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University of Utah researchers have developed a new kind of flat optical lens that is much thinner and lighter than conventional camera lenses. While conventional lenses for smartphone cameras are a couple of millimeters thick, the ultrathin lens is only a few micrometers thick. The new lens can also be used for thermal imaging.
The ultrathin lens has many microstructures, each bending the light at the sensor. The Utah researchers designed thin multilevel diffractive lenses (MDLs) to correct for image aberrations, including chromatic aberrations in the long-wave infrared (LWIR) band, thereby reducing the weight of the lenses. With simulations corroborated by experiments, they demonstrated that broadband LWIR imaging is possible with…READ MORE