HyperspectralCamera
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Researchers turn a DSLR into hyperspectral camera using PVC and duct tape, MacGyver green with envy
Hyperspectral imaging is a method that captures a far greater amount of the electromagnetic spectrum than a regular photograph. This makes it ideal for a variety of uses, from night vision to identifying mineral deposits from afar, but the problem is that hyperspectral sensors don't come cheap. However, some intrepid imaging scientists have come up with a way to turn your DSLR into a hyperspectral camera using stock SLR glass, a gel diffraction filter, PVC pipe, duct tape, some serious ingenuity and plenty of elbow grease. Thusly did they build a (relatively) cheap-as-chips imaging spectrometer that can deliver spectral resolution equal to that of commercial solutions at a far lower cost. The result of their labor is a computed tomography image spectrometer (CTIS), which takes hyperspectral images by splitting light into spectral bands with a diffuser and recording them using a Canon EOS 5D Mark I in HDR mode. As constructed, the prototype takes a spectral resolution of up to 4.89nm in a 120 x 120 pixel area, though at a longer exposure time than dedicated devices. Having proven their concept, the plan is to build another lens extension using custom tubes and lenses that'll both reduce weight and increase the aperture to shorten the exposure time -- all for less than a grand. You can see both the camera's construction and some sample images in the gallery below, plus you can dig deep into the nitty gritty behind this bit of imaging black magic at the source link. %Gallery-141944%
Hyperspectral camera captures 1,000 colors, identifies contaminants
Putting our dinky point-and-shoots to shame, researchers at Tel Aviv University have created a hyperspectral HSR camera that detects more than 1,000 colors -- something that can be used to pinpoint contaminants or hazards in the environment. According to lead scientist Professor Ben-Dor, different elements produce different colors, helping researchers identify hazards or contaminated soil without being forced to bring samples back to the lab. It works as such: the sensor analyzes sunlight as it bounces off an object, which it then interprets. The shooter is so sensitive that it can read samples anywhere from 0.4 inches to 500 miles away, meaning it could operate from weather balloons or even one of these -- rendering Joseph and his amazing technicolor dreamcoat most jealous. Check out the full PR after the break.
