Combined Laser Destruction Glare System Key Technology Research

With the global counter-terrorism situation continues to be severe,various forms of terrorist activities occur frequently,domestic extreme personal violent crime has also become a high incidence of events,once the dangerous events,the need for police personnel to quickly,efficiently,on-site disposal.If not handled in a timely manner,often resulting in casualties and property damage,serious harm,police personnel in the process of on-site processing will be faced with the event at all times dangerous,deadly and irreversible,the psychological,physiological pressure sustained throughout the end of the mission.Laser weapons are widely used in counter-terrorism missions because of their fast attack speed,precise aiming,flexible response,and highly concentrated energy,but the current laser weapons used in counter-terrorism are relatively single and limited in their role.Therefore it is crucial to combine both laser destruction and dazzling functions into one multifunctional non-lethal laser weapon.In this paper,laser beams of two different wavelengths,visible and near-infrared,are used to share an optical zoom system through coupled prisms to achieve a laser weapon with visible light dazzling the human eye and near-infrared burning the human skin in one.The transmission of laser light is hyperbolic and its energy is Gaussian distributed in space.Due to the inhomogeneity of energy,too low an energy cannot produce a dazzling effect and too high an energy can be harmful to the human eye.Therefore,in laser glare applications,its energy distribution must be uniform.In this paper,several options for homogenizing the beam are analyzed,and after comparison,the aspherical lens set is chosen to homogenize the laser beam in this paper.The parameters of the aspheric surface are derived using the flat-top beam and its transmission theory.Finally,zemax software is used to optimize the design,and the beam uniformity reaches about 60%.In order to meet the laser destruction glare can be achieved at different distances,this paper selects the mechanical compensation type as the structure form of zoom compensation by comparing several forms of zoom system through detailed analysis.Based on the principle of object-image exchange and focal length change principle based on the proposed a three-mirror group based on the variable spot of the zoom optical system,and the use of zemax software for its optimization simulation analysis.The results show that the variable focal length optical system can be adjusted by adjusting the parameters of the optical system to make its focal length change,so as to achieve the requirements of dynamic imaging of the optical system to achieve laser destruction and laser glare.Finally,zemax software is used to optimize the design of the optical system for destruction and glare.Experimental test shows that the laser spot diameter of 5mm-15mm and power density of 80W/cm~2-100W/cm~2can be achieved within the distance of 50m-500m.skin burns.Laser glare beam to the target power density range of 0.98)/~2-1.398)/~2,can achieve a distance of 50m-500m range of laser spot diameter of 1m,the dazzling of the human eye.