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Custom Multi-Band Sapphire EO/IR Protective Window | UV-LWIR Optical Window for Aerospace
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|---|---|
| Categories | Sapphire Optical Windows |
| Brand | FELIX GLASS optical glass Manufacturing base |
| Model | FG-EOIR-SAP-WIN-001 |
| Material | Single Crystal Sapphire (Al₂O₃) |
| Spectrum Transmission | UV to IR Multi-Band |
| Hardness | Mohs 9 |
| Thermal Property | Excellent Thermal Shock Resistance |
| Surface Grade | Grade 00 Optical Polish |
| Coating | Custom Multi-Band AR Coating |
| Machining | CNC Shaping, Edge Chamfering, Sealing Profiles |
| Application | Aerospace EO/IR, Thermal Imaging & Night Vision System |
| Operating Temp | -60℃ ~ +5000℃ |
| Supply Mode | Prototype Sampling & Mass OEM Production |
| FOB port | SHENGZHEN SHANGHAI GUANGZHOU |
| Terms of Payment | L/C, D/A, D/P, Western Union, T/T |
| Download |  |
Custom single-crystal sapphire EO/IR protective windows engineered to your drawing, crystal orientation and spectral transmission requirements. Precision CNC machining, multi-layer AR coating and military-grade inspection for airborne sensor pods, UAV thermal payloads and ground surveillance systems. Optical Glass Processing Experience Sapphire Surface Hardness Prototype Support Typical Prototype Lead Time Typical Production Lead Time Manufacturing Facility *Actual lead time and production capability depend on crystal orientation, geometry, coating complexity, quantity and project requirements.
One Supplier From Prototype to Qualification to Mass Production. Avoid quality disputes and delivery delays caused by multi-supplier coordination between crystal growers, machining shops and coating houses. We provide integrated control across sapphire boule slicing, CNC machining, precision polishing, multi-layer AR coating and military-standard inspection for your EO/IR protective window projects.
Single-crystal sapphire offers usable transmission from ~0.15 μm (UV) through 5.5 μm (MWIR), with extended LWIR performance depending on thickness and coating. Recommended Solution: C-Plane Sapphire + Custom Multi-Layer BBAR Coating + Precision Polishing Sapphire (Al₂O₃) delivers four properties no other optical material combines simultaneously: extreme hardness, high thermal conductivity, high melting point and chemical inertness. Recommended Solution: A-Plane Sapphire for High Thermal Conductivity + DLC Hard Carbon Overcoat Custom multi-layer dielectric coatings applied via electron-beam evaporation or ion-assisted deposition, optimized for your specific sensor wavelength bands. Recommended Solution: Sapphire + Dual-Band AR + DLC Overcoat for Externally Mounted Pods *Subject to crystal orientation, geometry, coating complexity and quantity. Forward-looking and gimbal-mounted sensor packages on fixed-wing and rotary-wing platforms. Windows must survive combined thermal, pressure and aerodynamic loads while maintaining boresight stability. C-plane sapphire with dual-band AR coating (visible + MWIR), precision polished to λ/4 flatness, edge-step mount profile for gimbal integration. DLC overcoat option for forward-facing positions. Prototype windows passed environmental qualification, approved for follow-on production batch orders. Weight-optimized sapphire windows for small to medium unmanned aerial vehicles. Thin substrate designs (<3 mm) with edge-mount profiles that minimize mass while preserving optical flatness under vibration. Thin-profile sapphire substrate with FEA-optimized thickness-to-diameter ratio, BBAR coating for MWIR thermal band, lightweight edge-ground profile for payload integration. Custom samples delivered on schedule, validated under customer UAV vibration and thermal cycling conditions. Fixed and vehicle-mounted thermal imaging stations for perimeter surveillance, border monitoring and artillery forward observation. Windows sized for wide-field-of-view sensors and specified for continuous outdoor exposure. Large-diameter sapphire window (up to Ø300 mm) with hydrophobic top layer for rain shedding, BBAR coating for multi-band visible+MWIR operation, fine-ground edge for flange mounting. Production windows passed 500-hour salt spray and 10-day humidity testing, approved for continuous outdoor deployment. High-speed aerodynamic windows for infrared homing seekers. Hemispherical and ogive dome geometries manufactured from single-crystal sapphire boules with precision centering and wall thickness uniformity. Sapphire dome precision ground and polished from oriented boule, multi-layer AR coating optimized for seeker MWIR/LWIR band, strict wall thickness uniformity and centering tolerance control. Qualification domes passed thermal shock and aerodynamic heating simulation, approved for low-rate initial production. Professionally verify drawing dimensions, tolerance, crystal orientation, spectral band requirements and coating specifications to formulate customized production plans. Select matched crystal orientation: C-plane (0001) for minimum birefringence, A-plane (11-20) for high thermal conductivity, R-plane (1-102) for specific polarization requirements. Oriented slicing from single-crystal sapphire boule according to customized thickness standards to ensure blank dimensional accuracy and crystal alignment. Complete personalized processing: outer diameter shaping, edge steps, mounting flanges, alignment flats, D-shapes and irregular contour shaping for your housing assembly. Precision control of thickness, flatness and wedge, eliminate subsurface damage from slicing, prepare surface for final polishing. Achieve surface quality from 60-40 to 20-10 per MIL-PRF-13830B and surface flatness from λ/4 to λ/10 @ 633 nm, strict ultrasonic cleaning before coating. High-vacuum electron-beam evaporation or ion-assisted deposition to apply custom BBAR, dual-band or multi-layer dielectric AR coatings, plus optional DLC hard carbon and hydrophobic top layers. Interferometric surface measurement, spectrophotometric transmission scan (0.2–14 μm), surface defect inspection per MIL-PRF-13830B, dimensional verification via CMM or optical profilometer. Protective export-grade packaging with first-article inspection data package to reduce breakage risk during international transportation. Confirm custom dimensions, mounting fit, edge profile and crystal orientation before qualification or production to avoid structural and optical errors. Evaluate multi-band transmission, surface flatness, coating adhesion and environmental durability under your actual sensor operating conditions. Validate all technical indicators with low-cost prototype testing before committing to qualification lots or full-rate production sapphire window orders. Still confused about your project configuration? Ask Our Engineers for Free Guidance Tell us what you need. Our optical engineers will review your requirements and provide a suitable manufacturing solution and quotation. Send your drawing, sample photo, dimensions, crystal orientation or spectral band requirements. You don't need to finalize every specification. Our optical engineering team will provide professional customized manufacturing solutions for your aerospace and defense EO/IR project. Free engineering review · 1-piece prototype support · OEM/ODM manufacturingCustom Sapphire EO/IR Protective Window Manufacturer
Multi-Band UV–LWIR Single Crystal Sapphire Optical Window
Is Your Current Optical Window Supplier Causing These Problems?
Pain Points With Other Suppliers
Felix Glass Solution
Conventional glass only transmits one spectral band, requiring multiple windows for multi-sensor suites
Single-crystal sapphire delivers simultaneous transmission from UV through MWIR and into LWIR, allowing one protective window to serve visible, SWIR and thermal sensors behind a single aperture — reducing system complexity and parallax error.
Low-hardness glass scratches easily from sand, rain and particle impact at airspeed
Sapphire delivers Mohs 9 surface hardness — second only to diamond among optical materials — providing inherent resistance to sand erosion, rain impact and particulate strike without the weight penalty of thicker glass. Optional DLC hard carbon overcoat available for extreme environments.
Optical glass fractures under rapid thermal cycling from high-altitude cold to low-altitude humidity
Sapphire combines high thermal conductivity (~40 W/m·K) with moderate CTE to dissipate thermal gradients rapidly. Our windows survive -60°C to +200°C transitions within 30 seconds without surface degradation or coating delamination.
High reflection loss from uncoated sapphire (n ≈ 1.76, ~14% per surface)
We apply custom-designed multi-layer dielectric AR coatings — BBAR, dual-band or multi-layer stacks — using electron-beam evaporation or ion-assisted deposition, reducing average reflectance below 1.5% per surface across the design band.
Wrong crystal orientation causes birefringence and polarization distortion in precision sensors
Our engineers select C-plane (0001), A-plane (11-20) or R-plane (1-102) orientation based on your sensor's polarization state and thermal management architecture. C-plane minimizes in-plane birefringence for polarization-sensitive systems.
Supplier requires high MOQ, blocking aerospace prototype and qualification programs
We support 1-piece prototype testing for sapphire EO/IR windows, allowing you to verify optical performance, coating durability and assembly fit before committing to qualification or production volumes.
Difficult to find one supplier for precision sapphire machining + multi-layer coating + military-standard inspection
Dongguan Felix Glass Co., Ltd. provides integrated control across crystal orientation selection, CNC machining, precision polishing, multi-layer AR coating and full inspection per MIL-PRF-13830B and MIL-C-48497A standards.
Why Global Aerospace & Defense Buyers Work With Felix Glass
Sapphire Window Engineered for Your EO/IR Application
Multi-Band Optical Transmission
Material & Mechanical Performance
Coating Technology & AR Design
Core Technical Specifications
Parameter
Specification
Material
Single Crystal Sapphire (Al₂O₃)
Crystal Orientation
C-plane (0001) / A-plane (11-20) / R-plane (1-102)
Dimension Range
Ø5 mm – Ø300 mm; custom rectangular & shaped profiles
Thickness Range
0.5 mm – 10 mm, custom thickness available
Surface Quality
60-40 to 20-10 per MIL-PRF-13830B
Surface Flatness
λ/10 to λ/4 @ 633 nm
Clear Aperture
≥ 90% of central diameter
Transmission
≥85% avg. UV–MWIR; ≥82% LWIR (with AR coating)
Coating Option
Custom BBAR, dual-band, multi-layer dielectric AR, DLC, hydrophobic
Operating Temperature
-60°C to +500°C continuous
Edge Processing
Fine ground, polished, beveled edge, or step-mount profile
Prototype MOQ
1 piece
Prototype Lead-time
2–3 weeks*
Mass Production Lead-time
4–6 weeks*
Typical Sapphire EO/IR Window Applications
Airborne EO/IR Turrets & Sensor Pods
Application
Our Solution
Typical Outcome
UAV & Drone Thermal Imaging Payloads
Application
Our Solution
Typical Outcome
Ground-Based Surveillance & Target Acquisition
Application
Our Solution
Typical Outcome
Missile Seeker & Guidance Windows
Application
Our Solution
Typical Outcome
From Sapphire Boule to Finished EO/IR Protective Window
01 Engineering Drawing Review
02 Crystal Orientation Selection
03 Precision Slicing from Sapphire Boule
04 Custom CNC Machining
05 Grinding & Lapping
06 Precision Polishing
07 Multi-Layer AR Coating
08 Strict Multi-Dimensional Inspection
09 Export Standard Packaging & Shipment
Why Start With a 1-Piece Sapphire Window Prototype?
01 Verify the Design
02 Test Optical & Coating Performance
03 Reduce Program Risk
Not Sure Which Sapphire Configuration You Need?
Your Requirement
Recommended Sapphire Solution
General multi-band visible + MWIR EO/IR application
C-Plane (0001) Sapphire + BBAR Coating
Polarization-sensitive sensor system
C-Plane Sapphire for minimum in-plane birefringence
High thermal conductivity / cooled detector heat spreading
A-Plane (11-20) Sapphire Substrate
Discrete visible + MWIR dual-channel sensor
Sapphire + Dual-Band AR Coating
LWIR 8–12 μm thermal imaging
Thin Sapphire Substrate + LWIR-optimized AR (or ZnSe/Ge alternative)
High sand/rain erosion environment (externally mounted pods)
Sapphire + DLC Hard Carbon Overcoat
Outdoor rain shedding / hydrophobic requirement
Sapphire + Hydrophobic Top Layer (≥110° contact angle)
High pressure differential / thick window requirement
FEA-Optimized Thickness + Step-Mount Edge Profile
Custom holes, cutouts & special-shaped outline
Precision CNC Machining before Polishing & Coating
Early-stage R&D / qualification program
1-Piece Custom Sapphire Window Prototype
Related Optical Products & Resources
Sapphire Optical Glass — Material Guide
EO/IR Protective Glass Solutions
Custom Infrared Optical Components
IR Optical Dome
ZnSe Infrared Window
Frequently Asked Questions Before Ordering
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Custom Precision Optical & Glass Components Manufacturer – Felix Glass Co., Limited.
We 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.
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- What is your MOQ for custom optical glass and display glass parts?
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.
- 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?
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.
- Are your optical glass products ISO, CE and RoHS certified?
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.
- Do you offer one-stop custom optical glass processing services?
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.
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