Imaging from the visible to the longwave infrared wavelengths via an inverse-designed flat lens
Imaging from the visible to the longwave infrared wavelengths via an inverse-designed flat lens
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DOI：
10.1364/oe.423764
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发表时间：
2021-06-21
期刊：
影响因子：
3.8
通讯作者：
Menon, Rajesh
中科院分区：
文献类型：
--
作者：
Meem, Monjurul;Majumder, Apratim;Menon, Rajesh
人们普遍认为，校正成像中的色差需要多个光学元件。在此，我们表明通过允许像平面中的相位为自由参数，有可能使用单个衍射表面（即平面透镜）在从可见光（Vis）到长波红外（LWIR）的极宽波段上校正焦距的色差变化。具体而言，我们设计、制作并表征了一种厚度为……的平面、多层衍射透镜（MDL）
It is generally assumed that correcting chromatic aberrations in imaging requires multiple optical elements. Here, we show that by allowing the phase in the image plane to be a free parameter, it is possible to correct chromatic variation of focal length over an extremely large bandwidth, from the visible (Vis) to the longwave infrared (LWIR) wavelengths using a single diffractive surface, i.e., a flat lens. Specifically, we designed, fabricated and characterized a flat, multi-level diffractive lens (MDL) with a thickness of