Non-mechanical beam steerers with lightweight, compact, high-efficiency, high-precision, and/or large-angle are pivotal for light detection and ranging (LiDAR) of autonomous vehicles, eye-tracking for near-eye displays, microscopy, optical tweezers, and high-precision three-dimensional (3D) printing. However, even the most matured optical phased array can only provide quasi-continuous, efficient beam steering within a small angle range. A telescope module with an angle magnification function can be coupled to enlarge the steering range or precision. But obtaining a compact, low-cost, lightweight, high-quality telescope module with conventional optics remains challenging. Patterned liquid crystal-based planar optical elements offer great design freedom for manipulating the phase profile of light in 2D space. Owing to the advantages of high efficiency, thinness, low cost, easy processing, flexibility, and response to environmental stimuli, a plethora of high-quality optical devices have been demonstrated. Here, a miniature planar telescope mediated by liquid crystal polymers is proposed to offer angle magnification independent of incident spatial location. It consists of two cascaded liquid crystal planar optical elements, each performing a predefined mathematical transformation. By this concept, planar optical elements are fabricated using a new exposure method and assembled into planar telescopes with different magnification factors. Within the incident field range, over 84.6% optical efficiency is achieved with small wavefront distortion. Such a miniature planar telescope shows the potential of cascaded liquid crystal planar optical elements for realizing functionalities that cannot be fulfilled by single optical elements, and enables lightweight, low loss, passive optical transmitters for widespread applications.

具有轻巧、紧凑、高效、高精度和/或大角度的非机械光束转向器对于自动驾驶汽车的光检测和测距 (LiDAR)、近眼显示器的眼动追踪、显微镜、光学镊子和高精度三维 (3D) 打印。然而，即使是最成熟的光学相控阵也只能在小角度范围内提供准连续、高效的光束控制。可以耦合具有角度放大功能的望远镜模块，以扩大转向范围或精度。但是，使用传统光学器件获得紧凑、低成本、轻便、高质量的望远镜模块仍然具有挑战性。基于图案化液晶的平面光学元件为在 2D 空间中操纵光的相位分布提供了极大的设计自由度。由于具有高效率、薄型、低成本、易加工、灵活性和对环境刺激的响应等优点，已经证明了大量高质量的光学器件。在这里，提出了一种由液晶聚合物介导的微型平面望远镜，以提供独立于入射空间位置的角度放大率。它由两个级联的液晶平面光学元件组成，每个元件执行预定义的数学变换。根据这个概念，平面光学元件使用新的曝光方法制造，并组装成具有不同放大倍数的平面望远镜。在入射场范围内，实现了超过 84.6% 的光学效率，并且波前畸变很小。