Researchers harness liquid crystal structures to design simple, yet versatile bifocal lenses
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Researchers have developed a new type of bifocal lens that offers a simple way to achieve two foci (or spots) with intensities that can be adjusted by applying external voltage. The lenses, which use two layers of liquid crystal structures, could be useful for various applications such as optical interconnections, biological imaging, augmented/virtual reality devices and optical computing.
"Most liquid-crystal-based devices are made from single-layer structures, but this limits light field modulation to a confined area," said research team leader Fan Fan from Hunan University in China.
"We used bilayer structures composed of a liquid crystal cell and a liquid crystal polymer to realize more complex and functional modulation of incident light."
