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infrared Features
From IR to THz, Space Telescopes Get Detector Array Upgrades
August 25 marked the Spitzer Space Telescope’s “sweet 16.” Launched in 2003 with a planned primary mission of 2.5 to 5 years, the infrared observatory — the last of NASA’s Great Observatories to take flight — far outlasted its initial mandate, depleting its store of liquid helium coolant and transitioning into a “warm mission” in 2009. In their recent book on Spitzer, More Things in the Heavens: How Infrared Astronomy Is Expanding Our View of the...
Photonics Spectra, November 2019
Terahertz 3D Spectroscopy Boosts Imaging Applications
Terahertz imaging is a promising technique for noncontact, noninvasive, nonionizing 3D spectroscopy. Terahertz rays, located between microwave and IR on the electromagnetic spectrum from approximately 0.06 THz (60 GHz) to 10 THz, are capable of...
Photonics.com, June 2018
Germanium Alternative Gaining Momentum for IR Optics
When it comes to designing IR imaging systems, manufacturers have traditionally worked with crystalline materials such as germanium. To make compact, lightweight systems, fabricators are driven to use aspheric surfaces, which has meant diamond...
Photonics Spectra, April 2018
DCS 2017 Brings Defense, Environment Into Focus
Changes in the nature of warfare in today’s high-tech world demand the most advanced tools for soldiers and others in the defense and security sectors. Environmental and health care segments are evolving, too, as an onset of innovative...
Photonics Spectra, April 2017
Consumers and Cost Are Driving Infrared Imagers into New Markets
Once the exclusive domain of the military, infrared imagers are now taking commercial applications by storm, thanks to lower prices and better technology. In fact, it seems the only limit to this flourishing technology is our imagination....
Photonics Spectra, April 2015
SWIR Applications and Challenges: A Primer
Infrared imaging opens endless possibilities for industrial, scientific and security image-processing applications. But short-wave infrared cameras must overcome the limitations of InGaAs sensor technology to provide high-quality images....
Photonics.com, September 2014
Dual-Band Monitoring Keeps Trains Running in Winter
Keeping critical parts of the railroad infrastructure free of snow, sleet, hail and ice – and even detecting unauthorized persons walking the rails – is essential for a safe and uninterrupted transportation service. Dual-band monitoring...
Photonics Spectra, September 2014
Better Lasers, Better Computing
To take communications to the next level, laser technologies must improve in terms of cost, efficiency and robustness. Fortunately, those improvements are in the works. Whether traveling through free space or over a fiber, lasers power data delivery...
Photonics Spectra, February 2014
Dual- and Triple-Band AR Coatings Enhance IR Systems
Advanced dual-band coatings improve camera performance in the 3- to 5-µm and 8- to 12-µm spectral regions. Dual-band infrared camera systems allow the 3- to 5-µm and 8- to 12-µm spectral regions to be viewed and compared....
Photonics Spectra, November 2013
Transparent Ceramics Find Wide Use in Optics
Polycrystalline ceramics with the cubic spinel structure enable multiple defense applications, including night-vision goggles and IR optics for military systems such as domes, lenses, reconnaissance and sensor windows – they also have...
Photonics Spectra, August 2013
With Infrared, Military Owns More Than the Night
Short-, long- and mid-wave IR imaging helps defense agencies find targets and even determine intent. At the US Army’s Night Vision and Electronic Sensors Directorate, the goal is to see – day or night – through smoke, fog, dust or...
Photonics Spectra, April 2013
IR Imaging Optics Meet Varied Needs
Infrared camera technology spans a wide range of the electromagnetic spectrum, with results that vary with the waveband. Although there is some overlap of applications between the different infrared subbands and associated sensor technologies, it is...
Photonics Spectra, August 2012
Choosing a Material for Use in the Infrared
Creators of infrared systems often encounter difficulty when trying to select the proper materials for their optical designs. Part of the challenge is gathering information on the physical properties of IR materials. The other part is understanding...
Photonics Spectra, November 2010
Near-Infrared Bandpass Filters for Astronomy
Near-infrared filters operate within a wavelength range of 800 to 5000 nm and typically consist of multiple thin-film interference layers of silicon/ silicon compounds deposited on a suitable optical substrate. They can be manufactured in narrow-...
Photonics.com, August 2010
Putting Imaging in the Picture
It is now more than 180 years since the first image was captured by Joseph Nicéphore Niépce from an upstairs window on his estate in France using pewter plates and a camera obscura...
Photonics.com, February 2010
Calibrating the Thermal Camera
Thermal imaging, once the domain of the defense sector, is finding applications in a number of commercial and medical fields. As more manufacturers join the thermal camera business, the need to test these devices to recognized standards is becoming...
Photonics Spectra, December 2009
For Lidar, Many Happy Returns
For light detection and ranging (lidar) scanners, the returns are in – and they’re good. Innovations have made lidar scanners, which emit laser pulses and capture the returning light to determine distance to an object or characteristics of air,...
Photonics Spectra, November 2009
Infrared Imaging: The Short and the Long of It
Where vision ends, infrared begins. Stretching from 0.7 to 1000 μm, the infrared spectrum covers a lot of ground, as do the imaging applications that make use of this part of the spectrum. These applications include biological studies,...
Photonics Spectra, April 2007
All IR Cameras Are Not Created Equal
As media saturation spreads in the Western world, it is almost impossible to go anywhere without seeing some kind of a camera. This increase in camera use is highly evident in the infrared and night-vision market. However, it is important to note...
Photonics Spectra, February 2004
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April 2024
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