| Optical synthetic aperture imaging system is the optical system which can get similar spatial resolution with large-aperture optical system with the calculated observing results by a number of sub-apertures according to certain rules of permutation and combination in space in place of a large regional aperture.Synthetic aperture imaging optics is important future of high-resolution imaging system design and research with broad prospects.First,the paper introduces the background and significance of optical synthetic aperture imaging technology,optical synthetic aperture imaging technology in two ways,research at home and abroad,and then compares their characteristics and puts forward the contents of the study.Secondly,the paper introduces Fourier optical imaging theory through the establishment of optical imaging system,diffraction limited imaging of non-coherent model.Then the paper clarifies the imaging principle of sparse-aperture imaging system by Fourier optical analysis,supplies the formula of point spread function and modulation transfer function,then introduces their characterized index.Thirdly,the paper studies three typical structures by Fourier optics,puts forword the criteria and the general steps of sparse aperture array structure optical system optimization,gives detailed steps of array structural optimization.Then,the paper studies image restoration technique of improving the quality of sparse-aperture imaging system,puts forword sparse-aperture systems of image restoration by Wiener filtering technique.The results shows that image quality improve significantly.Last,the paper optimizes the Golay6 structure by the application of mentioned criteria above,puts forword a method of optimization through the related lattice grids,and gets a new type of optimized Golay6 structure.The study does theoretical analysis and simulation to the optimizes results.The results shows that the image quality can be significantly improved by the optimized structure. |
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