Custom Size
1PC Prototype
CNC Machining
UV‑IR AR Coating
High Pressure Resistant
OEM/ODM
Custom Sapphire Window
High‑Strength Single‑Crystal Sapphire Optical Viewport
Custom sapphire optical window manufactured according to your drawing, optical specification and application requirements. Precision CNC machining, ultra‑precision polishing, custom optical coatings for aerospace, deep‑sea ROV, industrial kiln and medical optical systems.
- 1‑Piece Low MOQ Prototype Support
- Free Engineering Review Before Production
- Custom CNC Machining & Complex Special‑Shaping
- UV / Vis / IR Custom AR Anti‑Reflection Coatings
- High Hardness, Pressure & Thermal Shock Resistance
- Custom Edge Finishing, Drilling & Cutouts
- Full‑Scale OEM / ODM Mass Production
Engineering Commitment: Send your drawing, dimensions or sample requirements. Our optical engineers will review your project and recommend suitable sapphire configuration for free.
Is Your Current Sapphire Component Supplier Causing These Problems?
| ❌ Pain Points With Other Suppliers |
✅ Felix Glass Solution |
| Standard sapphire blanks cannot match your custom geometry |
Off‑the‑shelf sapphire cannot satisfy your unique outline, holes, cutouts and edge requirements. We produce fully custom sapphire windows strictly following your CAD drawings and optical specifications. |
| Poor surface quality leads to optical signal loss |
Our ultra‑precision polishing delivers controlled scratch‑dig surface quality, minimizing scattering and ensuring stable optical transmission for your system. |
| Cannot withstand high‑pressure or high‑temperature working environment |
Single‑crystal sapphire provides outstanding hardness, pressure resistance and thermal‑shock performance. We control crystal orientation and processing to match your harsh‑environment requirements. |
| Unoptimized transmission for UV or infrared working band |
Bare sapphire brings unwanted surface reflection. Custom AR anti‑reflection coatings optimize transmittance for your target spectral range from UV to mid‑IR. |
| Multiple outsourced vendors cause inconsistent quality & long lead‑time |
Many suppliers outsource crystal growth, polishing and coating separately. Our in‑house full‑line manufacturing avoids cross‑vendor quality deviation and delivery delays. |
| High MOQ barriers for early‑stage engineering validation |
Lots of sapphire manufacturers require large minimum order quantity. We support 1‑piece prototype testing for system verification before mass‑volume orders and reduce project risk. |
| Lack of formal metrology inspection documentation for aerospace‑grade projects |
We provide dimension report, surface quality inspection and spectral test documentation upon request, supporting traceability for aerospace, defence and industrial optical projects. |
Why Global OEM Buyers Work With Felix Glass
In‑House
Sapphire Full‑Line Manufacturing
±0.01 mm*
Precision CNC & Polishing Capability
1 Piece
Prototype Support
3‑4 Weeks*
Typical Prototype Lead Time
6‑10 Weeks*
Typical Production Lead Time
Full Metrology
Optical Inspection Reports Available
*Actual tolerance, lead time depend on crystal orientation, geometry, coating complexity and quantity.
Sapphire Optics Manufacturing Capability Felix Glass integrates sapphire crystal growth, CNC machining, grinding, ultra‑precision polishing, optical coating and metrology inspection in‑house. We control every critical stage from sapphire ingot to finished optical components, supporting custom windows, lenses, domes, rods and complex sapphire parts for industrial, medical and aerospace projects.
Sapphire Window Engineered For Your Application
🛰️ Aerospace EO / IR Systems
Custom sapphire optical windows for airborne optoelectronic, infrared imaging and space‑related optical assemblies.
- Broad UV‑Mid IR transmission
- High mechanical & thermal stability
- Strict surface quality requirements
- Traceable inspection documentation
Recommended Solution: Custom‑oriented sapphire substrate + Ultra‑precision polishing + Target‑band AR coating
Discuss Your Aerospace Requirement →
🌊 Deep‑Sea ROV / AUV
High‑pressure resistant sapphire viewports for underwater detection, subsea camera and marine observation equipment.
- Excellent pressure‑bearing performance
- Corrosion resistance for seawater environment
- Custom thickness & contour geometry
- Anti‑reflection coating for underwater imaging
Recommended Solution: High‑strength sapphire blank + CNC shaping + AR coating for underwater spectral band
Request Underwater Sapphire Window →
🔥 Industrial High‑Temperature Kiln
Sapphire observation windows for furnace monitoring, high‑temperature visual inspection and thermal measurement equipment.
- Outstanding thermal‑shock resistance
- Stable performance under long‑term high temperature
- Custom shape and mounting profile
- IR transmission for thermal monitoring
Recommended Solution: Custom sapphire window, precision edge finishing, no‑coating or IR‑band AR coating
Discuss Your Kiln Sapphire Project →
Core Technical Specifications
| Base Material |
Single‑Crystal Sapphire Al₂O₃ |
| Crystal Orientation |
C‑axis / A‑axis / R‑axis, custom |
| Custom Shape |
Circular, square, rectangular, special‑shaped |
| Thickness Range |
0.2 mm‑50 mm, custom |
| Thickness Tolerance |
±0.01 mm ~ ±0.1 mm typical* |
| Surface Quality |
10‑5, 20‑10, 40‑20 scratch‑dig |
| Transmission Band |
190 nm‑5.5 μm |
| Available Coatings |
Uncoated / Custom UV‑Vis‑IR AR anti‑reflection coating |
| Prototype MOQ |
1 piece |
| Prototype Lead‑time |
3‑4 weeks* |
| Mass Production Lead‑time |
6‑10 weeks* |
*Subject to crystal orientation, geometry, coating complexity and quantity.
Typical Custom Sapphire Window Project Examples
Deep‑Sea ROV Sapphire Viewport Project
Customer Requirement
Custom round thick sapphire window, high pressure resistance, AR coating for underwater visible imaging, for remotely operated underwater vehicle camera housing.
Our Solution
Selected matched‑orientation sapphire blank, precision CNC machining, ultra‑precision polishing, target‑band AR anti‑reflection coating and full dimensional & surface inspection.
Typical Project Outcome
Prototype passed pressure and optical performance verification, approved for subsequent batch production.
Aerospace EO/IR Sapphire Optical Window Project
Customer Requirement
Custom special‑shaped sapphire window, strict scratch‑dig specification, mid‑infrared AR coating, full inspection documentation for airborne optoelectronic equipment.
Our Solution
Controlled crystal orientation, ultra‑precision polishing, multi‑layer IR AR coating, complete metrology test report delivered together with samples.
Typical Project Outcome
Custom samples delivered on schedule, passed customer optical evaluation and accepted for mass‑order follow‑up.
From CAD Drawing to Finished Custom Sapphire Window
01 Engineering Drawing Review
Verify drawing dimensions, tolerance, crystal orientation, surface quality, coating requirements and application environment to formulate custom production plan.
02 Sapphire Ingot & Crystal Orientation Selection
Select proper sapphire ingot with target crystal orientation matching your mechanical and optical performance requirements.
03 Raw Sapphire Blank Slicing
Precision slicing from sapphire ingot to get initial blank thickness for subsequent processing.
04 Custom CNC Machining
Complete custom contour, holes, cutouts, mounting steps and special‑shaped edge processing according to CAD files.
05 Grinding & Ultra‑Precision Polishing
Control thickness, flatness and surface scratch‑dig grade to meet strict optical component standards.
06 Optical Functional Coating
Deposit custom AR anti‑reflection coatings for UV, visible or infrared spectral bands as required.
07 Strict Multi‑Dimensional Metrology Inspection
Dimensional measurement, surface defect inspection, spectral transmittance test and coating quality verification.
08 Export‑Standard Protective Packaging & Shipment
Special anti‑collision packaging for optical components to reduce damage risk during international logistics.
Why Start With a 1‑Piece Sapphire Prototype?
01 Verify Mechanical Design
Confirm custom dimension, assembly fit, mounting profile and edge geometry to avoid costly mistakes in mass‑production batches.
02 Evaluate Optical Performance
Test actual transmittance, surface quality and coating effect under your real‑world system working conditions.
03 Reduce Overall Project Risk
Validate crystal orientation, mechanical strength and optical indicators with low‑volume prototype before committing to large orders.
Not Sure Which Optical Material You Need?
| Your Requirement |
Recommended Optical Material Solution |
| Extreme hardness & high pressure resistance |
Single‑Crystal Sapphire Window |
| Broad transmission from UV to mid‑IR |
Sapphire substrate + custom band AR coating |
| Excellent thermal‑shock resistance for high‑temperature environment |
Custom‑oriented sapphire optical window |
| Underwater ROV / AUV observation application |
High‑strength sapphire window + visible‑band AR coating |
| Lower cost for near‑IR & UV without extreme mechanical load |
Fused Silica optical window |
| Visible‑band general‑purpose optical component |
BK7 / K9 optical glass window |
| Early‑stage engineering performance validation |
1‑piece custom sapphire prototype |
| Need formal inspection & metrology test reports |
Sapphire window with full‑set inspection documentation |
Still confused about your project configuration? Ask Our Engineers for Free Guidance
Related Custom Sapphire Optical Products
Fused Silica Optical Window
Frequently Asked Questions Before Ordering
Q: Can you produce custom sapphire window according to my CAD drawing?
A: Yes. We support custom dimension, thickness, holes, cutouts, special contour and specified crystal orientation based on your STEP, IGES, DXF or PDF engineering drawings.
Q: Can I order only 1 piece for engineering prototype testing?
A: Yes. We support low‑quantity prototype production, 1‑piece sample is available for performance validation subject to part complexity.
Q: What crystal orientations of sapphire can you supply?
A: C‑axis, A‑axis, R‑axis and other custom orientations are available. Our engineers will suggest suitable orientation according to your mechanical‑optical requirements.
Q: Can you provide custom AR anti‑reflection coatings for UV / Vis / IR band?
A: Yes. Single‑band or multi‑band AR coatings can be customized to match your target working spectral range.
Q: What surface quality grades can you achieve for sapphire window?
A: We can deliver 10‑5, 20‑10, 40‑20 scratch‑dig surface quality for different‑grade optical projects.
Q: Can you deliver metrology inspection test reports?
A: Yes, dimension measurement, surface quality and spectral transmittance inspection reports can be provided upon request for aerospace and high‑end industrial projects.
Q: What information do I need to prepare to get quotation?
A: Please provide drawing or dimension parameters, crystal orientation requirement, thickness, surface quality, coating specification and quantity. If partial specs are not finalized, send available information for preliminary evaluation.
Q: What if I am not sure about crystal orientation or coating configuration?
A: No problem. Just tell us your application environment, working spectrum and mechanical load requirements. Our optical engineers will recommend proper sapphire configuration for you free of charge.
Request a Custom Sapphire Window Quote
Tell us your technical requirements. Our optical engineers will review your project and provide suitable manufacturing solution and quotation.
Have a Custom Sapphire Window Project? Let’s Review It.
Send your CAD drawing, dimension parameters or preliminary requirements. You don’t need all specifications finalized. Our optical engineering team will provide professional custom‑manufacturing solutions for your project.
Free engineering review · 1‑piece prototype support · OEM/ODM manufacturing
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