Core Pain Points We Solve
Separate dome and independent flange structure brings leakage risk under deep sea high pressure environment
Extra sealing components increase assembly complexity and raise long-term equipment failure probability
Mismatched aftermarket flange tolerance leads to poor waterproof and pressure-resistant sealing performance
Few manufacturers support one-piece monolithic dome + integrated flange customized precision manufacturing
Product Key Advantages
One-Piece Monolithic Integrated Structure
Integrated forming of dome body and mounting flange, eliminate assembly gaps, greatly lower fluid leakage risk for underwater and high-pressure equipment.
Precision CNC Flange Machining
Tightly controlled flatness and dimensional tolerance on flange sealing surface, achieve stable long-duration waterproof and pressure-resistant assembly performance.
Diversified Optical Substrate Selection
Available materials: single crystal sapphire, fused silica, BK7, K9, ZnS / ZnSe infrared optical glass, matching visible light, MWIR and LWIR working systems.
Customized Broadband Anti-Reflection Coatings
Support single band AR and dual-band BBAR coating, reduce light loss, improve imaging clarity for all-day surveillance optical equipment.
Optimized For Harsh Marine & Airborne Environment
Excellent salt fog corrosion resistance, pressure resistance and thermal shock stability. Suitable for long-term ROV, offshore platform and UAV outdoor missions.
Full Custom OEM Manufacturing Service
Accept drawings customized development, provide prototype verification and mass production. Tailor-made optical solutions for optical system equipment manufacturers.
Core Material Overview
Flanged optical domes support four major substrate materials, selected based on working spectrum, environmental pressure and corrosion resistance requirements
Single Crystal Sapphire — Mohs 9 extreme hardness, excellent high-pressure resistance and salt-fog corrosion resistance, broadband transmission from UV to mid-IR. The preferred material for deep-sea ROV, offshore and long-term outdoor flanged domes.
BK7 / H-K9L Optical Glass — Cost-effective visible-light substrate with excellent polishing precision. Suitable for shallow-water visible monitoring, shore-based surveillance and indoor industrial flanged domes. Not for MWIR/LWIR or deep-sea long-term immersion.
ZnS / ZnSe Infrared Crystal — High transmittance in MWIR and LWIR bands, essential for thermal imaging flanged domes. ZnS offers better environmental durability; ZnSe provides lower absorption for high-sensitivity thermal cameras.
Fused Silica — Ultra-high transmittance from UV to near-IR with exceptional thermal shock stability. Ideal for near-infrared, laser and high-temperature flanged dome applications.
Full Performance Comparison Table
| Parameter | Sapphire | BK7 / H-K9L | ZnS / ZnSe | Fused Silica |
|---|---|---|---|---|
| Working Spectrum | UV ~ Mid IR | Visible ~ Near IR | MWIR ~ LWIR | UV ~ Near IR |
| Mohs Hardness | 9 | 5.5 | 3–4 | 5.5–6 |
| High Pressure Resistance | Excellent (deep sea) | Good (shallow water) | Medium | Good |
| Salt Fog Corrosion Resistance | Superior | Moderate | Low (ZnSe needs protection) | Good |
| Thermal Shock Stability | Excellent | Moderate | Good | Excellent |
| Cost & Mass Production | High cost | Cost-effective | High cost | Medium cost |
Material Selection Guide (Quick Decision Table)
| Application Scenario | Recommended Material |
|---|---|
| Deep-sea ROV / AUV high-pressure underwater camera | Single Crystal Sapphire |
| Offshore platform long-term salt-fog surveillance | Single Crystal Sapphire |
| Shallow-water visible monitoring / shore camera | BK7 / H-K9L |
| MWIR / LWIR thermal imaging turret | ZnS / ZnSe |
| Near-infrared / laser system dome | Fused Silica |
| UAV airborne visible + IR dual-band EOIR | Sapphire (dual-band BBAR coating) |
Engineering Specification Table
| Parameter Item | Custom Technical Specification |
|---|---|
| Product Type | Flanged Mounted One-Piece Integrated Optical Dome |
| Core Materials | Single Crystal Sapphire, Fused Silica, BK7, K9, ZnS, ZnSe IR Optical Substrate |
| Working Spectrum | Visible Light, MWIR, LWIR Single / Dual-Band Customizable |
| Optical Surface Quality | 20/10, 40/20 MIL ultra-precision industrial grade |
| Custom Coatings | Single-band AR, Dual-band BBAR anti-reflection coating, optional AF coating |
| Sealing Feature | Integrated precision machined mounting flange for direct equipment assembly |
| Processing Feature | Dome forming, flange CNC machining, optical polishing, edge finishing, coating customization |
| Application Scenarios | ROV & AUV underwater cameras, offshore surveillance, UAV EOIR turret, industrial high-pressure monitoring devices |
Coating Solution
Custom anti-reflection coatings matched to substrate material and working spectrum for maximum transmittance
| Coating Type | Wavelength Range | Typical Reflectance | Application |
|---|---|---|---|
| Single-band AR (Visible) | 400–700nm | <0.5% per surface | Visible light monitoring camera |
| Dual-band BBAR (Visible + NIR) | 400–1100nm | <1% per surface | Day-night dual-spectrum surveillance |
| MWIR / LWIR AR | 3–12μm | <1% per surface | Thermal imaging IR dome (ZnS/ZnSe) |
| AF / Hydrophobic Coating | Broadband | — | Outdoor anti-fingerprint, anti-fouling, easy cleaning |
In-House Flanged Optical Dome Manufacturing Capability
All integrated flange optical domes are manufactured in dust-free optical workshops. We complete blank forming, ultra-precision surface polishing, CNC flange machining, customized vacuum coating and full optical parameter testing to meet marine, airborne and industrial surveillance equipment standards.
Typical Application Scenarios
- ROV & AUV deep sea underwater detection and monitoring camera systems
- Offshore platform, coastal marine surveillance monitoring equipment
- UAV airborne EOIR dual-spectrum surveillance turret payloads
- Industrial high-pressure closed vessel optical monitoring windows
- Tactical all-weather day-night surveillance optical camera systems
Our optical engineering team provides one-stop customized solutions, including substrate material selection, broadband coating design, flange dimensional customization and prototype testing. Every flanged optical dome passes strict optical and environmental testing before delivery, guarantee stable service performance under complex working conditions.
Why Choose Our Flanged Mounted Optical Domes
Integrated Dome Design Experience
Rich engineering experience solving sealing problems for one-piece flanged optical components
Full In-House Processing
Complete production chain: forming, CNC flange machining, polishing and vacuum coating
Deep Customization Support
Custom diameter, flange size, thickness and optical coating according to client drawings
Comprehensive Optical Inspection
100% transmittance, surface quality and dimensional tolerance inspection before shipment
International Industrial Standards
Optical parameters comply with global marine and airborne optical equipment specifications
Frequently Asked Questions
Q1: What advantages does one-piece flanged dome have over separate dome + flange assembly?
A: Integrated structure removes assembly gaps, eliminates risk of water leakage and pressure failure, reduces spare parts quantity and shortens equipment assembly time.
Q2: Can you customize broadband AR coating for visible + infrared dual spectrum?
A: Yes. We develop customized BBAR coating to raise light transmittance, suitable for day-night dual band surveillance camera optical systems.
Q3: Which material is recommended for underwater flanged optical dome?
A: Single crystal sapphire is the preferred option, offering excellent scratch resistance and saltwater corrosion resistance for long-term marine operation.
Q4: Can you process non-standard custom flange outline and installation holes?
A: Supported. We perform precision CNC machining based on your technical drawings, customized flange shape, sealing surface and mounting hole layout.
Q5: Are prototype samples available for system testing?
A: Yes. We supply small batch prototype samples for performance verification before formal mass production orders.
Related Custom Precision Optical Domes
Get Custom Flanged Mounted Precision Optical Dome Solution
Submit your spectrum band, working pressure, flange installation dimension and coating specifications. Our optical engineers provide professional customized optical dome solution and formal quotation within 24 hours.
Email: james@felixglass.com | Tel: +86 185 6503 2888 | Hong Kong Felix Optical Glass Co., Limited