Mohs 9 Sapphire Surface
Single-crystal sapphire resists scratches better than standard optical glass, helping marine camera covers keep a clean viewing surface through repeated field use.
✔ OEM / ODM Customization
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✔ 24-Hour Professional Quotation
✔ Flexible Low MOQ & Fast Prototypes






Hong Kong Felix Glass Co., Limited | Custom sapphire optics manufacturer
This sapphire underwater optical dome is built for marine cameras, ROV vision modules, offshore monitoring equipment, and optical systems that need a hard protective cover without sacrificing image clarity. Single-crystal sapphire gives the dome Mohs 9 surface hardness, strong scratch resistance, stable optical transmission, and reliable performance in wet, high-pressure environments.
Ordinary protective glass can reduce transmission, introduce distortion, and wear quickly when exposed to sand, saltwater, cleaning cycles, or mechanical contact. This custom sapphire optical dome is designed to protect the camera window while helping the imaging path stay clear, stable, and repeatable. For projects that require a different budget or optical material, BK7 and K9 optical glass can also be reviewed as secondary custom options.
Single-crystal sapphire resists scratches better than standard optical glass, helping marine camera covers keep a clean viewing surface through repeated field use.
Precision shaping and polishing help control aberration so the dome can support underwater observation, machine vision, and sensor protection.
The dome geometry and material stability make it suitable for camera housings, marine optical covers, and sealed optical assemblies.
Sapphire is selected when the dome must combine optical clarity with mechanical durability. It can support visible, UV, and IR related optical designs depending on coating and project requirements, while its high hardness helps reduce surface damage that could scatter light or blur captured images.
| Material | Synthetic single-crystal sapphire; BK7 or K9 optical glass can be discussed as secondary custom options. |
|---|---|
| Coating | AR, IR, UV, and AF coating options according to wavelength, cleaning, and environmental requirements. |
| Diameter | 1 mm to 150 mm, customizable by drawing, sample, housing size, and optical path requirement. |
| Core features | High transmittance, low distortion, scratch resistance, waterproof assembly support, and stable optical protection. |
| Applications | Marine cameras, ROV vision, medical devices, laser systems, industrial optical sensors, and protective optical housings. |
For imaging windows exposed to seawater, pressure, abrasion, and cleaning, sapphire helps protect the camera while supporting a clear optical field.
View deep sea ROV sapphire domeCustom AR coated sapphire domes can support security cameras, inspection systems, and optical sensors that need durable exposed covers.
View AR coated CCTV sapphire domeDrawing based sapphire covers can be produced for optical protection where hardness, cleanliness, coating, and transmission control matter.
Browse custom optical productsFelix Glass reviews dome diameter, height, thickness, tolerance, coating, working medium, and optical path before quotation.
Sapphire material is selected and processed according to project requirements, with optical glass options available for alternative designs.
Polishing focuses on optical surface quality, controlled distortion, and the fit needed for camera or sensor housings.
Each dome is checked for dimensional accuracy, appearance, coating requirement, and order documentation before shipment.
Projects can request AR coating to improve light transmission, IR or UV coating for wavelength related applications, and AF coating to reduce fingerprint or cleaning issues. For housing integration, Felix Glass can discuss custom outside diameter, dome height, wall thickness, edge design, and assembly fit based on your drawing or sample.
For fast evaluation, share the optical drawing, target wavelength, pressure or sealing condition, quantity, and inspection requirements.
Yes. Diameter, dome height, wall thickness, edge detail, and coating can be reviewed from your drawing, sample, or housing requirement.
Sapphire is much harder and more scratch resistant than common optical glass, making it useful for exposed marine, industrial, aerospace, and protective optical covers.
Yes. AR, IR, UV, and AF coating options can be discussed according to wavelength range, transmission target, cleaning method, and operating environment.
Send your dome drawing, material preference, target wavelength, coating request, quantity, and application details. Hong Kong Felix Glass Co., Limited can review custom sapphire protective cover requirements and prepare a practical quotation for marine camera and optical system projects.
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 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.
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?
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.
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.
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.