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What materials do you use for optical glass domes?

Update Time:2026/5/3
At Felix Glass, we manufacture optical glass domes using three primary high-performance materials, each chosen for its unique optical and mechanical properties:

1.  **BK7 / K9 Optical Glass**
    This is our most widely used material for standard optical glass domes. BK7/K9 offers exceptional visible light transmission (over 91% across the visible spectrum), low thermal expansion, and excellent homogeneity. It is ideal for applications such as surveillance cameras, general industrial vision systems, and consumer optics where cost-effectiveness and reliable performance are key. We offer BK7/K9 domes in various grades, including fine annealed options to minimize stress-induced birefringence.

2.  **Synthetic Sapphire**
    Sapphire optical domes are the premium choice for demanding environments. With a Mohs hardness of 9, sapphire is nearly scratch-proof and offers superior resistance to high temperatures, chemicals, and abrasion. It provides excellent transmission from the UV to the IR spectrum, making it perfect for aerospace sensors, underwater cameras, high-temperature industrial systems, and medical equipment where durability is critical.

3.  **Fused Silica (Quartz)**
    Fused silica domes are selected for applications requiring superior UV transmission or extreme thermal stability. They exhibit very low thermal expansion, making them resistant to thermal shock, and offer excellent transmission down to deep UV wavelengths. This material is commonly used in UV imaging systems, high-power laser applications, and high-temperature industrial monitoring equipment.

We don’t just supply materials—our engineering team will help you select the optimal material based on your specific wavelength requirements, operating environment, durability needs, and budget to ensure your optical glass dome performs reliably over its entire lifecycle.
 
Learn more from our FAQ
Can you customize the samples style according to my design requirement?

Of course! We can customize the process according to your needs: shape cutting, AR AG coating, high temperature oven, polishing and tempering, anti-UV ink printing, based on our mature supply system for processing and customization

Can I get a sample with my own logo?

Since customized samples and shipping costs are high for both parties, in order to ensure a win-win situation for both parties and quality assurance, we only provide high-quality samples. But we can also provide existing product renderings and design mold services. Usually, we will first provide product renderings with your LOGO as a reference. Click to learn more about free samples

What is your Production MOQ?

The minimum order quantity for our factory production is flexible and negotiable. Usually the MOQ is 100 pieces, and lower quantity is acceptable for trial order. Please feel free to let us know the quantity you need.

Can I purchase your products in bulk? How is the MOQ?

Yes. Our MOQ is flexible and can be negotiated,Each variety starts at 100-500pcs.

How is the payment?

30% Deposit for order confirmation, 70% balance payment within one day before delivery.

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