Preparation of Cut-off Filter of Infrared Penetration Based on 4.0～4.8μm
The design theory,design steps and related important formula of the cut-off filter membrane of inter-ference filter are illustrated in detail,and from the practical application,the 4.0～4.8 μm infrared penetration cut-off filter design process is expounded.Through the modern membrane design software optimization,the membrane lay-er performance is improved,and the filter to meet the requirements of the design index is prepared.The mean trans-missivity of the infrared cut-off filter is less than 3.5％at 1.6～3.5 μm cut-off band,is more than 90％at 4.0～4.8 μm cut-off band,and the filter layer can withstand temperature shocks from-190 ℃ to 60 ℃,showing the accuracy of the design and the feasibility of the preparation process.
infrared penetrationinterference filtercut-off filtertemperature shock resistancemembrane de-sign and process
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维普
