Research On Design And Processing Technology Of Bionic Artificial Compound Eye Structure With Micron Surface

Under the rapid development of high-tech fields such as robots,medical equipment,aerospace,guided weapons,optoelectronics,etc.Because the single-lens lens has been unable to meet the application requirements of multiple occasions such as multi-mode shooting,holographic shooting,and fast tracking shooting.The application of multi-lens integrated optical components has gradually become the development trend of the visual system.The bionic compound eye has the advantages of high sensitivity,compact structure and high resolution etc.,and is widely used in the precision vision fields such as micro-trackers,micro-air vehicles and medical images,and so on.However,the existing bionic compound eye structure has many problems such as low light energy transmittance,small field of view angle,missing or overlapping images,etc.,resulting in low imaging quality of the bionic compound eye,and its application field is limited.In order to solve the above-mentioned problems,this paper established a curved bionic compound eye model with high transmittance,large field angle,and accurate imaging,and carried out structural analysis and design,edge image quality optimization,micron-scale integrated processing,optical performance testing research work,etc.Firstly,through the bionic analysis of each component in insect compound eyes,a curved bionic compound eye structure coupled with microlens array layer and pinhole array layer is proposed in this paper.The theoretical field Angle of the bionic compound eye can reach 107.48°×97.97°.In this paper,ray tracing,light transmittance analysis and simulation imaging detection were performed on the designed compound eye structure.The results showed that: compared with the single-layer curved compound eye structure,the optical information crosstalk between adjacent ommatidias channels is obviously reduced;Compared with the planar bionic compound eye,the light energy transmission rate is higher;The bionic compound eye structure has a higher resolution,but the image quality of the ommatidias at the edges is poor.This is currently a common problem with curved bionic compound eyes,and it is also a problem to be solved in this paper.Secondly,in order to solve the problem of low ommatidia image quality at the edge of curved compound eyes,the light matrix of the bionic compound eye model was established by analyzing the light propagation,conversion and reception in the system of the ommatidia co-optical axis,and the reasons for the poor image quality of the edge were expounded.,An optimization method of gradually decreasing the length of the pinhole is proposed by analyzing the relative positional relationship between the end of the pinhole and the image plane.Through the simulation analysis of the structure before and after the optimization,the effectiveness of the optimized curved bionic compound eye structure in correcting the image distortion of the edge ommatidia is verified.Finally,in order to avoid errors in the process of installation and debugging of each component of the bionic compound eye,this paper uses femtosecond laser two-photon polymerization processing technology to realize the integration of the bionic compound eye at the micron level.The laser power is optimized by studying the effect of different laser power on the size and optical performance of the ommatidia.Scanning electron microscopy and white light interferometer are used to detect the processing structure,and the self-assembled structure image of bionic compound eye was obtained.The structure size is basically consistent with the theoretical design size,and the optical surface quality is high.In order to test the optical performance of the bionic compound eye structure designed and optimized in this paper,an imaging detection system was built independently,and the bionic compound eye before and after optimization was analyzed by spot analysis and image acquisition comparison.The results show that the bionic compound eye structure designed in this paper has the imaging function similar to that of insect compound eye,which verifies the effectiveness of the proposed optimization method in solving the low image quality of curved compound eye edge.