Research On Key Technologies Of Laser Glare System

The laser glare system can be widely used in security and anti-terrorism fields due to its non-blind and non-permanent damage characteristics.However,as the core of the laser glare system,the progress of research on the laser glare effect is slow,especially the research on the "high-efficiency retinal glare area" mainly composed of blue-green spectrum is very scarce.With the development of laser technology,the types of lasers in this spectral region are gradually increasing,the output power is greatly improved,and the prospects of application in medical,industrial and military fields are widely used,and the relevant practitioners will face a higher probability of retinal damage.Owing to the lack of laser glare and damage threshold data,Thelawaboutthe glare effectchange with the laser wavelength,illumination time and environmental factorshas not yet been clearly stated.In this thesis,the 540 nm and 525 nm wavelength lasers are used as laser glare sources,and the human eye reaction time(0.1~0.25s)is used as the irradiation time.The theoretical relationship between the laser and the ocular tissue is theoretically estimated and experimentally studied.The results are as follows.1.According to the theory of human eye imaging,the mechanism of laser glare effect is analyzed.Depending on the mechanism of glare effect,a human eye simulation system is proposed and constructed to achieve 540 nm and 525 nm wavelengths laser,different doses and wide range.The influence of different retinal imaging states on the laser glare effect is analyzed theoretically,and the correctness of theoretical analysis is verified by experiments.comparing the effects of different retinal melanin content on glare effect under the same illumination conditions,540 nm and 525 nm laser causing New Zealand white rabbit retinal damage threshold is significantly higher than cyan gray blue rabbit2.Study of the laser glare effect based on visual bioelectricity.It is found that the 540 nm laser glare effect is better than the 532 nm and 525 nm lasers under bright adaptation conditions.Under dark adaptation conditions,the 525 nm wavelength laser glare effect is the best.In addition,the continuous laser has low peak power.It is more suitable for glare than pulsed laser.The time-dependent characteristics of laser retinal damage threshold at 540nm/525 nm in the range of 0.1~0.25 s are obvious,which shows a mechanism different from the pulse laser glare effect;The glare irradiation range and the laser retinal damage threshold were obtained when the 540 nm and 525 nm lasers were irradiated for different illuminances from 0.1 s to 0.25 s.3.Establish human,monkey and rabbit eye change matrices,and estimate the threshold of three animal retinal damage from the theory.The animal comparison test was carried out.Under different environmental illumination,the retinal damage threshold of laser rhesus monkeys at 540 nm and 525 nm wavelengths was 2~2.4 times higher than that of cyan gray blue rabbits.4.Establish a mathematical model of adaptive control of laser irradiation quantity,and design an adaptive laser glare system based on mathematical model;research on high-power semiconductor laser according to the functional requirements of laser glare system.According to the functional requirements of the laser glare system,research on high-power semiconductor lasers has made some progress in improving power conversion efficiency and quantum efficiency.The ohmic contact of high-power A1GaAs/GaAs quantum well lasers is studied to improve the ohmic contact performance of the laser.High power conversion efficiency reduces Joule heat operation at high currents,thereby increasing output power.5.Using the experiments to verify the main technical indicators of the laser glare system,the laser energy output can be adaptively controlled according to the target distance under different environmental illumination;the range of the corneal irradiation is not exceeded in the range of 50m~200m.The upper limit threshold of the illuminance interval,the far field spot unevenness is less than 20%,and the glare duration is 9 s.The thesis develop laser glare system based on the key technology of laser glare effect.The development of this system provides theoretical support and experimental basis for the development or revision of laser safety standards.