Research On High-Resolution Thin-Slice Imaging Technology Based On Interferometric Array

High-resolution slice imaging technology based on interferometric arrays is a new type of imaging technology based on the principles of interferometric imaging and photonic integrated circuit technology.Compared to traditional single mirror imaging technology,it has the advantages of small size,low weight,low power consumption,and resolution determined by baseline length,allowing it to achieve high resolution while maintaining low size and process cost.Therefore,the high-resolution slice imaging technology based on interferometric arrays is often used in fields such as astronomy,earth science,and military reconnaissance.The dissertation focuses on the various aspects of the slice imaging system and its research,which are summarized as follows:Firstly,the dissertation introduces the basic principles of slice imaging system imaging,as well as the components and modules of the slice imaging system.According to the system’s signal transmission model,the performance parameters of the system,such as field of view,resolution,and u-v coverage,are discussed,and the influence of various components and system structures on these parameters is explained.Based on the system’s performance requirements,an appropriate system parameter is proposed for practical applications.Next,the dissertation describes the structural modeling of the slice imaging system and the simulation method for its overall imaging quality.The influence of different system parameters on imaging quality is studied,and it is found that the number of interferometric arms and the baseline arrangement of the system have a significant impact on imaging quality.Furthermore,based on the conclusion that frequency coverage in the azimuthal direction has a greater impact on imaging quality,the concept of rotational imaging is proposed.The dissertation first proposes a specific rotational imaging method based on theory and verifies its feasibility through simulation.Then,an optimization scheme for the system structure of rotational imaging,the odd-even baseline slice imaging system,is proposed,which has a higher improvement in image quality compared to traditional structures.Finally,the dissertation compares two image reconstruction algorithms,MP-CLEAN and maximum entropy algorithm,and concludes that the maximum entropy algorithm is more robust and applicable to a wider range of situations,while the MP-CLEAN algorithm has stronger directional capabilities.The dissertation suggests that both algorithms be included in the rotational slice imaging system for user selection.Overall,this dissertation provides a comprehensive and in-depth analysis of the high-resolution thin-slice imaging system based on interferometric arrays,including its theoretical basis,component design,parameter selection,imaging simulation,and algorithm comparison.The conclusions drawn in this dissertation can serve as a valuable reference for future research and development,and contribute to the advancement of high-resolution imaging technology.