Abstract This article presents an overview of the current status and future prospects integrated nonlinear photonics in long-wave infrared (LWIR) spectrum, spanning 6 to 14 μm. range is well-suited for applications such as chemical identification, environmental monitoring, surveillance, search rescue, night vision. Nevertheless, advancement a mature, low-loss chip-level platform LWIR remains it...

Although some authors suggest to use Long-Wave Infrared (LWIR) sensors to evaluate brain functioning, the link between emissions of LWIR and mental effort is not established. The goal of this pilot study was to determine whether frontal LWIR emissions vary during execution of neuropsychological tasks known to differentially activate the pre-frontal cortex (simple color presentations, induction ...

Physical Sciences Inc. (PSI) is developing a longwave infrared (LWIR) compressive sensing hyperspectral imager (CS HSI) based on a single pixel architecture for standoff vapor phase plume detection. The sensor employs novel use of a high throughput stationary interferometer and a digital micromirror device (DMD) converted for LWIR operation in place of the traditional cooled LWIR focal plane ar...

We report the first computational super-resolved, multi-camera integral imaging at long-wave infrared (LWIR) wavelengths. This technique has been made possible by the drastic price reduction provided by low-resolution LWIR uncooled detector technology. An array of FLIR Lepton cameras, each with a resolution of 80x60 pixels is synchronized and computational super-resolution and integral-imaging ...

We present a novel reflective quarter-wave plate comprised of subwavelength meanderline elements. The device is operational over the long-wave infrared (LWIR) spectrum, with significant spectral and angular bandwidths. Power reflection is approximately 70% over the majority of the LWIR. Efficient conversion from a 45° linear polarization state into circular polarization is demonstrated from fin...

Long wave infrared (LWIR) imaging is an imaging modality currently gaining increasing attention. Facial images acquired with LWIR sensors can be used for illumination invariant person recognition and the contactless extraction of vital signs such as respiratory rate. In order to work properly, these applications require a precise detection of faces and regions of interest such as eyes or nose. ...

Extended coupled-wave analysis of optical parametric chirped-pulse amplification (OPCPA) reveals regimes whereby high-peak-power few-cycle pulses can be generated in the long-wavelength infrared (LWIR) spectral range. Broadband OPCPA in suitable nonlinear crystals pumped at around 2 μm and seeded either through the signal or the idler input is shown to enable the generation of high-power field ...

We describe sensor-based and signal-processing-based techniques for improving the detection of buried land mines in thermal infrared imagery. Results of experimental studies using MWIR (2.2-4.6 μm) and LWIR (8-12 μm) imaging systems are reported. Thermal clutter due to surface reßected sunlight and skylight are investigated and shown to be the dominant clutter component for both MWIR and LWIR i...

We report on the development and application of multispectral infrared imaging technology to problems of interest to the U. S. military. For tactical applications, we show the application of dual-band infrared focal plane arrays to reconnaissance, surveillance, and target acquisition. We describe the development of a new dualband LWIR/LWIR focal plane array for detection of the disturbed soil f...

Long-wave infrared (LWIR) hyperspectral image (HSI) data presents an interesting challenge for automatic target detection algorithms. LWIR HSI data is useful for both day and night operations, but weak signatures like disturbed soil can be problematic for standard matchedfilter techniques (Bowman, et al. 1998). In this paper, we augment the standard matched-filter techniques with physics-based ...