Electrically controllable liquid-crystal (LC) microlens arrays have been fabricated using the process of anisotropic phase separation of the LC from its solution in a ultraviolet curable prepolymer. The focal length of nematic LC-based microlens arrays can be changed in milliseconds with an applied electric field. The ferroelectric LC microlens array exhibits the memory effect and modulates the transmitted light within a few microseconds,i.e., ~ 1000 times faster than the nematic LC-based microlens. Having no internal substructures to scatter light, these devices offer high efficiency and high light throughput that is different from polymer-dispersed devices.
Journal of Lightwave Technology
Kim, Jae-Hoon; Kumar, Satyendra (2005). Fabrication of Electrically Controllable Microlens Array Using Liquid Crystals. Journal of Lightwave Technology 23(2) 628-632. doi: 10.1109/JLT.2004.841254. Retrieved from https://oaks.kent.edu/article/fabrication-electrically-controllable-microlens-array-using-liquid-crystals