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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 lens specification or based on clients' requirements


1.Material

Germanium

2.Dimensional tolerances

0/-0.05mm

3.Surface flatness

人/4@633nm，per 25.4mm diameter

3.Clear aperture

＞90%

4.Centration

1 arc minute

5.Surface quality

Infrared 40-20

6.Edge Chip

＜0.1mm

7.Bevel

Based on clients' requests

8.Coating

Apply Infrared AR coating or based on client requests