Design of a Multi-Scale Long-Focal Imaging System Based on Tessar Primary Lenses
In order to meet the demand for accurate identification of distant targets by improving the resolution of multi-scale imaging systems,from primary lenses focus,a design scheme of a multi-scale long-focal imaging system based on the Tessar primary lenses is proposed in this paper.Two constraints that need to be added to the primary len-ses for meeting the linear arrangement of secondary lenses are analyzed.In response to the problem of the imaging quali-ty degradation of the system as the off-axis angle of the secondary lenses array increases,synergy optimization is applied to the secondary lenses in adjacent areas.Additionally,free-form surface types are used to correct aberrations in the off-axis position optimization of the secondary lenses.The MTF curves of different field-of-view areas are consistent,showing that the system achieves ideal imaging quality across the full field of view.The spatial resolution of the multi-scale imaging system designed using the Tessar primary lenses structure is 14 μrad.Compared to multi-scale systems based on concentric spherical lenses,it is significantly higher.
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