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

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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Focus on the research and development and manufacturing of high-quality optical lens glass/display panel glass/glass products!

✔ROHS CE certified ISO9001:2005 quality management system
✔Professional team over 19 years’ experience under Japanese management system
✔Help over 2000+ companies to make prototypes into mass production successfully
✔Challenge the 100% on time delivery goal 100% full inspection report
✔Cost-down solutions for over 2000+ companies with success
✔Free solutions provided based on different industries
✔Support free samples (quick sample production) Small quantity (100-1000pcs) available

WhatsApp: +86 189 9805 2888
WeChat: +86 185 6503 2888
URL: www.felixglass.com

james@felixglass.com: +86 185 6503 2888

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