The Development Of Virtual Simulation System For Vortex Optical Tweezer Experiment Based On Unity3D

The virtual simulation for physical experiments is a method of simulating physical phenomena using computer technology and mathematical models.This method is aimed to provide students and teachers with a safe,convenient and efficient platform to explore and understand physical phenomena.In the context of the national promotion of information education,it is important to develop virtual simulation of traditional laboratories through virtual reality technology.Based on this,this paper chooses vortex optical tweezers as a representative research object,and takes the physical experiment content and demand of vortex optical tweezers capturing and rotating particles as the starting point to study the application of virtual simulation technology to the physical experiment of optical tweezers.The paper proposes a set of development process for converting traditional physical experiments into virtual simulation experiments,and realizes a virtual simulation experiment system with high interactivity and good visual effect.The simulation experiment is developed based on Unity3 D game engine,Blender modeling software and My SQL database,with functions such as free view roaming,experimental equipment selection,optical path construction,manipulation of experimental equipment,real-time display of experimental data,and login registration.The main works of this thesis are as follows:(1)Analysis and design of vortex optical tweezer physiccal experiment.The experimental principle and characteristics of capturing and rotating particles by using vortex tweezers are studied and analyzed,the experimental optical path is designed,suitable optical components and opto-mechanical parts are selected,and the experiment is finished in the physical laboratory.(2)Model construction of virtual simulation experimental scenarios for vortex optical tweezers.In order to choose various suitable modeling software,the impact of model data type and data volume on the response speed of the experimental platform has been investigated.Abandoning the mainstream 3Ds Max and instead using Blender and its threeparty plug-in to realize model building and optimization,to build the experimental platform model,and to lay the foundation for the subsequent development of the simulation experimental platform.(3)The development of virtual simulation system for vortex optical tweezers experiment.The functional requirements of the experiment are analyzed to determine the process and framework of system development.The modules mainly involved are light source,polarization control,CMOS camera,illumination,motion control,etc.The technologies involved include collision detection,ray detection,UGUI interface design,free view control and scene roaming,database design,etc.Finally,the whole virtual experiment platform is packaged and released.The virtual simulation experiment of vortex optical tweezers designed and implemented in the paper breaks many limitations of offline physics experiments,enriches and expands the presentation and functions of physics experiments,and can be applied in the frontier optical experimental teaching for undergraduate students.This paper gives the basic design idea and implementation method of the virtual simulation physics experiment,which is a complete virtual simulation physics experiment case,the research content and method can provide some reference for the development of virtual simulation physical experiment.