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 ...

One important LC parameters are their dielectric constants that determines the threshold voltage of the LC. This parameter is very dependent on frequency and temperature and for this reason, a ...

Lenses made with liquid crystals could lead to eyeglasses that can easily switch between correcting near- and far-sightedness. Instead of fashioning lenses just from glass, which must be made convex ...

Researchers developed a bifocal lens based on two layers of liquid crystal (LC) structures. The intensities for the two focal lengths can be easily adjusted by applying external voltage. WASHINGTON — ...