Design Of Wide Field Of View High Resolution Multi-scale Multi-aperture Computing Imaging System

Wide field of view and high resolution imaging system is widely used in many areas,but the relationship between the field of view and the resolution of traditional uniaxial optical system is contradictory when the detector is determined,some innovative imaging methods can effectively solve this problem,so it has both theoretical and practical significance for the design of this kind of imaging system.According to the multi-scale and multi-aperture imaging technology in the computational imaging method,this paper first explains the proportion rule of optical system,and compares the traditional optical system with the computational imaging system.Then two kinds of optical systems are designed and studied,which breaks through the imaging limitation between large field of view and high resolution of traditional imaging system,and completes the design of optical system with both of them.In the first part of this thesis,the structure of infrared multi-scale multi-aperture optical imaging system is designed.Based on the theoretical analysis of a large number of multi-scale and multi-aperture imaging,the objective lens is designed as a spherical lens to collect the field of view.The optimized composite spherical lens has good imaging effect,but its cutoff frequency is relatively low.The middle image of the spherical lens is imaged by camera array,and the residual aberration of the spherical lens is corrected.Finally,the design results of the micro-structure system with good imaging effect are obtained.The focal length of the whole system is 20 mm,which works in the long wave infrared.The field of view is 32 °× 32 °for 9 microcamera structures,and 52 °× 52 °for 25 microcamera structures.The MTF in different viewing fields are basically consistent and close to the diffraction limit.The final design results show that the imaging quality is good.The other imaging system can increase the angle of view in positive direction and decrease the angle of view in negative direction by using the deflection ability of prism to light,and realize the expansion of the field of view of camera in different directions,thus the whole field of view can be extended.There is a certain overlap in the field of view between the adjacent cameras.By using the mixing information of the overlapped region of the field of view,the resolution of different regions of the field of view can be different,and the resolution from the center to the edge can be changed to realize the function of foveal imaging.The whole structure is arranged by 9 cameras and the corresponding achromatic prism with different wedge angles,while the industrial camera for lens and detector selection.The system works in the visible wave and can realize the field of view of 140 °× 105 °.The resolution of the field of view can be increased by about 2 times,and the overall structure is smaller than 203 cm.The result of imaging simulation can meet the requirements of the design.Both of the systems are based on the design of multi-scale and multi-aperture optical systems,and can achieve both wide field of view and high resolution image acquisition by means of image processing,without the influence of sensor size and optical processing,and it is an effective method to realize high resolution and wide field of view of imaging.