A liquid crystalline polymer microlens array with tunable focal intensity by the polarization control of a liquid crystal layer

Yoonseuk Choi, Hak-Rin Kim, Kwang-Ho Lee, Yong-Min Lee, Jae-Hoon Kim
2007 Applied Physics Letters  
We propose a focal intensity tunable microlens array by using a birefringent liquid crystalline polymer for lensing action. Due to the difference of effective refractive indices, it acts as a positive or negative microlens with respect to the polarization state. As we control the incident polarization by adding a liquid crystal layer, the focal intensity can be tuned by an applied voltage. Twisted nematic and bistable ferroelectric liquid crystal modes were applied to demonstrate the
more » ... of various driving features such as a continuously tunable focal intensity or fast switching with memory effect.
doi:10.1063/1.2813638 fatcat:lvetry4dwfb2lkelzxavupojka