Research On The Property Of Light Scattering From Two-Dimensional Fog Screen Imaging Technology

Aerial imaging technology is widely used in commercial,medical,entertainment,smart home and other fields due to its good use for customers' experience and its cool viewing effects.Two-dimensional fog screen imaging technology is a specific implementation of aerial imaging technology by spraying artificial water mist particles into the air form a fog plane for imaging,the images suspend and display in the air.At present,the thickness of the fog screen put into commercial application is 30 mm,the light transmittance is low,the imaging effect is not perfect,and the image quality needs to be further improved.In order to solve the problem of low transmittance of artificial two-dimensional fog screen,this paper analyzes the relevant parameters affecting the transmission of light in the fog screen according to the scattering characteristics of light in the fog screen,which is determines by the structure of two types of high transmittance fog screens.In this paper,the scattering characteristics of artificial water mist particles that constitute the main components of the fog screen and two-dimensional fog screens are studied.The scattered light intensity distribution,scattering phase function and asymmetry factor of artificial water mist particles were simulated by using the spherical particle Gustav Mie scattering theory,which combined with the complex refractive index of artificial water mist particles.Based on the droplet distribution model of artificial water mist particles,the visible light scattering parameters of the polydisperse artificial water mist thin layer were calculated.Monte Carlo method was used to simulate the transmission characteristics of visible light in fog screen,and the factors affecting the transmission and reflection of visible light in two-dimensional fog screen were analyzed.The simulation results show that the scattering characteristics of visible light in a two-dimensional fog screen are related to the thickness of the fog screen structure,the projection angle,and the wavelength of the projected light.The transmittance of visible light in a two-dimensional fog screen can be improved by reducing the thickness of the fog screen structure,selecting a suitable projection angle,and projecting the light source.In addition,the experimental system was designed and built,and the fog screen imaging experiment was carried out.The size of the designed system: 70cm-long,45cm-wide,180cm-height.It consists of a fan array module,a water mist transmission module,a gas flow filter module and an ultrasonic atomization module.As a result that produces the fog screen of 25cm?1cm?15cm and 25cm?0.1cm?15cm.A fog screen imaging experiment with a thickness of 10 mm and 1mm was successfully carried out,and the angular distribution of the scattered light intensity transmitted through the fog screen in space was measured.Imaging experiments verify the correctness of the simulation results.