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Shortwave infrared (SWIR) light is generally defined as light in the wavelength range of 1.0-2.5 µm. Unlike mid-wave infrared (MWIR) and long-wave infrared (LWIR), which is emitted by the object itself. SWIR resembles visible light in that photons are reflected or absorbed by an object, creating the strong contrast needed for high-resolution imaging. Starlight and background radiation (nightglow) are natural sources of SWIR and provide excellent illumination for outdoor night imaging.
SWIR imaging allows the crew of an armoured vehicle to look through haze, fog, sandstorms, snow and glass, providing them with optimal visibility. Typical applications for this SWIR camera technology can also be found in police surveillance, border control and security. In fire departments, for example, it can help crews detect objects or people even in very heavy smoke.
Smoke, snow, fog, and certain materials such as glass and silicon are transparent, when imaging in SWIR. That means the atmospheric influence of fog and smoke disappears in the shortwave infrared (SWIR) spectrum. Although capturing images in the SWIR lacks the color content of the visible region, SWIR images -which are formed by light reflected from observed objects- can be interpreted as easily and directly as images in the visible region. A wide range of applications that would be difficult or impossible to perform with visible light are now possible with SWIR.
24-hour all-weather surveillance is a necessity for many military and emergency services. While thermal imaging can detect temperature differences, a SWIR camera can actually identify the object. Thermal imaging does not offer the resolution and range of imaging that is possible with a SWIR sensor. In a military conflict situation, it is critical to determine whether a threatening vehicle is a civilian truck or a military tank. SWIR can assist in this detection.
CMOS sensors are excellent devices to meet military needs, but these sensors are usually daylight sensors. A single SWIR camera can be used for both day and night imaging and can function throughout the duration of typical long day and night missions.
Nedinsco’s SWIR cameras are seamlessly integrated with other imaging technologies, such as visible and long-wave infrared (LWIR) cameras, in multi-spectral systems to deliver unparalleled imaging performance. This integration allows the capture of detailed images across diverse wavelengths, offering unique advantages such as seeing through smoke, fog, or other obscurants. By fusing SWIR data with visible or thermal imaging, operators gain a comprehensive and accurate view of the operational environment. Fusion modes highlight critical details, enabling better target identification and situational awareness in real time.
Learn more about how Nedinsco integrates SWIR into advanced systems or contact us to discuss your application needs.
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