How do you ensure optical glass quality?

Update Time:2026/6/6

A:

We build a full-process closed-loop quality control system covering raw material incoming inspection, in-process production monitoring, finished-product testing and pre-shipment recheck to guarantee consistent quality for BK7, fused silica, sapphire, ZnSe, ZnS, AR/AG/AF coated display cover glass and all custom precision optical components, complying with international industrial optical inspection standards for aerospace, medical, automotive sensor, laser and machine vision industries.

Before production, our QC team strictly audits incoming optical blank materials by checking internal bubble, impurity, raw material spectral transmittance and material uniformity, eliminating defective substrates to avoid hidden quality risks from the source. During production, every core working procedure including CNC machining, fine grinding, ultra-precision optical polishing and vacuum optical coating is tracked with real-time process inspection. Technicians spot-check dimensional tolerance, edge integrity and surface finish after each working step, timely correcting abnormal processing parameters to prevent batch defective goods.

After finishing polishing and functional coating, finished optical glass undergoes comprehensive laboratory testing with professional optical testing equipment. Key inspected items include surface scratch grade, flatness, parallelism, spectral transmittance, coating adhesion and anti-fingerprint performance for AF-coated products. High-spec parts for aerospace and infrared systems will receive extra environmental reliability tests such as temperature shock and humidity resistance to verify long-term stability under harsh working conditions.

Prior to packaging and global shipment, our final QC re-inspects appearance and specification one by one again. Any unqualified optical glass will be separated and reworked instead of being delivered. Our systematic multi-stage quality management effectively stabilizes product yield, minimizes defect rate and delivers reliable certified optical glass to worldwide OEM and ODM purchasers.

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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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How do you ensure optical glass quality?

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.