Polymer Stabilized Paraboloid Liquid Crystal Microlenses with Integrated Pancharatnam–Berry Phase
Polymer Stabilized Paraboloid Liquid Crystal Microlenses with Integrated Pancharatnam–Berry Phase
复制标题
DOI：
10.1002/adom.202101510
复制
发表时间：
2021-11
影响因子：
9
通讯作者：
Kelum Perera;H. N. Padmini;E. Mann;A. Jákli
中科院分区：
文献类型：
--
作者：
Kelum Perera;H. N. Padmini;E. Mann;A. Jákli
与球面透镜相比，非球面透镜减少了像差，并提供了更清晰的图像和更大的光斑尺寸。本文证明了应用剪切流可以产生具有抛物面非球面轮廓的平凹液晶（LC）透镜阵列。当手性掺杂剂从0增加到6wt%时，具有0.2mm孔径的单个透镜的焦距从0.67减小到0.45mm。焦距对入射光的偏振状态也很敏感。通过将6wt%的反应性单体加入到LC中进行光聚合来稳定透镜。对流动诱导透镜的形成和透镜的光学性质进行了定性解释。潜在的可调谐性的透镜在各个领域和它们的使用作为抛物面反射器进行了讨论。
Aspheric lenses reduce aberration and provide sharper images with improved spot size compared to spherical lenses. This paper demonstrates that applying shear flow can produce plano‐concave liquid crystal (LC) lens arrays with paraboloid aspheric profiles. The focal length of individual lenses, with a 0.2 mm aperture, decreases from 0.67 to 0.45 mm as the chiral dopant increases from 0 to 6 wt%. The focal length is also sensitive to the polarization state of the incoming light. The lenses are stabilized by photopolymerizing with 6 wt% of reactive monomer added to the LC. A qualitative explanation for the flow‐induced lens formation and the optical properties of the lenses is provided. The potential tunability of the lenses in various fields and their use as paraboloid reflectors are discussed.