Brand: XZOP

Material: Germanium

Finish: 60/40 or 40/20

Shape: square/circle/lens

Standard: US military standard

Introduction: The wide light transmission range of germanium materials and the opaque characteristics of visible light bands can also be used as long-pass filters for waves with wavelengths greater than 2 µm. In addition, germanium is inert among air, water, alkali, and many acids. The light-transmitting properties of germanium are extremely sensitive to temperature; in fact, the absorption of germanium becomes so great that it hardly transmits light at 100 °C, and it is completely opaque at 200 °C.

Product Details:

The germanium material has a high refractive index (approximately 4.0 in the 2-14μm band). When used as window glass, it can be coated as needed to increase the transmittance of the corresponding band. Moreover, the transmission properties of germanium are extremely sensitive to temperature changes (the transmittance decreases with increasing temperature), so they can only be used below 100°C. The density of germanium (5.33 g/cm3) should be considered in the design of systems with strict weight requirements. The germanium window has a wide transmission range (2-16μm) and is opaque in the visible spectrum, which is particularly suitable for infrared laser applications. The Knoop hardness of germanium is 780, which is about twice the hardness of magnesium fluoride, which makes it more suitable for applications in the IR field of changing optics.

Application areas:

Infrared laser, infrared thermometer, infrared thermal imager, infrared lens, etc.