Single-crystal germanium lenses for mid-wave and long-wave infrared optical systems operating from 2um to 14um. High refractive index (n=4.0) enables compact, fast f-number designs ideal for thermal imaging, FLIR systems, and IR spectroscopy.
Germanium
Standard / Custom
Available specifications vary by material and configuration. Contact engineering for exact capabilities.
Germanium infrared lenses are fabricated from single-crystal germanium (Ge) for mid-wave and long-wave infrared applications. With a refractive index near 4.0, germanium enables compact, high-power lens designs for thermal imaging systems.
Use germanium lenses for thermal imaging (MWIR/LWIR), FTIR spectroscopy, and IR imaging systems operating from 2µm to 14µm. The high refractive index allows shorter focal lengths and more compact optical assemblies.
| Material | Availability | Spec Sheet |
|---|---|---|
| Germanium | Standard / Custom | See material page |
All materials are available in standard and custom thicknesses. Browse all 30+ optical materials →
Single-layer or multi-layer AR coatings for specific wavelength bands. Reduce reflection to below 0.5% per surface.
Dielectric HR coatings for laser mirrors and cavity optics. Reflectivity >99.5% at design wavelength.
BBAR coatings for wide spectral range applications. Low reflection across 400-700nm or other bands.
Optimized for specific laser wavelengths: 266nm, 355nm, 532nm, 1064nm, 10.6µm, etc.
Custom coating designs for unique wavelength ranges, angles of incidence, and polarization requirements.
Material and coating selection must be matched to your operating wavelength band. We can help optimize for single-wavelength or broadband use.
Surface quality, flatness, and centration tolerances directly impact cost. Our engineers can help balance performance requirements with manufacturability.
High-power or wide temperature range applications require careful material selection to minimize thermal lensing and wavefront distortion.
For harsh environments, consider material chemical resistance, coating durability, and packaging options. We can provide MIL-spec testing on request.
Every component undergoes comprehensive inspection before shipment. Our quality control process includes:
Documentation available upon request. Custom specifications require engineering review.
Germanium Infrared Lenses are used in optical systems where precise control of light is required. Common applications include laser systems, imaging, spectroscopy, and scientific instrumentation.
The usable wavelength range depends on the selected material and coating. Please refer to the material specifications above or contact our engineering team for guidance.
Yes. PhotonEdge offers custom diameters, focal lengths, and coating specifications outside our standard catalog. Custom specifications typically require 4-6 weeks lead time.
We offer a range of standard and custom coatings including AR, HR, broadband, and laser-line options. Coating selection depends on your wavelength range and application requirements.
Our manufacturing facility is ISO 9001:2015 certified. All components undergo rigorous inspection including dimensional verification, surface quality assessment, and coating performance testing.
Yes. Inspection documentation including dimensional reports, surface quality verification, and coating performance data can be provided according to project requirements.
Standard catalog components typically ship within 2-4 weeks. Custom specifications require 4-8 weeks depending on complexity. Contact us for expedite options.
Click the 'Request Engineering Quote' button above. Please provide your required specifications, wavelength, coating, surface quality, and quantity for an accurate quotation.
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