Big Size High Transparency Square Sapphire Optical Window With
Vertical Angle
Sapphire has a melting point of 2040 degrees C, Mohs (Mohs)
hardness scale of up to 9, refractive index of 1.76 to 1.78.
Without impurities, sapphire can be a superior optical window
material because it is clear and transparent throughout the visible
light range, even as far away as ultraviolet and infrared light.
With such characteristics, it's no wonder sapphire has ever been a
precious gem. These same properties also make sapphire attractive
for non-precious applications, and today's state-of-the-art
synthetic crystal growth and processing technologies are driving
the increasing demand for this material.
The window is a flat plate with two parallel or wedge-shaped
surfaces, and is usually used as a protective window for electronic
sensors or external environment detectors. The window does not
change the magnification of the system. Substrate materials include
various sapphire, optical glass, K9, ultraviolet fused silica,
infrared fused silica, and calcium fluoride (CaF2), magnesium
fluoride (MgF2), zinc selenide (ZnSe), germanium (Ge), silicon (Si)
And other crystal materials, and provide various optical coatings
such as anti-reflection coatings, high-reflection coatings,
spectroscopic coatings, and metal coatings. Broadband
antireflection coatings can be used in the ultraviolet, visible,
near-infrared and mid-infrared bands.
Single crystal sapphire windows are very suitable for demanding
applications (such as laser systems) because of their extremely
high surface hardness, high thermal conductivity, high dielectric
constant, and resistance to chemical acids and alkalis. Since the
hardness of sapphire is second only to diamond, and its structural
strength is very high, the thickness of the sapphire window made by
enhanced light transmittance is thinner than that of the general
high-dielectric window. In terms of chemistry, sapphire is a single
crystal of aluminum oxide (Al2O3), which is very suitable for
transmission between 0.2 and 5.5 μm. In general optical
applications, the basic needs of customers can be met without
coating. Our products can also be coated, silk-screened or special
heat treated according to customer needs to meet the special needs
of customers.
Product shapes are divided into: round, rectangular, stepped and
various machinable shapes.
The product size range is: diameter (maximum diagonal) 10-500mm,
thickness 0.3-100mm.
Product finish after polishing: 80/50, 60/40, 40/20, 20/10, 10/5
optional (US military standard).
Surface flatness (surface type): up to 1/10λ.
| Property | Specifications |
| Thickness | 0.5-200mm |
| Size Tolerance | ±0.01 |
| Edge Finish | Ground and beveled |
| Surface Quality | 40-20 scratch-dig |
| Surface Flatness | λ/4@633nm |
| Parallelism | ≤3 arc min(≤0.9mrad) |
| Clear Aperture | ＞80% of central diameter |
| Hardness(Knoop) | 1370 kg/mm2 |
| Young's modulus | 3.4*1011N/m2 |
| Thermal Limit | 22W/m/K |
| Thermal expansion coefficient | 8.4*10-6/K |
Why US?
1. We’re the rare source manufacturer of color sapphire boule, and
the most professional factory of sapphire processing, especially
the special watch case.
2. We have our own sapphire grown equipent with CZ and KY method.
3. Professional customized production according to the drawing
provided by clients.
4. Precision work of sapphire processing and polishing.
5. Experienced technicians and skilled workers.
FQA
1. Are you a trading company or factory?
We are a professional factory of sapphire products, also a trading
company .
2.Can you do customized products?
Yes, we specialized in customized production or OEM work.
CAD,3D drawing are needed.
3.Could you provide samples?
Yes, we could provide samples with a charge, but if you place the
order with a quality above 100pcs, the sample charge will be
refunded.
4.What’s the delivery time?
It depends on the type of products and the quality.
For watch case, the regular time is around 5-8 weeks for 200pcs
according to the difficulty of the processing.
5.How about the payment?
T/T payment is prefered.
6.How about the delivery?
Mostly by air, like DHL, Fedex.
