” Dr. Lawrence Corp of NASA noted the value of Headwall’s new instrument as a key element of his research efforts: “Since Chlorophyll fluorescence signals are relatively weak, a small and light imaging sensor that can collect this data at very high resolution is a game-changer for us when it comes to learning more about our global ecosystems.”
IMAGERS ARE ABLE TO DETECT AND PROVIDE THE FOLLOWING INFORMATION:
Classification of crop type
Provide structure information about the health of the vegetation
Extent of infestation or stress damage
Potential yield and soil conditions
Mapping of soil characteristics
Compliance monitoring (farming practices)
Assessment of crop damage due to storms and drought
Headwall leads the spectral sensing industry with innovative diffractive optics designs. Each integrated spectral instrument and OEM spectral engine leverages Headwall's proprietary, aberration-corrected diffraction gratings to achieve unparalleled imaging performance. Benefits include temperature insensitivity for robustness, no moving parts for reliable performance, very high SNR, low stray light, and outstanding spectral and spatial resolution.
All-reflective designs manage light better than any other technique; exceedingly low stray light and excellent spatial and spectral resolution are hallmarks of this approach. From handheld spectrometers to satellite-based remote sensors, Headwall delivers integrated hyperspectral and Raman solutions built to exceed the most demanding scientific applications.
Hyperspectral scanners with fine spectral resolution provide useful data for the estimation of canopy nitrogen, chlorophyll content and various narrow-band vegetation indices. Due to the volume of collected data, in general, RGB cameras implement frame arrays, whereas hyperspectral scanners are most commonly based on a linear array that captures scenes while operating in a push-broom mode (i.e., the scene coverage is achieved through multiple exposures of the linear array during the platform’s motion along its trajectory)
Hyperspectral sensors of the ‘pushbroom’ type produced by Headwall require motion to occur. That is, either the sensor flies above the field of view, or the field of view moves beneath the sensor. For UAV applications, Headwall’s small and lightweight Micro-Hyperspec is the platform of choice. Available in the VNIR (380-1000nm), NIR (900-1700nm), and SWIR (950-2500nm) spectral ranges, the sensor is truly ‘SWaP-friendly.’
Spatial Bands-640 Spectral Bands-270 Frame Rate (maximum, Hz)350 Dispersion per Pixel (nm/pixel)2.2 FWHM Slit Image (nm)6 Lens-17mm standard (4.8mm, 8mm, 12mm, 35mm also available) Storage-480GB (approximately 130 minutes and 100fps) Interface-Gigabit Ethernet Size (exclusive of GPS)76.2mm x 76.2mm x 119.9mm Weight (without lens)< 0.52kg
Intelligence, Surveillance, and Reconnaissance (ISR) is a crucial application area for hyperspectral imaging, and Headwall is there with instruments to meet every challenge…from airborne to ground-based and handheld. Regardless of the method of deployment, hyperspectral sensing for ISR must exhibit these characteristics:
Wide field of view
Exceptional spatial and spectral resolution
Headwall meets all three by using the science of diffractive optics in every sensor it builds. Diffractive optics delivers precision, but it also means fewer moving parts. This helps optimize size, weight, and power (SWaP), which is particularly critical for airborne applications where payload restrictions exist. There are three main areas where Headwall’s sensors are commonly used for defense and security applications. The first is airborne, often involving high- and mid-altitude aircraft, where a wide field-of-view with outstanding spectral fidelity can deliver situational advantage. The second area is tactical, where sensors placed aboard small UAVs and UGVs can deliver instantaneous hyperspectral information as a means of achieving specific mission objectives. The key here is minimized sensor size and weight to meet payload restrictions. The third area is ground-based, where sensors placed aboard masts or vehicles can survey terrain for anything that matches the chemical or biological spectral signatures loaded into each instrument. Headwall’s innovative solutions, available in pan-and-tilt or point-and-stare configurations, help keep our valuable troops and assets safer than ever.
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