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Home / All / A Complete Guide to Optical Glass Domes & ZnS Infrared Windows

A Complete Guide to Optical Glass Domes & ZnS Infrared Windows

Apr 22,2026
In precision optical engineering, high-performance optical components determine the stability and efficiency of optical equipment. As a professional manufacturer of custom optical elements, we focus on optical glass domes and infrared optical windows, providing reliable optical solutions for underwater surveillance, security cameras, laser systems and infrared detection equipment around the world.
 
Optical Glass Domes: The Core Protective Optical Component
 
Optical glass domes are hemispherical optical parts made of high-quality optical glass materials, mainly including BK7/K9 glass, fused silica, high borosilicate glass and other high-transmittance materials. They are widely used in underwater cameras, marine monitoring equipment, CCTV security systems and aerospace optical devices.
 
Our optical glass domes support diversified customized designs: edge-free plain domes, flat-bottom domes and flanged domes, which can meet different installation needs. With precision polishing technology and professional anti-reflection (AR) coating, our domes feature ultra-high light transmittance, low optical distortion, high pressure resistance and waterproof performance, adapting to harsh underwater, outdoor and high-pressure working environments.
 
Key Optical Glass Dome Types & Applications
 
- BK7/K9 Glass Domes: Ideal for CCTV surveillance cameras, general optical imaging, with high light transmittance and low cost.
- Fused Silica Domes: High temperature resistance, low thermal expansion, perfect for underwater ROV and deep-sea monitoring.
- Borosilicate Glass Domes: Good balance of strength and transparency, suitable for industrial optical detectors.
 
ZnS Infrared Windows: Professional for 10.6μm Infrared Applications
 
ZnS (Zinc Sulfide) infrared windows are key optical components for infrared optical systems, specially designed for 10.6μm wavelength infrared laser and thermal imaging equipment. Made of high-purity zinc sulfide crystal materials, they have excellent infrared light transmittance and stable optical performance.
 
We provide customized ZnS infrared windows with anti-reflection coating, which effectively reduce light reflection loss, improve the sensitivity and accuracy of infrared detection and laser systems. They are widely used in industrial infrared detectors, thermal imaging cameras, laser optical equipment and military optical systems, supporting customized sizes and precision tolerance processing.
 
Why ZnS for 10.6μm Infrared Systems?
 
- High transmittance in 10.6μm infrared band, meeting CO2 laser and thermal imaging needs.
- Hard and durable crystal structure, suitable for harsh industrial and outdoor environments.
- Customizable AR coating, reducing surface reflection loss by over 95%.
 
Why Choose Our Custom Optical Components?
 
1. Material Selection
 
We provide a full range of optical material options, from conventional optical glass to infrared crystal materials, to meet the needs of different optical application scenarios.
 
2. Customized Processing
 
Support OEM & ODM customized services, adjustable size, shape, coating and tolerance, suitable for mass production and small-batch customized R&D.
 
3. High Precision Quality
 
Strict quality control in each production process, ensuring ultra-high surface accuracy, low distortion and stable optical performance.
 
4. Wide Application Coverage
 
Products are widely used in underwater monitoring, security surveillance, industrial optics, laser equipment and infrared thermal imaging fields, exported to global markets.
 
Final Thoughts
 
Whether you need standard optical glass domes or custom ZnS infrared windows, we always provide high-quality, high-precision optical components and professional after-sales service. As a reliable optical component supplier, we are committed to helping global customers optimize optical system performance and achieve business growth.
 
If you have customized needs for optical elements, please feel free to contact us, and we will provide you with a professional optical solution!

James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory.James Fu, Sales Director of FELIX OPTICAL GLASS, and a poster displaying contact information for an optical glass deep-processing factory. 2
Learn more from our FAQ
What is the minimum order quantity for custom precision optical glass components?

FELIX OPTICAL GLASS offers highly flexible MOQs to support customer projects, including prototype testing, small-batch trial orders, and high-volume production. All products can be fully customized to your drawings, tolerances, and application standards. Please send us your specifications, and we will reply within 1-5 hours and provide an accurate quotation after careful evaluation within 1-2 days.

Can I get free glass samples for testing before bulk order?

Yes, our FELIX GLASS factory supports sample testing for a wide range of precision optical glass components and assemblies. The lead time for sample production is 3 to 7 working days. Please contact us today to arrange samples and obtain a customized solution that meets your needs.

What is the production lead time for custom optical glass components?

A: The production cycle for standard samples is 3-10 working days, while mass production requires 15-35 working days, depending on the complexity of the product and the order quantity. We provide reliable precision optical glass components and fast delivery services for orders from industries such as defense, industrial equipment, medical devices, shipbuilding, robotics, automotive, and aerospace. Please submit your project details so we can provide you with an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?

All precision optical glass components from FELIX OPTICAL GLASS comply with ISO quality system standards as well as CE and RoHS requirements. We provide comprehensive test reports, spectral graphs, material certificates, and inspection documents for customer review. Please feel free to request complete certification details and a formal quotation at any time.

Do you offer one-stop custom optical glass processing services?

Yes. We offer a full range of precision optical glass component processing services, including CNC machining, precision grinding, optical polishing, chemical/physical tempering, vacuum coating (AR anti-reflective coating, AF anti-fingerprint coating, AG anti-glare coating, IR infrared coating), and screen printing. From raw materials to finished products, every step is completed in our own factory. Please tell us your needs, and we will provide you with the most cost-effective solution.

CONTACT US NOW FOR A QUOTE
We will respond promptly within 1 to 5 hours and provide an optimal, formal quotation within 1 to 2 days. Partnering with us is the smartest choice—start a mutually beneficial partnership today!
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With 19 years of experience as a precision optical glass expert, we provide comprehensive and satisfactory customized solutions.

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