Bioinspired lenses from cats' eyes

• 作者: Shuwen Xue Chuanjie Hu Miao Zhang Huanyang Chen
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Optical Design and Fabrication
• 页码范围: 127-132
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL202220.012202

摘要

It is well known that cats have fascinating eyes with various colors,such as green,blue,and brown.In addition,they possess strong night vision ability,which can distinguish things clearly even in a poor light environment.These drive us to reveal the secrets behind them.In fact,cats' eyes can be considered as special lenses[which we would like to mimic by using a Luneburg lens].We make an analysis of the role of photonic crystals behind the lens and demonstrate that the integration of photonic crystals into Luneburg lens can be regarded as a retroreflector and greatly improve the light focusing intensity of the lens in a broad band of frequencies.This wonderful bioinspired phenomenon is expected to design more interesting and serviceable devices by combining photonic crystals with transformation optics.