at 77 K in the undoped SLS confirms a high material ...

Abstract: This paper presents a nonlinear Bayesian regression algorithm for detecting and estimating gas plume content from hyper-spectral data. Remote sensing data, by its very nature, is collected under less controlled conditions than laboratory data. As a result, the physics-based model that is used to describe the relationship between the observed remotesensing spectra, and the terrestrial ...