Ge Windows and Lens

Lwir Ge Windows are used to isolate different physical environments while allowing light to pass. When selecting windows you should consider materials, transmission, scattering, wavefront distortion, parallelism and resistance to certain environment. A window is parallel usually with anti reflection coating.

Due to every Single Crystal Ir Germanium has high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating, such as Germanium With Dlc Coating or BBAR COATING, is recommended on these windows for sufficient transmission in the region of interest.

Germanium (Ge) Windows are available off-the-shelf with three anti-reflection coating options: 3 - 5μm for mid-infrared applications, 3 - 12μm for broadband multispectral applications, or 8 - 12μm for thermal imaging applications. Due to its high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating is recommended on these Germanium windows for sufficient transmission in the region of interest. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these Germanium windows should be used at temperatures below 100°C. Germanium’s high density (5.33 g/cm3) should be considered when designing for weight-sensitive systems. The Knoop Hardness of Germanium (780) is approximately twice that of magnesiμm fluoride, making it ideal for infrared applications requiring rugged optics.

Zoolied Inc. Optical Windows are offered in a variety of substrates, such as Silicon Windows, N-BK7(H-K9L), Ir Znse Windows, and single Crystal Caf2 Windows. Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, LWIR, or Infrared (IR).

Note: Please pay attention to your email at any time after inquiring, we will send you the quotation by email.