Scientists have developed a lens-free mid-infrared camera using a modern twist on pinhole imaging. The system uses nonlinear crystals to convert infrared light into visible, allowing standard sensors ...

The sun’s getting feisty. Our star is nearing (or even at) the peak in its magnetic cycle, which means lots of solar storms—such as the big one that lit up the skies with auroras in May—as well as ...

IR sensors rely on an emitter (IR LED) and a detector (photodiode or photoresistor) to measure infrared light and convert it ...