Our Germanium lenses are perfect for Mid-Infrared applications. These lenses stand up well to harsh environments and we offer the most popular sizes with Anti-Reflection Coatings. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these lenses 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 is 780, making it ideal for IR applications requiring rugged optics.
GERMANIUM LENSES
- High Index of Refraction
- Minimal Chromatic Aberration Due to Low Dispersion
- Perfect for Rugged IR Applications
- Popular Sizes Available with AR Coating from 3-12μm
Factory Standard– Contact us for manufacturing limit or custom specifications
- Substrate Material: Ge (Germanium)
- Diameter: 5mm-350mm
- Shape: Spherical Plano-Concave, P-Convex, Concave-Convex or Aspheric
- Focal length: +/-1%
- Surface Quality: 20-10(after coating)
- Surface figure: l/4 @ 633nm
- Clear Aperture: >85% of central dimension
- Antireflection Coating: @ 3-12 um