高数值孔径曲面复眼成像体系研究

Compound eye imaging systems have attracted great attentions for their small volume, large field of view (FOV) and the capability to track the fast moving objects. As a result, compound eyes have been widely used in various areas including radar systems, micro aerial vehicles, precise terminal guided weapons, night vision systems, micro compound eye cameras, mobile robots and so on. However there are still some technology bottle necks yet to be overcome to make compound eye system more realisable with its advantages are fully taken. On one hand, most currently applied compound eye systems consist of single layer planar compound eyes or multilayer assembled planar compound eyes, but not the real curved compound eyes so that they do not have a field of view as large as that of the real biological compound eye systems. Moreover, most artificial compound eye systems suffer from the complicated stucture so that they are not practical to be commerciable. On the other hand, the real biological compound eyes can not be used in the area of high resolution imaging due to their small numerical aperture(about 0.3). In view of above issues, we propose to develop the curved compound eye imaging system with high numerical aperture, which will inherit the advantages of large FOV as well as small volume of biological compound eye system. In addition, the newly developed compound eye system can be applied in the high resoultion imaging system due to its high numerical aperture. We hope the newly developed compound eye system can be applied in areas needing large FOV and high resolution such as short-distance surveillance, micro-distance measurement, 3-D high definition display and so on.

复眼成像系统由于体积小、视场角大、对高速移动物体敏感等优点而备受研究者关注。关于复眼的研究成果已在雷达系统、微型飞行器、精确末制导武器等国防科技领域以及夜视、微型复眼相机、运动机器人等国民经济领域得到广泛应用。但是一方面，由于目前得到应用的复眼成像系统大多为单层或者多层平面复眼组合结构，而非真正的曲面复眼结构，因此存在视场角较小、结构较复杂等缺点，并未充分发挥出生物复眼的绝对优势；此外，由于真正的生物复眼的数值孔径通常较小（约0.3），因此并不能被应用于高分辨成像领域。针对以上问题，我们在前期良好的工作基础上，提出发展高数值孔径的曲面复眼成像系统，做到即能继承生物复眼视场角大和体积小的优点，又具有精细分辨物体的能力，使其能真正地应用于大视场高分辨成像领域如近距侦查、微距检测以及三维高清显示等应用领域。

复眼成像系统由于体积小、视场角大、对高速移动物体敏感等优点而备受研究者关注。关于复眼的研究成果已在雷达系统、微型飞行器、精确末制导武器等国防科技领域以及夜视、微型复眼相机、运动机器人等国民经济领域得到广泛应用。但是一方面，由于目前得到应用的复眼成像系统大多为单层或者多层平面复眼组合结构，而非真正的曲面复眼结构，因此存在视场角较小、结构较复杂等缺点，并未充分发挥出生物复眼的绝对优势；此外，由于真正的生物复眼的数值孔径通常较小（约0.3），因此并不能被应用于高分辨成像领域。.针对以上问题，本项目在前期良好的工作基础上，提出发展高数值孔径的曲面复眼成像系统，做到即能继承生物复眼视场角大和体积小的优点，又具有精细分辨物体的能力。本项目主要进行了曲面复眼光学转向系统设计，曲面复眼制作工艺研究，以及大视场曲面复眼成像系统集成与图像处理等研究工作。利用光刻热熔等方法制作出高数值孔径仿生复眼，设计出平面-曲面像面转换系统，完成了系统集成，进行图像提取，并提出逆成像算法进行图像重构，得到清晰的大视场图像。研究成果能真正地应用于大视场高分辨成像领域如近距侦查、微距检测以及三维高清显示等应用领域。