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Oct82026
Lenses & Optical Components germanium lens and window

What Is Germanium Used for in Infrared Optics?

Lenses & Optical ComponentsBy giai2026-10-08

Germanium (Ge) is used in infrared optics primarily to manufacture thermal imaging lenses, infrared windows, protective sensor optics, and components for infrared measurement systems. Its useful transmission range extends approximately from 2 to 14 μm, covering important mid-wave infrared (MWIR) and long-wave infrared (LWIR) regions.…

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Oct82026
Optical Materials & Infrared znse vs germanium transmission range illustrative

ZnSe vs Germanium for Infrared Lenses

Optical Materials & InfraredBy giai2026-10-08

Germanium suits 8–12 µm imaging lenses: an index of 4.0 and very low LWIR dispersion keep element count and curvature low. ZnSe suits high-power CO2 laser optics: its bulk absorption at 10.6 µm is far lower and it has no thermal runaway. Germanium absorption rises…

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