Flexible Augmented Reality Chromatic Display

Augmented Reality(AR)as a hot spot in the field of information display technology,with the continuous heating up of the concept of the metaverse,has shown great application value and research potential in both military and civilian areas.Because of its thinness,high transmittance,and small dispersion,the waveguide display is considered the mainstream optical solution for the consumer-grade AR optical machine module.At present,there are still many problems such as small field of view,large size,unwearable,and high product price.There is an urgent need to break through key technologies such as low-dispersive waveguide design,lightweight overall structure,and flexible optical systems to meet the needs of consumer markets.In this paper,a flexible color augmented reality imaging system based on waveguides is studied,and the flexible waveguide is used for the first time for the near-eye display module,and a flexible color imaging module with both geometric optical waveguides and light,thin and flexible color waveguide imaging display light machine modules is developed.The optical system design and optimization,optical component development,module assembly,and experimental verification were completed,the flexible bending imaging characteristics of the designed module were confirmed,and the main research content and obtained results were as follows:(1)The design scheme of the flexible color waveguide imaging system was determined.The system is designed in two parts: an imaging system and an eyepiece system.The imaging system is responsible for deflecting and dilating the light;the eyepiece system is responsible for imaging the light of the miniature display.The calculation of the structural parameters of the optical system is completed,and the system indicators and distribution are clarified.(2)Completed the design and optimization of the flexible color waveguide imaging system: the simulation design was carried out by Zemax,the stray light optimization was carried out with Trace Pro,and the final system working band was 400-700 nm,the pupil diameter was 8mm,the field of view angle was 30°,and the thickness was 1.5mm.At the cutoff frequency of 71lp/mm,the modulation transfer function value of the full field of view is greater than 0.1,the distortion is less than 5%,and in the case of the bending radius of the waveguide deformation is greater than 500 mm,the modulation transfer function value of the full field of view is greater than 0.1 at the cutoff frequency of 15lp/mm,which ensures the observation experience of the large field of view at the pupil of the human eye.(3)Developed a module of a flexible color waveguide imaging system.Completed the system tolerance analysis,determine the tolerance range of the system metal mold and eyepiece system,then process the imaging system based on the prepared metal mold,process the eyepiece parts,and finally glue the prepared image system and eyepiece system to assemble,and complete the development of the flexible waveguide system principle prototype for the first time.(4)The imaging characteristics of flexible color waveguide imaging are verified: based on the flexible color waveguide light machine,an experimental platform is built,imaging verification is carried out,and the waveguide substrate is attached to different curvature substrates to test the imaging quality of the waveguide under different curvatures,and the results show that the system can realize imaging in both plane and bending forms.The field of view,diameter,and size of the system is tested,and the consistency of the optical parameters of the system and the design parameters is verified.This paper proposes and designs a set of flexible color waveguide AR optical machine modules for the first time,which ensures the lightweight and mass-produced replicable characteristics of the system while achieving a large field of view and high image quality;at the same time,the system has two forms of plane and bending,which can be applied to different complex application environments,providing a new choice for augmented reality display solutions,and is expected to promote the application and development of high-quality color augmented reality applications in the future.