7.Optical Dome Diameter Tolerance & Surface Specs | Subsea Dome
FELIX GLASS SUBSEA DOME FAQ
Optical Dome Diameter Tolerance & Surface Specifications
Precision dimensional and optical surface specifications directly affect assembly fit, sealing performance and imaging quality for subsea dome ports.
Diameter Tolerance
Standard diameter tolerance range for our domes (20mm–60mm): ±0.02mm. Tighter tolerance down to ±0.005mm can be customized upon request for high-precision sensor applications.
Optical Surface Quality
- Standard scratch & dig: 60/40
- High precision option: 40/20 for high-end camera and LiDAR systems
Surface Figure
Default surface figure: λ/2 @632.8nm. λ/4 or λ/8 is available as upgrade for high-performance optical systems.
Key Notes
Flanged domes require extra flatness control on flange sealing face to guarantee uniform O-ring compression and prevent water leakage.
FAQ
Q: What is your default diameter tolerance?
A: ±0.02mm for 20–60mm dome diameter. Tighter tolerance can be customized.
Q: What scratch-dig grade do you offer?
A: Standard 60/40, upgraded 40/20 for premium optical systems.
Q: Does flange face have flatness requirement?
A: Yes, flange flatness is critical for sealing. We can control flatness per your drawing requirement.
Q: Can you provide inspection report for dimensions?
A: Yes, dimensional inspection report can be supplied with shipment.
CTA: Share your tolerance and optical surface requirements for quotation.
Related Subsea Dome Products
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Flanged Optical Dome Port | Integrated One-Piece Flange Subsea Dome
Submit Your Tolerance & Optical Surface Requirements
Share your tolerance and optical surface requirements for quotation.
Send Your Optical SpecRelated reading: Standard Dome vs Integrated Flanged Dome Port
Related reading: Subsea Optical Dome Port Lead Time & MOQ
Related reading: Hydrostatic Pressure Test for Subsea Dome Port
Related reading: What material is best for subsea optical dome port?
Related FAQ: Subsea Optical Dome Port FAQ Library

- 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.
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