摘要
受限于制造技术,大多数仿生复眼的传感器为平面结构,与生物复眼的曲面结构存在差异,限制了其成像质量和视场扩展。本文设计制造了一个模拟生物复眼结构的大视场仿生复眼,将16块8.5mm CCD传感器组成2×8的曲面阵列,并设计制造了配套的单层结构的曲面2×8透镜阵列,各透镜与传感器成一一垂直对应关系,贴合了生物复眼的结构特征,消除了传统复眼的离轴像差。通过引入光学自由曲面和非球面,保证了单层结构透镜阵列的成像质量,单层透镜阵列降低了系统的制造及装配难度。系统实现了180°×75°视场范围内无盲区的图像采集。实验结果表明,与传统鱼眼镜头相比,本文系统畸变更小,分辨率更高。
Due to the limitation of traditional manufacturing technology,most bionic compound eyes employ planar image sensor,which are different from the curved structure of insect compound eyes.It limits the optical performance and the field of view(FOV).In this paper,a curved 2 X 8 single layered compound eye system using optical freeform surface is designed and manufactured,which is close to the structure of insect compound eye.We assemble 161/3 inch CAD sensors as a curved 2×8 image sensor array.And a curved 2×8 single layered micro lens array is designed and manufactured.All the lenses are perpendicular to the corresponding CCD sensor,which can eliminate the off-axis aberration.The applica-tion of optical ffeeform surface and aspheric surface guarantees the imaging quality of the single layered lens.And the single layered lens array reduces the difficulty of manufacturing and assembling of com-pound eye system.The system achieves image capture in the FOV of 180°×75°with no gap.Compared with fisheye lens,this system has lower distortion and higher resolution.The experiment results verify the availability of this system.
作者
庞阔
宋乐
房丰洲
PANG Kuo;SONG Le;FAN G Feng-zhou(State Key Laboratory of Precision Measuring Technology&Instruments,Engineering Center of Tianjin Micronano Technology,Tianjin University,Tianjin 300072,China)
出处
《光电子.激光》
EI
CAS
CSCD
北大核心
2018年第1期8-13,共6页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(61635008,51320105009,91423101)
国家重点基础研发(2016YFB1102200)
111引智计划(B07014)
天津市自然科学基金(17JCYBJC19000)资助项目
关键词
复眼
大视场
自由曲面
曲面透镜阵列
compound eye
large field of view
optical freeform surface
curved lens array
