To address the problem of traditional unmanned aerial vehicle(UAV)imaging systems being unable to achieve the coexistence of large field of view and high resolution,a large field of view and high-resolution UAV-borne compound eye camera system composed of a curved sub-eye array,an optical relay system and an image detector was designed.The non-spherical design was used for the relay system to reduce the system volume.Each sub-eye had a focal length of 20 mm and a field of view of 10°.The relay system used a fisheye lens with a focal length of 7 mm to convert the curved focal surface formed by the sub-eye array into a planar image.The overall system had a field of view of 122°×106°,an F-number of 3,and a focal length of 3 mm,achieving a ground resolution of 0.8 m at a flying height of 1 000 m.The simulation results show that the modulation transfer function(MTF)of each optical sub-channel is greater than 0.3 at 208 lp/mm,and the image quality of the system meets the requirements within the given tolerance range.Compared to existing UAV-borne compound eye systems,the proposed system offers a larger field of view,higher resolution and smaller size.
large field of viewcompound eye cameraoptical designtolerance analysis
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