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Due to its broad transmission range (2.0 - 16 μm) and opacity in the visible portion of the spectrum, Germanium (Ge) is well suited for IR laser applications. This makes it an ideal choice for biomedical and military imaging applications. In addition, Ge is inert to air, water, alkalis, and acids (except nitric acid). Germanium's transmission properties are highly temperature sensitive; in fact, the absorption becomes so large that germanium is nearly opaque at 100 °C and completely non-transmissive at 200 °C. Ge has an index of refraction of 4.004 at 10.6 μm.
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Due to its broad transmission range (2.0 - 16 μm) and opacity in the visible portion of the spectrum, Germanium (Ge) is well suited for IR laser applications. This makes it an ideal choice for biomedical and military imaging applications. In addition, Ge is inert to air, water, alkalis, and acids (except nitric acid). Germanium's transmission properties are highly temperature sensitive; in fact, the absorption becomes so large that germanium is nearly opaque at 100 °C and completely non-transmissive at 200 °C. Ge has an index of refraction of 4.004 at 10.6 μm.




Germanium dome cover specification or based on clients' requirements


1.Material

monocrystalline germanium

2.Diameter tolerances

+0/-0.1mm

3.Clear aperture

90%-100%

4.Tolerance of CT or ET

±0.05mm

5.Surface Quality

Infrared 40-20

6.Curvature Tolerance

±0.01%

7.Surface flatness

入/4@633nm

8.Centration

30 seconds

9.Focal length

±1%

10.Edge Chip

＜0.1mm

11.Bevel

Based on clients' requests

12.Coating

Apply AR,Conductive coating（ITO）or based on client requests