Germanium Infrared Lens
Product Categories:
Germanium Infrared Lens｜The "Transparent Armor" for Thermal Imaging Systems
— Leveraging germanium's inherent infrared advantages to craft a high-transmittance, weather-resistant "visual window" for precision optical systems
Core Value
Germanium single-crystal based infrared lenses harness germanium material’s 2-16μm wide-band high transmittance (>90%), combined with a high refractive index (~4.0), low dispersion, and extreme environment resistance. They serve as the core optical components for infrared thermal imagers, pyrometers, and remote sensing equipment.
Typical Application Scenarios
▫️ Military/Security: Lenses for thermal imagers, objectives for night vision devices, and drone reconnaissance payloads—penetrate smoke/darkness to accurately capture target thermal signals.
▫️ Industrial Inspection: High-precision infrared temperature measurement lenses and equipment thermal fault diagnostic tools—enable non-contact temperature testing for scenarios ranging from -40℃ to 1500℃.
▫️ Aerospace/R&D: Satellite infrared sensor windows and astronomical telescope germanium lenses—withstand space radiation and stably receive cosmic thermal radiation.
▫️ Firefighting/Rescue: Thermal imaging search-and-rescue lenses—locate trapped personnel in dense smoke.
Key Technical Parameters
| Indicator Item | Parameter Value | Description |
|---|---|---|
| Transmission Bandwidth | 2-16μm (customizable narrow bands available) | Covers mainstream mid-wave/long-wave IR applications |
| Transmittance | >90% (uncoated); >95% (with AR coating) | Reduces energy loss & improves SNR |
| Refractive Index | ~4.0 (@10μm) | Supports high-numerical-aperture designs |
| Temperature Resistance | -200℃ to 400℃ | Adapts to extreme thermal cycling |
| Surface Roughness | <1nm (pre-coating) | Minimizes scattering for sharp imaging |
| Dimensional Tolerance | ±0.01mm (customizable) | Matches high-precision assembly requirements |
Item & Component
- Item (Product Type): Flat lenses, spherical lenses, aspheric lenses (optional); Standard diameters: Φ10mm–Φ200mm.
- Component (Core Composition):
▶ Substrate: High-purity germanium single crystal (7N grade, dislocation density <100/cm²).
▶ Coatings: Optional anti-reflection (ZnS/Ge multilayer) or protective (SiC/diamond-like carbon) coatings for scratch/corrosion resistance.
Control (Quality Assurance)
▫️ Raw Materials: Every batch of germanium single crystal undergoes XRD and full-band infrared transmittance testing.
▫️ Processing: Ultra-precision turning/polishing (sub-micron accuracy) in a Class 1000 cleanroom.
▫️ Finished Products: 100% inspection for transmittance, surface defects, and surface figure error (PV < λ/10, λ=632.8nm).
Choosing germanium infrared lenses isn’t just selecting a material—it’s investing in an all-weather, high-reliability infrared vision solution.
👉 For custom requirements (special bands/sizes/coatings), inquire today—we respond within 48 hours.