Characterization of ship plumes is very challenging due to the great variety of ships, fuel, and fuel grades, as well as the extent of a gas plume. In this work, imaging of ship plumes from an operating ferry boat was carried out using standoff midwave (3-5 m) infrared hyperspectral imaging. Quantitative chemical imaging of combustion gases was achieved by fitting a radiative transfer model. Combustion efficiency maps and mass flow rates are presented for carbon monoxide (CO) and carbon dioxide (CO2). The results illustrate how valuable information about the combustion process of a ship engine can be successfully obtained using passive hyperspectral remote sensing imaging.
In order to illustrate the benefits of thermal infrared hyperspectral imaging (HSI) for mineral mapping, an airborne survey was carried out over an open-pit mine in the Thetford Mines (Qc, Canada) area. The results show how high spectral resolution data facilitates temperature emissivity separation (TES) and atmospheric correction in order to retrieve a thermodynamic temperature map of the area and its associated spectral emissivity datacube. Mineral mapping of various minerals such as lizardite, serpentinite, and quartz was achieved through linear unmixing of the emissivity data using reference emissivity curves found in spectral libraries. The results illustrate the potential of TIR HSI for airborne mapping of silicate minerals.
The discovery of the optical frequency comb and the breakthrough work of Hänsch and Hall in refining the frequency comb technique have revolutionized the field of scientific metrology. In this application note, we will look more closely at how the so-called “microcombs” are generated and what the role of external cavity diode lasers (ECDLs) is in the microcomb generation process. We will briefly discuss how the microcomb is evolving into a compact, versatile tool with increasing application, for example, in the field of molecular spectroscopy. Although still maturing, the field of microcombs has the potential to transform various other disciplines, leading to compact comb generation platforms with numerous applications.
IRCameras provides the most technologically advanced infrared imaging systems available for scientific, industrial and military applications. In addition to our extensive line-up of standard commercial cameras and IDCAs, we offer custom design and build services to meet unique optical, packaging and space-constrained requirements
IRCameras is a subsidiary of Santa Barbara Infrared, a long-time leader in the design and manufacture of electro-optical (E-O) test instrumentation. SBIR, in turn, is part of HEICO Corporation, a technology-based aerospace company that’s been engaged in niche market segments within the aerospace, aviation and electronics industries for more than 40 years. Together we are uniquely positioned to advance development of thermal imaging technologies, and to commercialize these technologies for a wide range of applications including:
We offer a range of purchase, rental and lease options, and a full line of accessories including software, data acquisition systems and optics. Our goal is to make your infrared imaging program a complete success. We welcome the opportunity to learn more about your requirements, and to explore how we might be able to assist in creating and supporting the optimal program to meet your particular infrared imaging requirements.
PIXELTEQ provides OEM spectral sensing and imaging products, patterned optical filters and custom electro-optical devices for a variety of aerospace, biomedical, industrial, scientific and security applications. At the heart of each multispectral device is an array of pixel-level spectral filters purpose-built for applications.
UTC Aerospace Systems (Sensors Unlimited Products), is the world’s leading manufacturer of indium gallium arsenide (InGaAs)-based imaging products. As renowned experts in shortwave infrared (SWIR) imaging, Sensors Unlimited, Inc. introduced the world to the concept of imaging in the shortwave IR spectrum with simple, compact, and uncooled cameras.
Opto Diode Corporation is a world supplier of reliable, high quality infrared (IR) LEDs and custom LEDs in the visible range. Since 1981, we have produced standard TO-packaging and custom housing LEDs in our U. S. facility in Southern California, maintaining the highest standards with our in-process quality control and testing systems...
First Sensor AG (Formerly Silicon Sensor) has over 20 years of experience in the development and manufacture of individual sensor solutions offering highest levels of precision and reliability.
Xenics is a well established and rapidly growing high-tech company about to enter exciting new fields of IR products and applications, serving the markets with excellent products and a strong technology background.
Photomultiplier Tubes|Arc Lamp|Photo Multiplier|Spectroscopy Systems
Voxtel develops truly disruptive technologies that enable our customers to design, build, and deploy next-generation optoelectronic systems. We maintain two divisions: Voxtel Optoelectronics, headquarted in Beaverton, Oregon, and Voxtel Nanophotonics in Eugene, Oregon.
Excelitas Technologies is a global technology leader focused on delivering innovative, customized optoelectronics and advanced electronic systems to a global customer base of leading OEMs seeking high-performance, market-driven technologies.
Gentec Electro-Optics, Inc. will show its new Pronto Handheld Laser Power Meter, capable of measurements up to 250 W, for the first time at the Laser World of Photonics show in Munich in June, and the Pronto-250 and Pronto-250-CO2 will be available for delivery in July 2015.
Researchers say the chamber will help develop and validate cameras’ and sensors’ abilities to penetrate fog, knowledge that could lead to improved surveillance at sites. The chamber also could be used to answer fundamental optics questions, which in time could lead to improved security camera lenses and medical imaging equipment, safer aircraft landings and better vision for drivers in fog.
LIGHT SENSORS & DETECTORS
A light sensor is a device senses or detects light. Various available kinds of light sensors and detectors function in different ways to give required results.
Active pixel sensors which are image sensors comprises of an integrated circuit with a number of pixel sensors. Each individual pixel has a light sensor as well as an active amplifier.
Charge-coupled devices (CCD)
These are applied in recording of images in astronomy, digital cinematography and digital photography.
A silver halide molecule is split into an atom of metallic silver and a halogen atom; the photographic developer causes adjacent molecules to split similarly. An example is a photographic plate.
They are sensitive enough to measure and determine the energy of single x-ray, visible and infrared photons.
They are normally quantum devices where individual photons produces a discrete effect when exposed to light. This makes Optical detectors to behave like thermometers by responding solely to the heating effect of the incoming radiation.
Photo resistors or Light Dependent Resistors (LDR)
They change resistance according to light intensity. The light then can be measured or determined by measuring the resistance.
Photovoltaic cells or solar cells
When Illuminated they produce a voltage and supply an electric current. Which means the level of illumination is directly dependent on the amount of light being supplied.
They contain a photocathode that emits electrons when illuminated. A chain of diodes then can be used to amplify the electrons.
These contain a photo cathode which when illuminated emit electrons making the tube to conduct an electric current that is proportional to the light intensity.
Has two photodiode arrays which convert light into current; one photodiode array responds to ambient light and the other responds only to infrared light; when joined with an infrared LED, this second LED array can operate as a proximity sensor.
Ambient Light Sensing Application
Ambient light sensors are incorporated in various laptops as well as cell phones to detect the lighting in the surrounding environment and appropriately adjust the backlight of the screen.