Single-Crystal Sapphire
Selected for scratch resistance, stable optical protection and long service in demanding environments.
✔ OEM / ODM Customization
✔ Free Drawing DFM Technical Review
✔ 24-Hour Professional Quotation
✔ Flexible Low MOQ & Fast Prototypes






Felix Glass Co., Limited manufactures OEM custom single-crystal sapphire spherical covers for optical systems that need a hard, clear and dimensionally controlled protective dome. custom size, sapphire optical dome engineering, optional coating, prototype support, tight drawing review and production for underwater, aerospace, laser, imaging and machine vision equipment. A sapphire optical dome is used when the optical path needs protection from abrasion, pressure, outdoor exposure, cleaning, heat or chemical contact while still allowing imaging or sensing through a curved cover. The dome can be reviewed around diameter, wall thickness, radius, edge finish, coating and inspection method so the part fits the housing instead of forcing the equipment design around a standard catalog item. Selected for scratch resistance, stable optical protection and long service in demanding environments. Diameter, curvature, thickness and edge details can be matched to customer drawings. Dimensional, surface, coating and optical checks can be aligned with the project requirement. The primary material is synthetic single-crystal sapphire. BK7 or K9 optical glass can still be discussed as a secondary option when the project requires optical glass but does not need sapphire hardness. The correct dome design depends on the optical path, housing seal, cleaning method, working pressure, target wavelength and expected service environment. Sapphire can help protect imaging modules where pressure, corrosion, cleaning and optical clarity must be considered together. Drawing-based domes support compact sensor housings, laser modules and optical covers with defined inspection needs. For machine vision and inspection systems, sapphire helps reduce wear on exposed protective covers. Small changes in wall thickness, edge finish or spherical radius can affect assembly fit, sealing pressure and optical performance. For US buyers comparing custom suppliers, the useful question is not only whether sapphire can be made, but whether the drawing can be reviewed against machining, polishing, coating and inspection limits. Felix Glass can review the drawing, application environment and target quantity before confirming the production route, helping purchasing teams avoid unclear specifications and repeated sample changes. Outer diameter, radius, thickness, optical zone, coating and assembly edge are checked first. Sapphire blank size, machining allowance and inspection requirements are planned for the project. Diamond tooling is used to form the curved profile and prepare the part for optical polishing. Surface quality and optional AR, AG or AF coating are reviewed by optical and service needs. Dimensions, surface condition, coating appearance and packing protection are checked before shipment. The dome faces abrasion, repeated cleaning, marine exposure, outdoor service, heat, pressure or a long-use protective role. The assembly needs an optical dome shape but the service conditions do not require sapphire hardness or chemical resistance. AR, AG and AF choices should be tied to wavelength band, lighting environment, cleaning method and visible reflection target. Yes. Diameter, radius, thickness, edge finish, coating and inspection points can be reviewed from the drawing before quotation. Prototype sampling can be discussed for custom projects so engineering teams can verify fit and optical performance before larger orders. Share the wavelength range, reflection target, cleaning condition and application environment so AR, AG, AF or another coating route can be reviewed. Send the drawing, material request, diameter, radius, wall thickness, tolerance, coating, quantity, use environment and inspection requirement. For a useful quotation, provide the dome drawing, material choice, coating target, quantity, inspection notes and application environment. The Felix Glass team can review feasibility and production details for your custom sapphire optical component project.Custom Sapphire Optical Dome for Drawing-Based Optical Protection
What This OEM Sapphire Spherical Cover Is Built For
Single-Crystal Sapphire
Custom Geometry
Inspection Focus
Material and Coating Options for Sapphire Optical Components
Typical Technical Specifications for Custom Sapphire Domes
Product type OEM custom sapphire optical dome, spherical cover or hemispherical dome Model reference FG-GENERAL-OPTICAL-DOME-001 Material options Synthetic single-crystal sapphire; BK7/K9 optical glass available as a secondary custom option Custom items Diameter, wall thickness, curvature, edge finish, coating and optical surface requirement Optical surface grade Project review up to lambda/10 precision polishing standard when suitable for the design Dimensional tolerance Project review up to +/-0.01 mm according to drawing, structure and inspection method Diameter range Custom 10-350 mm outer diameter depending on geometry and material feasibility Common applications Underwater optical systems, laser equipment, aerospace sensors, industrial imaging and machine vision Where Custom Sapphire Spherical Covers Are Used

Underwater and ROV Systems

Aerospace and Laser Equipment

Industrial Imaging
Why Drawing-Based Manufacturing Matters for Optical Domes
OEM Sapphire Optical Dome Manufacturing Workflow
Drawing Review
Material Planning
CNC Forming
Polishing and Coating
Final Inspection
When to Choose Sapphire Instead of BK7 or K9 Optical Glass
Choose Sapphire When
Review BK7 or K9 When
Confirm Coating Early
Related Sapphire Optical Dome Products for Comparison
Questions Before Ordering a Custom Sapphire Optical Dome
Can the dome be made from a customer drawing?
Is one-piece prototype sampling available?
Which coating should be selected?
What information helps quotation accuracy?
Send Your Sapphire Dome Drawing for Practical RFQ Review
Send us your drawing, dimension & coating requirements for fast quotation within 24 hours.
Get Free RFQWe supply Industrial Glass, Sapphire Optics, Optical Lenses/Prisms/Filters, Infrared IR Optics, Functional & Display Glass, N-BK7/H-K9L Optical Glass, supporting OEM mass production and laboratory custom prototypes. Flexible MOQ & free sample service available. Fill in the form to download full datasheets and get factory wholesale price within 24 hours.

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.
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.
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.
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.
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.