Hardness
Mohs 9Supports exposed windows that may face abrasion or repeated cleaning.
Custom Sapphire Window Manufacturer
group nameSapphire Optical Windows
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Min Order1 bag
brand nameFELIX GLASS optical glass Manufacturing base
payment methodT/T, L/C, D/P D/A, MoneyGram, Credit Card, PayPal, Westem Union, Cash, Escrow
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update timeFri, 17 Jul 2026 21:49:56 GMT
Paramtents
Material Optical-grade single-crystal sapphire
Crystal Orientation C-plane, A-plane, R-plane by review
Dimension Round, square, rectangular or drawing-based
Tolerance Drawing-dependent; critical dimensions reviewed
Surface Quality Commercial to optical scratch-dig specification
Surface Flatness Project-specific at agreed test wavelength
Transmission Band Typical uncoated material range: approx. 0.2-5.5 um
Coating Uncoated, AR, BBAR or custom by review
MOQ Prototype and batch quantities reviewed
Lead Time Quoted after drawing and process review
Packging & Delivery
Min Order1 bag
Briefing
Custom sapphire optical windows made to drawing for EO/IR, sensors, underwater vision and precision instruments.
Detailed
Custom sapphire window manufacturer
Drawing-Based Sapphire Windows for Demanding Optical Systems
Felix Glass Co., Limited manufactures custom sapphire optical windows for teams that need controlled geometry, optical surface quality, durable exposed surfaces and documented inspection requirements. Projects are reviewed against the working wavelength, crystal orientation, sealing design, environment and purchasing specification before quotation.
Round, square, rectangular and drawing-based shapes
C-plane, A-plane and R-plane options by review
Prototype and repeat-batch manufacturing support
Request an Engineering Review
Direct answer
What Does a Custom Sapphire Window Manufacturer Supply?
A custom sapphire window manufacturer converts single-crystal aluminum oxide blanks into polished protective or transmissive optical components made to a buyer's drawing. The manufacturing route can include orientation review, blank preparation, CNC shaping, grinding, optical polishing, edge treatment, coating and inspection. Sapphire is commonly evaluated where abrasion resistance, thermal stability and transmission from ultraviolet through infrared wavelengths are important.
Technical data
Custom Sapphire Window Specification Guide
The entries below are quotation inputs, not universal guaranteed values. Final capability and acceptance criteria are confirmed from the drawing, application and inspection plan.
| Specification Field | Available Direction | RFQ Note |
|---|---|---|
| Material | Optical-grade single-crystal sapphire (Al2O3) | State optical, thermal and environmental requirements. |
| Crystal Orientation | C-plane, A-plane, R-plane or drawing-defined orientation | Specify orientation and optic-axis requirements when critical. |
| Dimension | Round, square, rectangular, stepped, slotted or custom outline | Provide a controlled drawing with units and datums. |
| Tolerance | Commercial to precision dimensional control by feasibility review | Identify critical dimensions separately from general tolerances. |
| Surface Quality | Commercial polish to optical scratch-dig requirements | State the applicable standard and clear aperture. |
| Surface Flatness | Project-specific flatness measured at the agreed wavelength | Define aperture, test wavelength and measurement condition. |
| Transmission Band | Typical uncoated sapphire material range is approximately 0.2-5.5 micrometers | Actual transmission depends on thickness, orientation, finish and coating. |
| Coating | Uncoated, AR or BBAR; other functional coatings by review | Provide wavelength band, angle of incidence and environment. |
| MOQ | Prototype and batch quantities reviewed by geometry and process | Include annual demand and release quantity when available. |
| Lead Time | Quoted after drawing, quantity, material, coating and inspection review | Identify sample and production milestones in the RFQ. |
Material properties
Why Engineers Evaluate Sapphire for Optical Windows
Sapphire is anisotropic and birefringent, so orientation and optical path should be considered alongside mechanical durability. Values and behavior can vary with temperature, wavelength and measurement direction.
Density
Approximately 3.98 g/cm3Useful for mass and mounting calculations during component design.
Optical Behavior
Birefringent crystalOrientation can matter in polarization-sensitive optical paths.
Thermal Behavior
Anisotropic and temperature-dependentThermal gradients, mounting stress and sealing design require system-level review.
Application fit
Application and Selection Table
| Application | Buyer Priority | Specification Focus | Typical Buyer Role |
|---|---|---|---|
| EO/IR sensor protection | Transmission plus exposed-surface durability | Band, incidence angle, flatness, coating and environmental sealing | Optical Engineer, R&D Manager |
| Underwater and machine vision | Image quality in a sealed assembly | Pressure design, aperture, coating, edge condition and housing interface | Optical Engineer, Equipment Purchasing Manager |
| High-temperature sensing | Thermal stability and optical access | Temperature cycle, mounting method, thickness and surface finish | R&D Manager, Procurement Director |
| Precision instruments | Repeatable geometry and inspection records | Datums, tolerances, scratch-dig, flatness and documentation | Optical Engineer, Procurement Director |
| Laser or imaging assemblies | Wavefront and reflection control | Wavelength, power density, flatness, parallelism and coating | Optical Engineer, R&D Manager |
Manufacturing process
From Drawing Review to Protected Packing
- 01Requirement review — Confirm revision, material, orientation, geometry, quantity and critical acceptance points.
- 02Blank planning — Select blank form and machining allowance around the approved route.
- 03Shaping and grinding — Generate the outline, thickness and edge geometry with diamond tooling.
- 04Optical polishing — Develop the specified faces, clear aperture and cosmetic quality.
- 05Coating when specified — Apply an approved coating design for the stated band and environment.
- 06Inspection and packing — Verify agreed characteristics and separate polished parts for shipment.
Quality inspection
Inspection Is Matched to the Critical Features
The quality plan should measure what affects system performance rather than apply the same test depth to every order. Drawing revision and acceptance methods are aligned before production.
Dimensional and datum verification
Surface quality and edge review
Flatness or parallelism when specified
Coating region and visual uniformity
Part identification and protected packing
Factory capability and E-E-A-T
Supplier Evidence Buyers Can Request
Felix Glass Co., Limited supports drawing-based optical component projects through cutting, CNC grinding, polishing, optional coating coordination, inspection planning and protected packaging. Buyers should request the documents relevant to their own compliance and validation process.
Engineering Review
Manufacturability feedback can cover geometry, tolerances, orientation, coating inputs and inspection feasibility.
Quality Documentation
Inspection scope and reporting requirements can be defined before quotation and purchase-order release.
Certification Support
ISO 9001 quality-system information and applicable RoHS or REACH material documentation can be requested for review.
Prototype to Batch
Sample and repeat-order planning can be discussed according to geometry, tooling, quantity and validation needs.
Engineering resources
Request the Factory Brochure and CAD RFQ Template
Verified public download URLs were not available at preparation time. Use the request links below to obtain the current controlled files instead of relying on an outdated copy.
Solution pathways
Continue the Engineering Review
Engineering FAQ
Custom Sapphire Window Buyer Questions
What information is required for a custom sapphire window quotation?
Provide the controlled drawing, dimensions, tolerances, quantity, crystal orientation, scratch-dig, flatness, clear aperture, wavelength, coating, environment and required inspection records.
Which sapphire crystal orientation should an optical engineer specify?
The choice depends on the optical path, polarization sensitivity, thermal design and machining geometry. C-plane is common, but A-plane or R-plane may be appropriate when the system design requires a different axis relationship.
Can sapphire windows be made in non-round shapes?
Square, rectangular, stepped, slotted and other drawing-based outlines can be reviewed. Feasibility depends on size, thickness, corner geometry, tolerance and edge requirements.
How should surface quality be stated on the drawing?
Identify the scratch-dig requirement, applicable standard, clear aperture, cosmetic zones and whether coated and uncoated surfaces use different acceptance criteria.
What must be specified for sapphire window flatness?
State the flatness value, test wavelength, clear aperture, support condition and whether the requirement applies before or after coating.
Can AR or BBAR coatings be applied to sapphire?
Coating feasibility can be reviewed for the wavelength band, angle of incidence, polarization, environment and durability requirement. Include the coated side and clear-aperture definition.
Is sapphire always better than fused silica or BK7?
No. Sapphire offers high hardness and useful thermal durability, while fused silica or BK7 may be better for other wavelength, wavefront, cost or fabrication priorities. Material selection should follow the complete system requirement.
How are sapphire windows inspected before shipment?
The inspection plan may include dimensions, edge condition, surface quality, flatness, parallelism, coating appearance and identification. The exact methods and records should be agreed before production.
Can a prototype be ordered before batch production?
Prototype planning can be discussed based on material availability, geometry, tooling, coating and inspection scope. State the sample quantity and validation plan in the RFQ.
What affects lead time for a custom sapphire window?
Blank availability, orientation, geometry, polishing difficulty, coating schedule, inspection depth, quantity and drawing revision status all affect the quoted schedule.
Action
Submit Sapphire Window RFQ
Send the Drawing for a Manufacturability and RFQ Review
Include the buyer role, application, drawing revision, annual demand, first-order quantity, wavelength, operating environment and the characteristics that are critical to system performance.
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