What is an MgF₂ Window?
Magnesium Fluoride (MgF₂) windows are transparent optical components used to protect sensitive instruments or optical paths while maintaining excellent transmission from deep ultraviolet (DUV) to infrared (IR). Known for their high durability, low refractive index, and broad spectral performance, MgF₂ windows are widely used in laser systems, UV spectroscopy, space optics, and high-vacuum environments.
At Bote Singapore, we specialize in custom-made MgF₂ optical windows, combining precision fabrication from our Nanjing factory with the efficient international shipping and customer service from our Singapore office.
Key Features of MgF₂ Windows from Bote
| Attribute | Specification |
|---|---|
| Material | High Purity Magnesium Fluoride (MgF₂) |
| Transmission Range | 120 nm to 8 µm |
| Refractive Index | ~1.38 at 550 nm |
| Surface Quality | 20-10 scratch-dig or better |
| Surface Flatness | λ/10 @ 633 nm |
| Diameter Tolerance | ±0.1 mm (customizable) |
| Thickness Tolerance | ±0.1 mm or tighter |
| Bevel | Protective bevel or as requested |
| Coating Options | Uncoated, V-Coating, BBAR for UV, VIS, or IR |
Why Choose MgF₂ Windows from Bote?
✅ Outstanding Optical Performance
MgF₂ windows offer superior UV transmission (down to 120 nm) and stable IR performance (up to 8 µm), making them ideal for multispectral systems.
✅ Durability in Harsh Conditions
With high resistance to thermal shock, mechanical stress, and chemical attack, MgF₂ windows are perfect for use in space, vacuum chambers, and high-power laser setups.
✅ Custom Solutions
Need a unique shape or coating? We provide fully customized fabrication services – from square to elliptical windows, wedged or wedgeless, and with AR coatings optimized for your wavelength.
✅ Singapore-Based Global Shipping
All exports are handled via our Singapore office, enabling faster shipping, legal global compliance, and trusted international support.
Applications of MgF₂ Optical Windows
- UV & VUV Spectroscopy Systems
- Excimer Lasers and UV Lasers
- IR Thermal Imaging Systems
- Astronomy and Space Optics
- Plasma Monitoring Equipment
- Vacuum Chambers and Beam Splitters
- Medical and Biomedical Devices
Standard MgF₂ Window Specifications
| Model No. | Diameter (mm) | Thickness (mm) | Surface Quality | Coating |
|---|---|---|---|---|
| BOTE-MGW25 | 25.4 | 2.0 | 20-10 | Uncoated |
| BOTE-MGW50 | 50.8 | 3.0 | 20-10 | AR @ 193 nm |
| BOTE-MGW12 | 12.7 | 1.5 | 40-20 | BBAR 200-1600 nm |
| BOTE-MGW75 | 75.0 | 5.0 | 20-10 | Custom |
Custom sizes and shapes available on request.
Product Image
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Advantages of MgF₂ Compared to Other Materials
| Property | MgF₂ | Fused Silica | Calcium Fluoride (CaF₂) |
|---|---|---|---|
| UV Transmission | ★★★★★ | ★★★★☆ | ★★★★☆ |
| IR Transmission | ★★★★☆ | ★★★☆☆ | ★★★★★ |
| Hardness | High | Moderate | Moderate |
| Refractive Index | ~1.38 | ~1.46 | ~1.43 |
| Thermal Shock Resistance | Excellent | Good | Moderate |
MgF₂ is the preferred material for applications requiring UV-VIS-IR compatibility and environmental robustness.
About Bote – Optical Expertise with Global Vision
Bote Optics offers a full spectrum of optical manufacturing capabilities through our China-based factory (www.njbote.com) and Singapore office (www.bote.com.sg). We serve customers across research institutions, aerospace, biomedical, and defense sectors, with a focus on:
- Cold processing precision
- Custom optics from drawings or specs
- Rapid prototyping & small-volume support
- International shipping compliance
Our Singapore location allows us to legally export restricted materials such as Germanium and ZnSe optics, as well as MgF₂ for global customers facing supply chain restrictions.
FAQs – MgF₂ Window
Q: Can I get AR-coated MgF₂ windows for UV applications?
A: Yes, we provide V-coatings and BBAR coatings optimized for UV wavelengths (e.g., 193 nm, 248 nm). Just share your desired spectrum.
Q: Do MgF₂ windows work in vacuum environments?
A: Absolutely. They are non-hygroscopic and stable in high vacuum and extreme temperature conditions.
Q: What’s the minimum order quantity?
A: We support flexible MOQs, including small-batch prototyping for research or low-volume production.
Q: How fast can you ship?
A: Standard parts ship in 3–5 days. Custom parts ship in 2–4 weeks, via DHL/FedEx/TNT from Singapore.
Q: Can you produce irregular shapes?
A: Yes. Square, elliptical, stepped, wedged, and other complex designs can be fabricated with tight tolerances.
Request a Quote – Let’s Build Optical Excellence Together
Looking for high-performance, reliable MgF₂ windows tailored to your system?
📩 Email: [email protected]
🌐 Website: www.bote.com.sg
📞 Phone: +65-8700 3511
Let Bote support your optical project with precision engineering and responsive service.
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Conclusion
MgF₂ windows are a top choice for applications that require broad spectral transparency, rugged durability, and environmental resistance. With Bote’s expertise in optical manufacturing and Singapore’s efficient global logistics, you gain a reliable partner for sourcing premium MgF₂ optics — from one-off prototypes to mass production.
Inspection Equipment List and Metrology of Bote Optics