Germanium windows, Germanium lenses

Alkor Technologies - Russian manufacturer of Germanium windows and Germanium lenses. We offer quality IR Germanium windows and lenses for thermography and pyrometry at low price. Please, do not hesitate to contact us for pricing for any custom size and coatings requirements.

Germanium windows catalog. Click here.

Germanium lenses catalog. Click here.

Maximum diameter of Germanium optics is 160mm. Anti-reflection BBAR coating (2-12mkm and 8-12mkm) and DLC coating can be applied for Germanium windows and lenses upon request.

Alkor is one of the largest Russian manufacturer of Germanium optics with 20 years experience. Germanium windows and lenses by Alkor are widely used in IR sensors, thermal image and medical applications, in pyrometry and thermography, FLIR cameras all over the world.

Germanium is used widely for lenses and windows in thermal imaging and FLIR applications. Its high index of refraction (about 4) makes it of particular interest. Useful transmission range of Germanium windows is from 2 to 13mkm. Germanium is opaque in the visible.

Germanium transmission. Window thickness 10mm.

Germanium has the property of thermal runaway, meaning that the transmission decreases as temperature increases. As such, Germanium window should be used at temperatures below 100°C. The Knoop Hardness of Germanium (780) is approximately twice that of Magnesium Fluoride, making it ideal for IR applications requiring rugged optics. Germanium’s high density (5.33 g/cm^3) should be considered when designing for weight-sensitive systems.

Custom germanium lenses are available in any size and configuration. Anti-reflection and DLC coatings can be applied for 2-14mkm or 8-14mkm (BBAR coating) depending on your custom application.

Refractive Index Germanium (germanium index of refraction)