Calcium Fluoride (CaF₂) Windows – High Transmission Optics

Precision Custom CaF₂ Windows for UV, Visible, and IR Applications

At Bote Optical, we manufacture high-quality Calcium Fluoride (CaF₂) windows for a wide range of optical applications. Known for their excellent transmission from deep UV to infrared, CaF₂ optics are widely used in spectroscopy, laser systems, and imaging instruments. We offer custom sizes, coatings, and shapes to meet your unique project requirements.

What is Calcium Fluoride?

Calcium Fluoride (CaF₂) is a naturally occurring crystalline material used as an optical window. It offers broadband transmission from 130 nm in the UV up to 10 μm in the infrared, making it highly versatile across industries.

The material is non-hygroscopic, chemically stable, and has a low refractive index, which minimizes the need for anti-reflective coatings in many cases.

Key Properties of Calcium Fluoride

CaF₂ is ideal for high-performance systems requiring low dispersion and high transmission.

Calcium Fluoride Benefits

• Wide Wavelength Range: UV to IR (130 nm – 10 μm)
• Low Refractive Index: Reduced reflection, often no coating needed
• High Laser Damage Threshold: Ideal for excimer laser applications
• Chemically Stable & Durable
• Low Dispersion: Excellent for lenses and imaging optics

These benefits make Calcium Fluoride an excellent choice for both scientific and industrial use.

Transmission of Calcium Fluoride Windows

Calcium Fluoride windows exhibit high transmission over a wide spectral range. In the UV range (180–300 nm), it transmits over 90%, and in the IR up to 8 μm, it maintains excellent clarity.

Transmission Spectrum Example

Typical transmission curve of uncoated CaF₂ material

Custom coatings such as AR (anti-reflection) for specific bands (e.g., 193 nm, 532 nm, 1064 nm) can further optimize performance.

Applications

CaF₂ windows are widely used in:

• UV and IR spectroscopy
• Excimer and CO₂ laser systems
• Astronomical optics
• Cryogenic and vacuum UV instruments
• Semiconductor photolithography
• Medical and dental lasers

Custom Calcium Fluoride Windows

At Bote, we provide custom-made CaF₂ windows based on your specifications:

✅ Diameter: 5mm to 100mm+
✅ Thickness: From 1mm up
✅ Shape: Round, square, or custom geometries
✅ Surface Quality: Up to 10-5 scratch-dig (MIL-PRF-13830B)
✅ Coatings: UV AR, IR AR, dual-band AR, or custom multilayer
✅ Edge finishing, beveling, mounting options available

We support both prototype orders and mass production. Let us know your required specs—we’ll make it happen.

Why Choose Bote?

As a trusted precision optics manufacturer based in Singapore, we combine high-quality craftsmanship with customer-first service.

✔ 15+ years of experience in optical manufacturing
✔ Responsive technical support
✔ Competitive pricing for custom parts
✔ Fast global delivery
✔ ISO-compliant processes

Request a Quote or Technical Support

Need a customized Calcium Fluoride window for your next project?
Contact us today—we respond within 24 hours.

📩 Email: [email protected]
🌐 Website: www.bote.com.sg

Keywords included: calcium fluoride windows, what is calcium fluoride, calcium fluoride benefits