作业帮为什么增透膜用SiO2溶胶
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为什么增透膜用SiO2溶胶
为什么增透膜用SiO2溶胶
为什么增透膜用SiO2溶胶
这么说你的光学基片应该是玻璃了.选用何种材料为增透膜,要看光学基片的折射率,增透膜的折射率应为光学基片折射率的平方根.玻璃的折射率约为1.52,这就决定了其增透膜的折射率应为1.23.致密二氧化硅膜层的折射率为1.46,还是不能用做玻璃的增透膜.因此,你说的二氧化硅溶胶,应该是由STOBER法制得的,即原料为正硅酸乙酯、乙醇、氨水和水,所得溶胶中二氧化硅为颗粒状.二氧化硅溶胶镀膜后,颗粒状的二氧化硅粒子在玻璃表面随机堆积,形成多孔的二氧化硅膜,其孔隙率约50-60%,折射率为1.22左右,因此可以对玻璃实现近100%的增透.欢迎你阅读我的文章并引用我的文章.
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不知道啊 hehe