Research On Optical Properties And Display Mechanism Of Lens (Pinhole) Array

Integrated stereoscopic imaging is an emerging naked-eye 3D display technology,which has the advantages of no visual fatigue and no need for auxiliary equipment.The technology has been widely used in the process of collecting and reconstructing for small scenes,but has few applications in large scenes.The LED large-screen has the advantages of long life,high brightness,convenient splicing,etc.It's easy to build integrated stereoscopic imaging system for large scenes if the LED large-screen is used as a display device.However,the image quality of the integrated stereoscopic imaging display system based on LED large-screen can not meet the needs of viewing,which greatly limits the development of LED large-screen integrated stereoscopic imaging technology.In order to increase the depth of field of the reconstruction image,the meniscus lens is applied to the integrated stereoscopic imaging display system.The extended field of view of the reconstruction image is realized by using an enlarged array of element image.The specific research contents are as follows:During the experiment and simulation,the combined array of lens/pinhole is used to filter out stray light from the lens array gap.In order to improve the depth of field of the reconstruction image of the integrated stereoscopic imaging system based on the LED large-screen,By studying the relationship between the lens parameters and the depth of field,an integrated stereoscopic imaging display system using the lens array composed of the meniscus lens as the optical element is designed.The simulation analyzes the crosstalk distribution of different shape lenses to adjacent lenses of a single pixel and the influence on the acquisition and reconstruction process of the letter model.The experimental results show that the meniscus lens can increase the reproduction depth of the reconstruction image further under the premise of constant resolution.In the reconstruction process,the effect of crosstalk between pixels on the reconstruction image quality can be effectively reduced,and the imaging quality can be improved.In order to enlarge the field of view of the display system,according to its main influence parameters,a new element image is created by increasing the image size of the element image,using the characteristics of LED large-screen high-speed refresh and combining time-division multiplexing.The reconstruction image in the imaging space is expanded by utilizing the persistence phenomenon of the human eye.Reconstruct and analyze the captured element images using integrated stereoscopic imaging display system based on LED large-screen.The results show that the reconstruction image obtained by the method described in this paper is more full-color,compare with the traditional integrated stereoscopic imaging system.The field of view is expanded by 1.36 times and does not require additional optics.Through the above two methods,improving performance of integrated stereoscopic imaging system based on LED large-screen,and there is no additional complex structures,which is more conducive to promoting its wide-scale promotion.