89-559 12.5 mm Dia. Germanium Protective Flat Window; t=1 mm BBAR 3-5µm

The 89-559 is a 12.5 mm diameter Germanium Flat Window, with a thickness of 1 mm, designed for protective purposes. This Window boasts a Broadband Anti-Reflection (BBAR) coating on both the front and back surfaces, specifically optimized for the 3-5 µm wavelength range. The Window is sourced from the reputable vendor, Edmund Optics, and is currently in stock, as indicated by its weblink status.

The Germanium material of the Window is identified as "germanium burnett", and it is designed to operate at a wavelength of 4000 nm. The BBAR coating on both surfaces enhances the Window's performance by reducing reflection and increasing transmission, making it an ideal choice for applications that require high transmittance in the specified wavelength range.

The Window's geometry is defined by its diameter and thickness. With a diameter of 12.5 mm and a thickness of 1 mm, it offers a compact and robust solution for various optical systems. The Window's base shape is circular, and its shape is classified as a Thin Lens, further emphasizing its suitability for a wide range of applications.