Infrared Zoom Optical System Design With Wide Field

With the development of infrared photoelectric technology,the infrared zooming systems are playing increasingly important roles in long-range early warning,reconnaissance and navigation guidance due to the contributions of infrared photoelectric system in military fields.For a specific modern infrared military target,not only wide-field,long-distance,large-field imaging is required,but also requirements for detection,and precise identification of the target are put forward.Now,the traditional zoom imaging systems are only aiming at the direction of the high change ratio.As the modern military are rapidly demanding the infrared photoelectric system to perform higher-resolution real-time imaging of target in the wider area and larger range of view,more accuracy of small target detection and identification,I believe discussions are necessary for questions above.To meet high resolution requirements,traditional optical designs usually increase the aperture,focal length or anything else to complication the system by using multiple lens to correcte aberration to achieve high-resolution imaging will inevitably result in dramatically increase in the volume and weight,longer development cycle and engineering difficulties,which will also reduce the aperture.The main research contents are summarized in the following aspects:1.The needs of wide-field imaging applications in the field of zoom system has inspired me.In view of the current domestic and international situation that the infrared zoom system does not realize the detection and recognition capability of the photoelectric system at the same time,a high-resolution infrared zoom imaging with a large field of view is proposed in combination with a multi-scale method.The article explores the development direction of the new infrared zoom system.2.This paper presented the proportional relationship of the proposed lens system produced by Lohmann have been studied,and the method of realizing large-field-of-view and highresolution imaging based on the multi-scale stitching mode of a concentric ball lens is analyzed,and an analytical solution is provided for the design of the concentric spherical lens.3.This dissertation focuses on the zooming equations of the zooming system proposed in the infrared zoom system and uses the condition that the focal length of the components in the zooming process is invariable.The zoom equation is established and the distance between the components is used to solve the power distribution of the zoom system.Publicity,and then to solve the system component motion curve.4.Design and Simulation of Large Field High Resolution IR Continuous Zoom Optical System.In the implementation process,the aberration correction and the balance between the structure layers were considered,the two-layer structure of the spherical lens was selected to achieve two images with the zoom structure.Because the residual aberration of the optical main lens group is further corrected by using the secondary lens group and image quality were improved as well,so that the aberration of the images received on the detector is theoretically consistent.This design makes the image processing in the later stage a lot simpler.In summary,this paper starts from the actual needs and demonstrates the method of realizing large-field zoom imaging in a multi-scale manner.In the design process,the double spherical shell concentric ball lens is used to image the non-axial aberration;the secondary lens system is located at a certain position behind the primary image plane,and multi-group full-motion type systems are used to realize variable magnification imaging.The research results show that the large field of view high resolution infrared continuous zoom optical system based on the concentric ball lens can realize the conversion of the field of view during the zooming process and meet the needs of practical engineering applications.The system is of good quality and can obtain high resolution images.The system provides new ideas for the development of zoom imaging design.At the same time,the system has a long application prospect in underwater exploration,astronomical observation,remote sensing and biomedicine.