Mur Urban, Ravnik Miha, Seč David
Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000, Ljubljana, Slovenia.
J. Stefan Institute, Jamova 39, Ljubljana, Slovenia.
Sci Rep. 2022 Jan 10;12(1):352. doi: 10.1038/s41598-021-04164-0.
Shaping and steering of light beams is essential in many modern applications, ranging from optical tweezers, camera lenses, vision correction to 3D displays. However, current realisations require increasingly greater tunability and aim for lesser specificity for use in diverse applications. Here, we demonstrate tunable light beam control based on multi-layer liquid-crystal cells and external electric field, capable of extended beam shifting, steering, and expanding, using a combination of theory and full numerical modelling, both for liquid crystal orientations and the transmitted light. Specifically, by exploiting three different function-specific and tunable birefringent nematic layers, we show an effective liquid-crystal beam control device, capable of precise control of outgoing light propagation, with possible application in projectors or automotive headlamps.
光束的整形和操控在许多现代应用中至关重要，这些应用涵盖从光镊、相机镜头、视力矫正到3D显示器等领域。然而，目前的实现方式需要越来越高的可调性，并且旨在降低在各种应用中使用时的特异性。在此，我们展示了基于多层液晶盒和外部电场的可调光束控制，通过结合理论和全数值模拟，对液晶取向和透射光进行研究，实现了光束的扩展位移、转向和扩展。具体而言，通过利用三种不同功能特定且可调的双折射向列相层，我们展示了一种有效的液晶光束控制装置，能够精确控制出射光的传播，有望应用于投影仪或汽车前照灯。
