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Germanium Lenses

Featured Product from Avantier Inc.

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Our germanium lenses also come with BBAR (broadband anti-reflection) coatings, which further enhance their performance, particularly in the desired wavelength range of 3-12 μm. These coatings maximize light transmission, reaching up to 95% in some cases.

Incorporating germanium transmits, which is a unique characteristic of this material, these lenses excel in mid-infrared light applications. The inclusion of AR coatings further boosts their transmission capabilities, allowing for superior image quality and clarity.

Among our offerings, plano-convex germanium lenses stand out for their utility in light collimation and focusing applications. These lenses find widespread use in diverse fields, including science, industry, and defense.

Our aspheric germanium lenses deserve special mention as they tackle the challenge of eliminating spherical aberration in optical systems, leading to simplified setups and even potential weight reduction in certain cases.

To ensure precision, our factory adheres to stringent standards for surface quality, achieving a 20-10 scratch dig rating, even after coating. This level of quality is suitable for most laser applications, guaranteeing reliable and high-performance germanium lenses for your needs.


Germanium Optics Standards

  • 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