Infrared spectral (or chemical) imaging is emerging as an exciting new tool in forensic analysis. Here we present some of our work in the application of infrared spectral imaging to different types of trace evidence: automotive paint chips, bicomponent fibers and the detection of illicit substances in fingerprints. INTRODUCTION Fourier Transform Infrared (FTIR) spectral (or chemical) imaging is...

We describe the control and performance of a new near-infrared camera based on a Rockwell PICNIC array detector for interferometry observations at the Infrared-Optical Telescope Array (IOTA). The camera control uses a complex programmable logic device that allows fast and stable clocking of the PICNIC array and on-the-fly reconfiguration of the readout method. We measured a read noise as low as...

A facility for subnanosecond time-resolved ~pump-probe! infrared spectroscopy has been developed at the National Synchrotron Light Source of Brookhaven National Laboratory. A mode-locked Ti:sapphire laser produces 2 ps duration, tunable near-infrared pump pulses synchronized to probe pulses from a synchrotron storage ring. The facility is unique on account of the broadband infrared from the syn...

The infrared solar spectrum contains a wealth of physical data about our Sun, and is explored using modern detectors and technology with new ground-based solar telescopes. The scientific motivation behind exploring these wavelengths is presented, along with a brief look at the rich history of observations here. Several avenues of solar physics research exploiting and benefiting from observation...

Broadband photodetector having detection capability ranging from visible to near infrared can be useful as a common detector for both data and transport applications. The capability of using single detector for all application in optical communication as the receiver, not only makes the total system cost lower, but it also makes easier the system vendors to reduce the inventory. We proposed det...

This article presents the use of combination object detection method and feature detector in an infrared video on traffic infrastructure tunnels. The theme paper is validation vehicle its classification using streams. In addition, focuses a to distinguish between vehicles with electric combustion motors. suggests low-resolution thermal camera as inexpensive extension installed technologies. dev...

This document describes how to implement a passive infrared (PIR) motion detector using Freescale's low-cost RS08KA microcontroller family. The base function of this design is to switch on appliances, especially lighting, in response to movement. The main idea behind this solution is to replace the common analog motion detector with an ultra low-cost digital design, based on the MC9RS08KA1. The...

The instrumentation development of a near-infrared (near-IR) spectrophotometer based on an acoustooptic tunable filter (AOTF) and its application as a detector for flow injection analysis (FIA) are reported. In addition to being compact and all solid state, this AOTF-based instrument is very sensitive, has high resolution, and can be rapidly scanned. The latter advantage make it uniquely suited...

We report a prototype CO2 gas sensor based on a simple blackbody infrared source and a spectrally narrow quantum cascade detector (QCD). The detector absorption spectrum is centered at 2260 cm−1 (4.4 μm) and has a full width at half maximum of 200 cm−1 (25 meV). It covers strong absorption bands of two spectrally overlapping CO2 isotopomers, namely the P-branch of CO2 and the R-branch of CO2. A...

Infrared detector has a wide range of applications. To fabricate an IR detector with good sensitivity, an efficient IR absorber is needed. In this paper, we theoretically and experimentally investigated the absorption characteristics of Ti, multi-layer structured Ti-SiO2 and TiNx-SiNx nano films. The multi-layer structured TiNx-SiNx films with different nitrogen contents and Ti nano films with ...