Ge Windows and Lens

Due to Germanium's high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating is used to these germanium windows for abundant transmission in the region of interest.
Lwir Ge Windows with AR COATING are 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 magnesium fluoride, making it ideal for infrared applications requiring rugged optics. LWIR Ge windows
Optical Windows are flat, plane-parallel plates that are often used as protective barriers for electronic sensors or detectors from outside environments. Optical Windows should be selected based on the material transmission or mechanical properties of the substrate. Optical Windows do not cause change in the magnification of a system. Zoolied Optical Windows are offered in a variety of substrates, such as Dlc Coating Silicon Windows, N-BK7(H-K9L), UV Fused Silica, Germanium With Dlc Coating, and single Crystal Caf2 Windows. Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR). Zoolied offers standard and high precision optical glass windows in round ,rectangular, wedge windows and custom shape and size with different optical glasses,Fused Silica, Sapphire, ZnSe, Zns and IR crystal. The high precision parallelism of 10 arc seconds, surface quality of 40/20 and flatness of λ/10. Single layer or multi-layer anti-reflection coatings are available.

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