Our Germanium Infrared (IR) Aspheric Lenses provide diffraction limited focusing performance over a broad spectral range in the mid- and long Wave infrared regions. Ideal for monochromatic light sources, such as quantum cascade lasers, these lenses offer a high performance alternative to standard plano-convex lenses.
Each aspheric lens is available non-coated, or with BBAR coating options. Uncoated germanium has transmission of <50%, so custom anti-reflection (AR) coatings should be considered if specifying an uncoated lens. Each BBAR coated lens offers >95% transmission and <0.5% reflection, making it ideal for integration into a variety of OEM applications. For custom design or coating options, please contact us.
Possible lens geometries:
- Fresnel and diffrax patterns
- Off -axis
- Parabola’s, ellipses
- High purity silicon
- Part size germanium: till 240 mm
- Part size silicon: till 150 mm
- Surface Roughness (Ra): < 5 nm
- Form accuracy (PV) < 300 nm
Please inform us if you have different specification needs.