A Research Of Multi-resolution Imaging System

As a kind of optical imaging system with large field of view and local high-resolution,multi-resolution imaging system solves the disadvantages of traditional high-resolution imaging system,such as bulkiness,complexity and high price.When the multi-resolution imaging system works,only the local area is imaged with high resolution,and the corresponding data transmission of the imaging results will be reduced.The traditional multi-resolution imaging system does not have a large range of focusing function because of using the traditional lens,so it needs to move mechanically to adjust the focal plane position.As a high-precision and complex optical imaging system,this disadvantage will restrict the flexibility of the system.Therefore,the introduction of electronic focusing liquid crystal lens as a high-resolution imaging lens in the multi-resolution imaging system plays an important role in simplifying the imaging device and improving the application range of the imaging system.The multi-resolution imaging system with liquid crystal lens array as the core device avoids the use of mechanical focusing,improves the service life of the imaging system,and can achieve real-time tracking of moving objects without mechanical focusing.Secondly,most of the existing multi-resolution imaging systems need special design of detectors and optical systems,or special processing of the acquired images from the image layer.Whether the former makes special sensors and optical systems using spatial modulators,or other special designs of optical systems,it will increase the cost of the whole foveal imaging system;the latter the realization of foveal imaging on image level does not reduce the transmission bandwidth after image acquisition.In this paper,different optical systems are designed to achieve multiresolution imaging under the condition of ensuring the field angle of the original optical system.Firstly,the theory of multi-resolution imaging system is analyzed,and the working distance and effective area of the multi-resolution imaging device are calculated based on the imaging formula.A multi-resolution imaging system is built by combining the design and analysis of the liquid crystal lens array with the commercial optical group.The imaging system has multiple high-resolution regions of interest and the parts outside the high-resolution regions are fuzzy and low-resolution.The multi-resolution imaging device based on the liquid crystal lens can reduce redundant information while maintaining the field of view angle of the optical group.Secondly,the problem that the multi-resolution imaging device can't image the objects distributed in different space on the same image plane at the same time is solved by introducing the liquid crystal lens controlled by multi electrodes.Thirdly,for multi-resolution imaging system,the most important thing is to guarantee the detailed features of the object of interest as much as possible.In this paper,a kind of magnifying imaging system based on multi-resolution imaging system is proposed.The system uses a set of zoom optical lenses(the focal length of the lens group is 7.5mm when it is not working,and the F number is 5.6)with the liquid crystal lens as the aperture,and a liquid crystal lens is placed behind the optical lens group.When the multi-resolution amplification system works,the liquid crystal lens at the front of the variable focus optical lens group aperture works in the positive focus state to focus,and the liquid crystal lens at the back works in the negative lens state to enlarge and obtain the multi-resolution effect.At the same time,the image quality of the multi-resolution imaging system is analyzed,and the method of image integration is proposed to improve the image quality degradation of the interval part of the liquid crystal lens.