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What quality control standards do you follow for optical glass products?

Update Time:2026/4/28

At Felix Glass, we follow strict quality control standards for all BK7 and K9 optical glass products to ensure consistent quality and reliable performance for our customers. Our quality control process covers every stage of production, from raw material inspection to final product testing.

Our quality control standards are based on international specifications, including ISO and DIN standards for optical glass. Before production, all raw materials are inspected for optical and physical properties, including refractive index, dispersion, transmittance, and chemical composition, to ensure they meet the required specifications.

During production, we conduct in-process inspections to monitor dimensional accuracy, surface quality, and processing consistency. This includes checking the size, shape, and flatness of the parts using precision measuring equipment such as coordinate measuring machines (CMM) and interferometers. We also inspect the surface finish of the parts to ensure they are free from scratches, pits, and other defects that could affect optical performance.

After processing, all optical glass parts undergo a comprehensive final inspection, including dimensional verification, surface quality inspection, and optical performance testing. For coated parts, we also test the coating thickness, uniformity, adhesion, and transmittance/reflectance to ensure they meet the specified requirements.

Our optical performance testing includes measuring the visible light transmittance, refractive index, and dispersion of the parts using spectrophotometers and refractometers. We also test the parts for resistance to environmental factors such as temperature and humidity to ensure they maintain their performance under different conditions.

All our quality control processes are documented, and we provide detailed inspection reports with each order, including test results and specifications verification. This gives our customers full visibility into the quality of their products and ensures they meet the required standards.

At Felix Glass, we are committed to delivering high-quality optical glass parts that meet or exceed our customers' expectations. Our strict quality control standards ensure that every product we manufacture is reliable, consistent, and fit for purpose. If you have specific quality requirements for your project, please contact our team for more information.

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Learn more from our FAQ

What is your MOQ for custom optical glass and display glass parts?: Felix Glass offers highly flexible MOQ to support client projects, including prototype testing, small batch trial orders and large-volume mass production. All products can be fully customized according to your drawings, tolerances and application standards. Send us your specs to get an accurate price quote within 24 hours.

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?: What is the production lead time for custom optical glass components?
Answer: The lead time for standard samples is 3–7 business days, while mass production takes 15–25 business days, depending on product complexity and order volume. We provide reliable, rapid delivery for orders serving the industrial, medical, automotive, and aerospace sectors. Please submit your project details to receive an accurate delivery schedule.

Are your optical glass products ISO, CE and RoHS certified?: All FELIX GLASS precision optical glass components comply with ISO quality system standards, as well as CE and RoHS requirements. We provide comprehensive test reports, material certificates, and inspection documentation for customer review. Please feel free to request full certification details and a formal quotation today.

Do you offer one-stop custom optical glass processing services?: Yes. We provide a full range of in-house processing services, including CNC machining, precision grinding, optical polishing, vacuum coating (AR, AF, AG, IR), tempering, and screen printing. Every step—from raw material to finished product—is carried out within our own facility. Please let us know your requirements, and we will provide you with the most cost-effective solution.

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What quality control standards do you follow for optical glass products?

A specialist in precision optical glass with 19 years of experience, providing comprehensive, satisfying custom solutions.

A specialist in precision optical glass with 19 years of experience, providing comprehensive, satisfying custom solutions.