为了满足轻量化、微型化和大视场的要求,提出了一种焦距递减的多聚焦人工复眼,子眼以同心圆排布,同一同心圆上的子眼具有相同的焦距,从内到外焦距递减.采用光刻胶回流法制作该曲面人工复眼,通过光刻胶的用量与掩膜的设计将每个子眼的焦距控制在一个特定的范围,从而使所有的子眼能在同一平面聚焦.为了防止微透镜图形的破坏,采用了负压成型技术,制作了聚二甲基硅氧烷腔室用以在注胶时排除异物与空气.透镜材料Norland81具有良好的光学性能,且曝光时间比Norland61要快3至5倍.利用ZEMAX建立复眼模型并进行了模拟仿真,光线追迹结果表明该模型即使在大视场下也能获得清晰像点.

In order to meet the demand of lightweight,miniaturization,large fields of view,a multi-focusing artificial-compound-eye with a gradually decreasing focal length was proposed. The ommatidia were arranged in the form of concentric circles,and each one owned the same focal length in the same circle. The artificial-compound-eye was fabricated by the photoresist reflow method. Each ommatidium had a specific focal length within a small interval through the calculation of dosage of photoresist,so that all the ommatidia could focus on the same plane. As for the manufacturing process,negative pressure was applied to solve microlens deformation problems,and Polydimethylsiloxane coelomic compartment was used for injecting optical adhesives without any impurities. In addition,Norland81 as the moulding material has similar qualities to the previous one,yet it can be cured 3 to 5 times faster. The simulation model was established by ZEMAX,and the result of ray-tracing shown that a clear image point could be obtained even under large field of view.