Optical Engine Design And Prototype Development Of 40 Inch Solid-state Volumetric True 3D Display

The solid-state volumetric true-3D display projects a serial of stereoscopic image slices with depth information to the 3D physical space.According to the visual persistence of human eyes,people can perceive the real physical depth of the image,which can be viewed directly with a wide angle,large color gamut,etc.The technical advantages of solid-state volumetric true-3D display make it one of the best promising solutions in the field of 3D stereoscopic display,favored by more and more potential users.This paper describes the common stereoscopic display technologies and summarizes its development at home and abroad.According to the system composition of the solid-state volumetric true-3D display,the technical route of the system is introduced.The high-speed DLP optical engine is used in the solid-state volumetric true-3D display.To satisfy the display's performance requirements,this paper designs a 4-UHP light source system with high brightness and uses the fly-eye lens to realize the uniform illumination.The contrast of the true three-dimensional display is improved by designing a novel prism.In order to resolve the display difference among the layers of LC shutters and reduce the size of the prototype,a short focal projection lens with a larger working distance is designed.Four mirrors with high reflectance are used to fold the light path,which helps to reduce the whole volume of the body.The mec hanical structure of each functional part of the prototype is also designed.According to the design of the optical engine and the mechanical structure,40-inch solid-state volumetric true-3D display engineering prototype is developed,demonstrated,and tested.The practical demonstration results indicate that the 3D sense of the display is much stronger.The displayed image looks smooth.The prototype achieves a realistic reconstruction of space objects by creating real image depth of the field of physics.The stability of the mechanical structure design and the supporting design is so good that the display can work with a long time in a normal and stable way.The design of the high speed optical engine is fully applicable to the 40-inch solid-state volumetric true three dimensional display prototype.