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What processing tolerances can you achieve for optical glass parts?

Update Time:2026/4/28

At Felix Glass, we maintain strict processing tolerances for all BK7 and K9 optical glass parts to ensure consistent quality and performance for your applications. Our tolerance standards cover three key areas: dimensional accuracy, surface quality, and optical performance.

For dimensional accuracy, we can achieve a typical tolerance of ±0.01mm for most standard optical glass parts. For high-precision applications, we can provide tighter tolerances down to ±0.005mm, depending on the complexity of the part and the material specifications. Our CNC machining equipment is calibrated regularly to ensure consistent accuracy across all production batches.

In terms of surface quality, we can achieve a surface roughness of up to Ra 0.005μm, which ensures high optical clarity and minimal light scattering. We also control surface flatness, with typical flatness tolerances up to λ/10 at 632.8nm for precision applications. For anti-reflective coated parts, we also ensure coating uniformity and adhesion to meet industry standards.

Optical performance tolerances include transmittance and refractive index consistency. Our BK7 and K9 optical glass parts are tested for visible light transmittance, with typical values above 91% for uncoated parts and above 98% for AR-coated parts. We also ensure consistent refractive index across all batches to avoid variations in optical performance.

All our processing tolerances are verified through rigorous quality control testing, including dimensional inspection with coordinate measuring machines (CMM), surface roughness testing, flatness measurement with interferometers, and optical transmittance testing with spectrophotometers. This comprehensive quality control process ensures that every optical glass part we produce meets the required specifications.

If you have specific tolerance requirements for your project, please contact us with your detailed specifications, and our engineering team will confirm our capabilities and provide you with a customized solution.

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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.

✔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
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URL: www.felixglass.com

james@felixglass.com: +86 185 6503 2888

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