标题： 光学空间板对空间的高压缩实验演示 显示英文标题

标题： Experimental demonstration of high compression of space by optical spaceplates

摘要： 光学成像系统的物理尺寸是其使用中最大的限制之一，限制了从望远镜到手机摄像头等各种系统的性能和部署。 空间板是一种非局部光学器件，能够将自由空间传播压缩到更短的距离，为更紧凑的光学系统铺平了道路，甚至可能实现超薄平坦的相机。 在这里，我们展示了第一个工程化的光学空间板，并实验观察到了任何波长区域中迄今为止展示的最高空间压缩比，高达$\mathcal{R}=176\pm14$，这比任何之前的设备高出29倍。 我们的空间板是一个多层堆叠结构，这是一种成熟的商业制造技术，支持批量生产。 这些堆叠结构的灵活性使得可以自由定制空间板的带宽和角度范围，而之前由块状材料制成的光学实验空间板则无法做到这一点。 通过适当选择这两个参数，多层空间板在光探测和测距（LIDAR）技术、视网膜扫描仪、内窥镜和其他尺寸受限的光学设备中具有近期应用前景。 显示英文摘要

摘要： The physical size of optical imaging systems is one of the greatest constraints on their use, limiting the performance and deployment of a range of systems from telescopes to mobile phone cameras. Spaceplates are nonlocal optical devices that compress free-space propagation into a shorter distance, paving the way for more compact optical systems, potentially even thin flat cameras. Here, we demonstrate the first engineered optical spaceplate and experimentally observe the highest space compression ratios yet demonstrated in any wavelength region, up to $\mathcal{R}=176\pm14$, which is 29 times higher than any previous device. Our spaceplate is a multilayer stack, a well-established commercial fabrication technology that supports mass production. The versatility of these stacks allows for the freedom to customize the spaceplate's bandwidth and angular range, impossible with previous optical experimental spaceplates, which were made of bulk materials. With the appropriate choice of these two parameters, multilayer spaceplates have near-term applications in light detection and ranging (LIDAR) technologies, retinal scanners, endoscopes, and other size-constrained optical devices.