High-Precision Germanium Lenses for Infrared Imaging
At Bote Optics, we specialize in the design and manufacturing of Germanium lenses, ideal for infrared (IR) applications such as thermal imaging, spectroscopy, security, and industrial sensing. As an optical component manufacturer based in Singapore and China, we provide tailored optical solutions with fast lead times and international shipping capabilities.
Germanium (Ge) is a top-tier infrared lens material thanks to its high refractive index and excellent transmission in the 8–14 μm wavelength range, making it a preferred choice in thermal imaging systems.
Why Choose Germanium as an Infrared Reflective Material?
| Property | Germanium |
|---|---|
| Transmission Range | 2–16 μm (Optimized for 8–14 μm) |
| Refractive Index (10μm) | ~4.0 |
| Emissivity (uncoated) | ~0.46 |
| Hardness (Knoop) | 780 |
| Density | 5.33 g/cm³ |
| Thermal Expansion | 6.1 x 10⁻⁶ /°C |
Germanium’s low emissivity and high refractive index enable compact lens designs with minimal signal loss, ideal for long-wave infrared (LWIR) systems and uncooled thermal cameras.
Germanium Infrared Lens Applications
- Thermal Imaging Cameras (e.g., firefighting, night vision, drones)
- Infrared Surveillance Systems
- Gas Detection & Industrial Monitoring
- Infrared Thermometers and Sensors
- Medical Thermal Diagnostics
- Defense and Military Targeting Systems
Whether you’re building a compact handheld thermal imager or an industrial thermal monitoring device, Germanium lenses offer reliable, high-contrast imaging in harsh conditions.
Custom Germanium Lens Capabilities at Bote
At Bote Optics, we offer fully customized Germanium optics, including:
- Plano-convex, aspheric, and meniscus lenses
- DLC (Diamond-Like Carbon) or AR (Anti-Reflection) coatings
- Precision diamond turning and polishing
- Germanium lens protectors for rugged environments
Coating Options:
| Coating Type | Function |
|---|---|
| DLC Coating | Scratch-resistant and moisture-proof |
| BBAR Coating | Enhanced transmission, reduced reflectance |
| AR Coating (3–5 μm) | Optimized for MWIR systems |
| AR Coating (8–12 μm) | Optimized for LWIR systems |
We control every stage of production — from raw material procurement to final inspection and packaging — ensuring reliable quality and competitive Germanium lens prices.
Germanium Lens Protectors
To extend the life of your imaging equipment, we offer Germanium lens protectors with DLC coatings for high-durability in dusty, wet, or high-impact environments. Ideal for automotive sensors, drones, and military devices.
Germanium Lens Price & Custom Orders
The price of a Germanium lens varies based on specifications such as:
- Diameter and focal length
- Surface finish and coating requirements
- Tolerance and shape (plano, aspheric, etc.)
- Quantity (prototype or bulk)
Contact our team at [email protected] for a fast quotation or use our online inquiry form for a custom design tailored to your project.
✅ Note: Unlike suppliers from restricted countries, Bote can legally export Germanium lenses from Singapore with no additional export controls under most conditions.
Infrared Lens Material Comparison Table
| Material | Transmission Range (μm) | Refractive Index (10 μm) | Durability | Common Use |
|---|---|---|---|---|
| Germanium | 2–16 | ~4.0 | Medium | Thermal Imaging |
| Zinc Selenide | 0.5–20 | ~2.4 | Soft | CO₂ Laser Optics |
| Silicon | 1.2–7 | ~3.4 | High | MWIR Imaging |
| Sapphire | 0.15–5.5 | ~1.7 | Very High | Windows & Domes |
FAQs About Germanium Lenses
Q1: What is the emissivity of a Germanium lens?
A: Uncoated Germanium has an emissivity of ~0.46. Coatings like DLC can reduce emissivity and improve performance in high-temperature or outdoor environments.
Q2: Can I use Germanium lenses in thermal cameras?
A: Yes, Germanium is the industry standard for thermal imaging, especially in the 8–12 μm LWIR band.
Q3: Are Germanium lenses fragile?
A: Germanium is brittle and sensitive to thermal shock, but with DLC or AR coatings, lenses can be protected from scratches and environmental damage.
Q4: What’s the typical lead time for a custom Germanium lens?
A: Standard lead time is 2–4 weeks, depending on complexity and coating requirements.
Why Choose Bote for Germanium Lenses?
- 🛠️ In-house design & production in China, with final QC & export from Singapore
- 🌍 Global delivery with competitive pricing and short lead times
- 📏 Fully customized optics from prototype to volume production
- ✅ Export-friendly under Singapore trade regulations
Explore our full range of Infrared Optics or reach out for a free consultation.
- Inspection Equipment List and Metrology of Bote Optics
- Introduction of BOTE Key Equipment
- Catalog of Precision Optics
- Catalog of Imaging Optics
- ISO9001-2015 Certified
Get a Quote Today
Optimize your IR systems with high-performance Germanium lenses — precision-crafted, durable, and fully customizable.
👉 Contact Us Now or email us at [email protected] to discuss your optical project.