Ge has high refractive index, The transmission wavelength for Monocrystal Germanium is 2-12um, it is a common infrared crystal which is widely used for infrared image system and infrared spectrograph systems. Ge has a small absorbency at 10.6um. It is a good material for CO2 lens and windows.
Ge has high refractive index, The transmission wavelength for Monocrystal Germanium is 2-12um, it is a common infrared crystal which is widely used for infrared image system and infrared spectrograph systems. Ge has a small absorbency at 10.6um. It is a good material for CO2 lens and windows. Three kinds AR Coating are available: 3-5 μm for mid-infrared applications. 3-12 μm for broadband multispectral applications, and 8-12 μm for thermal imaging applications.Germanium optical materials are also suitable to be used with wavelength of 8-12μm.Germanium is highly affected by temperature, and the transmittance decreases with increasing temperature; therefore, they can only be used below 100C.The density of germanium (5.33 g/cm3) should be taken into account when designing systems with strict weight requirements.Germanium is mainly used in thermal imaging systems and forward looking infrared (FLIR).Germanium has a Knoop hardness of 780, about twice that of magnesium fluoride, making it suitable for IR applications in variable optics.
|Absorptivity (1/cm)||1.3*10-3 @ 3800nm 3*10-2 @ 10600nm|
|Thermo-optical coeffecient, dn/dT (1/k)||4.08*10-4 @10600nm|
|Electrical resistivity||5-40 Ω.cm 1-5Ω.cm >50Ω.cm|
Refractive index range(20℃)
|Wavelength(nm)||Refractive index(n)||Wavelength(nm)||Refractive index(n)|
|Surface Quality||60-40 standard|
|Focal Length Tol.||+/-1%|
nSe is a good material for CO2 laser cutting and engraving machine, We select excellent material from USA, High transmission and high quality surface roughness. With high quality, we produce ZnSe plano convex lens, ZnSe plano concave lens, ZnSe meniscus lens,ZnSe Aspheric lens, Znse ball lens, and custom size ZnSe.View More