ROHS Rectangular Sapphire Crystal Lenses Al2O3 Sapphire Optical Window
Optical Sapphire Rectangular Windows Fine GrindingSapphire Rectangular Windows, Rectangular Windows for industrial use
Why choose the sapphire?
1-Thinner and Stronger than Standard Glass Windows
2-Transmits Wavelengths Ranging From UV to Mid-Infrared
3-Features Extreme Surface Hardness and Chemical Resistance
Sapphire Windows are manufactured from single crystal sapphire, making them ideal for demanding applications (such as laser systems) because of their extreme surface hardness, high thermal conductivity, high dielectric constant and resistance to common chemical acids and alkalis. Sapphire is the second hardest crystal next to diamonds and, because of their structural strength, sapphire windows can be made much thinner than other common dielectric windows with improved transmittance. Chemically, sapphire is single crystal aluminum oxide (Al2O3), and is useful in a transmission range from 0.2 - 5.5µm
What is sapphire?
Synthetic Sapphire is a single crystal form of corundum, Al2O3, also known as alpha-alumina, and single crystal Al2O3,have 9.0 hardness.
Sapphire is aluminium oxide in the purest form with no porosity or grain boundaries, making it theoretically dense.
The combination of favourable chemical, electrical, mechanical,optical, surface, thermal, and durability properties make sapphire a preferred material for high performance system and component designs. For various semiconductor applications,
sapphire is the best choice in comparison with other synthetic single-crystals.
| Product name | industrial sapphire wafer |
| sapphire optical lens chemical formula | AL2O3 |
| Crystal structure | Hexagonal |
| Hardness Mohs | 9H |
| Compressvise strength | Gpa 2.0 |
| Density(20℃) | 3.98g/cm |
| Fusion point | 2040℃ |
| Boiling point | 2980℃ |
| Coefficient of Thermal Expansion | α=5.8×10 -6 /K |
| Specific heat | 0.418W.s/g/k |
| Thermal conduction | 25.12W/m/k(@100°C) |
| Optical transmission range | 0.17-5.5μm |
| Transmission(0.3~5um) | 85-88% |
| Refractive index | no=1.768nd |
| ne=1.76nd | |
| dn/dt | 13×10-6/K(@633nm) |
| Permittivity | 11.5(//c), 9.3(⊥c) |
Processing capacity
| Material | Sapphire (Al2O3) |
| Abbe Number (vd) |
72.24 |
| Axis Orientation | Random |
| Birefringence (no-ne) | 0.008 for Visible Light Orthogonal to Optical Axis |
| Clear Aperture (%) | ≥90 |
| Coefficient of Thermal Expansion CTE (10-6/°C) | 8.8 |
| Density (g/cm3) | 3.97 |
| Index of Refraction nd | 1.77 |
| Knoop Hardness (kg/mm2) | 1900 |
| Parallelism (arcmin) | ≤3.5 |
| Surface Flatness | 2λ (typical) |
| Surface Quality | 80-50 |
| Surface Roughness (μm) | 0.1 per Inch |
| Young's Modulus (GPa) | 435 |
Specifications
| Attribute | Commercial Quality | Precision Quality | Ultra-Precision Quality |
| Size (round and square) |
Ø from 10 to 300 mm
from 10 to 210 mm
|
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| Size tolerance | ± 0.2 mm | ± 0.1 mm | ± 0.05 mm |
| Thickness | From 0.2 to 200 mm | ||
| Thickness tolerance | ± 0.1 mm | ± 0.1 mm | ± 0.05 mm |
| Parallelism | < 5 arc minutes | < 1 arc minutes | < 20 arc seconds |
| Surface accuracy (PV) | 5 λ (546 nm) | λ /2 (546 nm) | λ/10 (546 nm) |
| Surface quality (scratch & dig) | According to MIL 80 - 50 | According to MIL 40 - 20 | According to MIL 20 – 10 |
| Surface roughness (Rq) | < 5 nm | < 1 nm | < 0.5 nm |
| AR coating | Custom-designed | ||
| Order quantity | Depending on customer specifications. Please contact us. | ||
| Delivery time (weeks) | 6 - 10 weeks, assuming raw materials are available. | ||
Packing Details :Use Good and Strong Cartons to pack
We offer more transportation options
FAQ
Q: What are your main products?
A: Optical lens,mirrors,windows,filters,prisms
Q: How long is your delivery time?
A: In general delivery time is about one month for custom produced optics.except stock ones or some special optics.
Q: Do you provide samples ? is it free or extra ?
A: We can provide free samples if we have stock optics as your request,while custom produced samples are not free.
Q:What is your MOQ ?
MOQ is 10pcs for most of the optics, while MOQ could be only one piece if you need a element in big dimention.
Q: What is your terms of payment ?
T/T,L/C,VISA,Paypal,Alipay or Negotiation.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.