Research And Design Of Single Image Source Binocular Near-eye Display Device Optical System

As optoelectronic technology develops, wearable devices are developing more and more quickly, such as smart glasses, head mounted displays, which are made to be virtual reality devices and augmented reality devices. Human beings can well interact with external information through these devices.In this thesis, a single image source binocular near eye display is designed, which is defined as augmented reality device. This device, based on DLP technology, with special optical system design, just use one image source to design binocular near eye display, and at the same time, human can also see the real world through splitter.In this thesis, the main contributions of this thesis are: the design of the whole optical system structure and calculation of system parameters; the design of illuminating optical system; the design of imaging optical system; the analysis of the whole system and prototype test. Details are as follows:(1)The original optical system is conceived and parameters are set. The projector optical system based on DLP technology is used as the original optical system of near eye display; design an optimal illuminating optical system and a binocular optical system. We make choice of LED light source and DMD to make sure the device is compact and intelligent. By analyzing the characteristics of human eye, the field of view, exit pupil diameter and eye relief are defined after experiment and calculation.(2)Illuminating optical system is designed. Illuminating optical system is designed based on non-imaging optics, including condenser design, fly eye design and relay lens design. The convergence light beam emitted by LED will become a homogeneous rectangular spot on the DMD surface, after collimating and uniform by condenser and fly eye, and focusing by relay lens.(3)Imaging optical system is designed. Imaging optical system is designed based on imaging optics and aberration theory. The light emitted from LED incident on DMD, then reflected from DMD, and finally enters human eyes. A magnified virtual image is formed in front of human eyes. Splitters are used to achieve augmented reality. Necessary aberration analysis and tolerance analysis is done after the imaging optics design.(4)The whole optical system is analyzed. The size and function is analyzed, and a prototype is made.