Researchers harness liquid crystal structures to design simple, yet versatile bifocal lenses

https://phys.org/news/2024-10-harness-liquid-crystal-simple-versatile.html

"2 foci, intensities adjustable (not limited to confined area) applying external voltage... lenses use 2 liquid crystal cell/ polymer layers... polarization imaging enhancing image contrast... edge imaging highlighting object outlines making easier to see fine details/ spot shapes...  inspired by multi-functional holographic devices... split left-handed circularly polarized light into 2 focused light beams: left-handed/ right-handed circular polarization... optical interconnections, biological imaging, AR, VR, optical computing"