Study On Films Of Wide-spectrum High-resolution Optical Remote Sensing Monitoring System

Ocean provides special and resource for human's progress,but the oil spills and red tide disasters occurred in the development and utilization of marine resources not only cause economic losses,but also cause great injuries to human health and marine ecological security.Both marine oil spills and red tides have their unique optical signals,and their effective detection through remote sensing monitoring technology is a great significance for monitoring the occurrence and spread of marine oil spills and red tides.Rely on the Wide-spectrum High-resolution Optical Remote Sensing Monitoring System combining optical information of red tide and oil spills the optical performance parameters of each optical element in the optical system are optimized,and mirrors,spectroscope and optical windows are developed by physical vapor deposition.According to the thin film theory and the theoretical properties of thin film materials,the problem of poor adhesion of the mateals reflective layer of the mirror is solved by the transition bonding method;the use of AL2O3 as the isolation layer reduces the corrosion of the metal layer by sulfides.For the spectroscope,based on the long-wave interference cut-off filter,the boundary layer is adjusted to solve the problem of the film's spectral boundary oscillation and improve the tolerance of the film to the cumulative error.Aiming at the shortcomings of the ultra-wideband optical costant calculation method of the traditional thin film material optical constant calculation method the envelope-full spectrum fitting method is proposed by combining the envelope method and the full spectrum fitting method,which overcomes the long calculation time of the conventional optical constant fitting in calculating the ultra-wideband optical constant and the shortcomings of self-calibration cannot be achieved.In the preparation of the film system,a new structure of ZnS molybdenum steam-proof boat was proposed for the defects of traditional ZnS in the deposition,and the corresponding steam-proof process was improved.The improved deposition process reduces the surface defects of the film caused by the deposition splash,improves the surface quality and flatness of the film,and obtains a more stable deposition rate,which solves the problem of the traditional boat in stability and surface defects in deposition method.Through statistical analysis of the causes of inversion of thin film drift,the residual evaporation is controlled to achieve the accuracy control of the thickness of the film deposition,reducing the spectral loss caused by the cumulative error,and combined with the actual preparation to eliminate spectral drift,the prepared films are all Meet performance indicators.Based on the principle of electrochemical corrosion to analyzed the principle of thin film surface corrosion,the annealing process was improved,and the in-situ atmosphere annealing promoted the further development of thin film grains,which solved the problem of poor corrosion resistance of the thin film.The experimental results were analyzed by the acetate salt spray experiment,and it was verified that in-situ temperature-annealing under atmospheric protection can improve the film's salt spray resistance and improve the film's application in marine environments.