Optical Design And Simulation Of Adaptive Non-Vertigo Virtual Reality Glasses

Virtual reality technology combines optics,information technology,and electronics and so on to make virtual images imaging to human eyes.So that users can get experience similar to the real environment.In recent years,virtual reality system has gradually been used in aerospace,education and scientific research,medical devices,games and entertainment,military and other fields,and will even subvert the traditional development model of many fields.However,there are still technical bottlenecks in the research of virtual reality.For example,using devices to watch videos can cause vertigo.This paper aims to fill the gap between simple virtual reality devices and high-end devices,reduce user vertigo,and design a set of high-quality,portable,low-cost,well-experienced virtual reality devices.Based on the physiological structure of the human eye,this paper introduces the visual characteristics of the human eye and the indicators should be considered in the optical design of virtual reality.On this basis,three solutions of adaptive non-vertigo virtual reality glasses are provided:A Fresnel lens with a curved surface is designed.Freeform surface lenses can improve image quality and reduce lens thickness.Fresnel surface can make the lens lighter and thinner,which is considered to enhancing the user experience.The entrance pupil of the system is 5 mm,the field of view angle is 80 degrees,the exit pupil distance is 15 mm,and the material is PMMA.The image quality is better,the quality is lighter,and the user experience is convenient.The image quality of the curved screen is analyzed.It can be seen that the curved screen provides additional degrees of freedom for the optical system,which can improve the field of view.The maximum half field of view is raised from 40 degrees to 46 degrees.The curved screen has 15% more field of view than the traditional flat screen.Without increasing the size of the virtual reality optical system,the edge field of view resolution can be maintained.A zoom virtual reality optical system is designed.The zoom method is negative compensation.The refraction is adjusted by using aspheric zoom lens combination.Finally,the zoom range is 38 mm to 46 mm,the aperture is 4.6 mm,the field curvature of each zoom position is less than 0.5,and the distortion is less than 1%.The spot diagrams are close to the size of the pixel,so it is a zoom structure with good image quality.At the same time,a low-cost vision adjustment solution is proposed,which has better image quality,lower cost and simple operation.It can be used in low-end virtual reality system,and can be adapt to the visual state of some users,so as to improve comfort and reduce vertigo.The principle of integrated imaging and the properties of microlens arrays are analyzed.Then the process of obtaining and recording real scene three-dimensional image information by using microlens array integrated imaging technology and realizing the acquisition and recording of virtual reality stereo video source is introduced.The structure calculation of microlens arrays and the optimization design of main lens are carried out.Finally,the optimized lens and microlens arrays are combined.Optimal design of the system is carried out.Its half of FOV is 44 degrees,pupil diameter is 8.2 mm,field curvature is less than 4,distortion is less than 0.2,RMS of each field of view is less than 0.53.The whole system has compact structure,small quality and good image quality.