红外蓝宝石 CaF2 光学器件

锗球面透镜
锗球面透镜

锗球面透镜

锗具有高折射率,单晶锗的透射波长为2-12um,是一种常见的红外晶体,广泛应用于红外图像系统和红外光谱仪系统。 Ge的吸光度较小,为10.6um。是制作CO2透镜和窗口的良好材料。

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规格

锗球面透镜


光学特性

传输波长 2000nm—12000nm
吸收率 (1/cm) 1.3*10-3 @ 3800nm 3*10-2 @ 10600nm
热光系数,dn/dT (1/k) 4.08*10-4 @10600nm
电阻率 5-40Ω.cm 1-5Ω.cm >50Ω.cm


折射率范围(20℃)

波长(nm) 折射率(n) 波长(nm) 折射率(n)
2200 4.0879 8000 4.0057
3000 4.0451 9000 4.0040
3800 4.0267 10600 4.0028
5000 4.0160 11000 4.0025
6000 4.0107 12000 4.0021
7000 4.0079 13000 4.0018


制造规格

直径 5-270毫米
直径公差 +/-0.1
表面质量 60-40标准
平整度 1/4 波长
倒角 0.25mmx45度
焦距公差。 +/-1%
涂层 2-14微米

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