Si/Ge Windows and Wafers

Zoolied offers Infrared Ge Windows with a diameter of 12.5mm, which support BBAR coating@3-5μm/3-12μm/8-12μm coating. Germanium, including Lwir Ge Windows, typically used in IR imaging systems, transmits below 50% 1.8-14 µm but can be custom produced with specialised antireflective coatings in order to boost transmission performance by over 100%.

Zoolied Single Crystal Ir Germanium is 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’s Optical Windows are offered in a variety of substrates, such as Silicon Windows, N-BK7(H-K9L), Germanium With Dlc Coating, ZnSe Windows, and Ir Znse Windows.

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