Bionic Compound Eye Based on a Flexible Fresnel Lens Array
Biological compound eyes have excellent optical properties,including large field of view,small size,no aberrations,and sensitivity to moving objects.Sensitivity to moving objects is crucial for flying insects that chase small,fast-moving targets.Inspired by the sensitivity of compound eyes possessed by insects to moving objects,we prepared a single-layer bionic compound eye with five ommatidia,each consisting of a Fresnel lens.Using femtosecond laser two-photon polymerization processing technology and soft lithography technology,a flexible bionic compound eye with high accuracy and repeatability was prepared.Experimental results show that the prepared bionic compound eye could obtain high-quality images and be used to track moving targets.