Design Of Multiaperture Variable Resolution Optical System And Study Of Image Reconstruction Technology

Field of view and resolution are the indexes to evaluate an optical system.The optical system with large field of view and high resolution is widely used in crowd monitoring and land measurement in dense places.However,for traditional imaging systems,the problem of combining large field of view with high resolution cannot be fundamentally solved without using a detector with higher resolution or an imaging system with better performance.Therefore,with the rapidly developed computational optical means in recent years and the combination of traditional imaging optical systems,the performance of both large field of view and high resolution can be improved at a limited cost^[1].This topic from multiple aperture imaging technique,with the aid of prism deflection field of the ability of design out of the visible light and long wave infrared two sets of multiple aperture optical prism array system,with the aid of image stitching method such as registration,can realize the overlapping area super resolution,not without losing the original resolution of overlapping area wide field variable resolution of target.At present,the multi-aperture imaging system can be divided into concentric structure and plane structure according to the relative position of the detector.The multi-aperture system with planar structure fails to increase the field Angle by a large margin.By virtue of the deflection ability of the prism to the field of view,that is,the Angle of view of one side is increased while the Angle of view of the other side is decreased.The size of the field of view after deflection can be approximate to that of the original field of view by selecting the appropriate wedge Angle,so as to ensure that the resolution will not be reduced by introducing the prism.At the same time,the color difference can be controlled by compound prism combination achromatic principle.In reference to other multi-aperture optical imaging systems that have been designed,this topic adopts the 3?3 array arrangement for the two sets of multi-aperture systems in the visible and infrared bands.For arrays of visible light,design parameters,eventually imaging field of up to140??105?full size less than 200mm?200mm?200mm.After the completion of the preliminary design of optical system needs to be processed with adjustable,using optimization good system physical live image acquisition,the nine aperture to obtain image preprocessing to prism is introduced into distortion correction,will be nine of orthoscopic image interpolation and projected to high resolution spatial grid,this topic using SURF algorithm and the characteristics of this paper design the area-joint method,using the pixel of image registration is a super resolution overlapping area,not without losing the original resolution of overlapping area wide field imaging effect.Meet the design specification of the system.