Sapphire step window,sapphire optical lens ,Al2O3 single crystal
glass ,sapphire optical glass step sapphire plate sapphire optical
windows,
Sapphire window introduce
Single crystal sapphire possesses a unique combination of excellent
optical, physical and chemical properties. The hardest of the oxide
crystals, sapphire retains its high strength at high temperatures,
has good thermal properties and excellent transparency. It is
chemically resistant to common acids and alkali at temperatures up
to 1000 °C as well as to HF below 300 °C . These properties
encourage its wide use in hostile environments where optical
transmission in the range from the vacuum ultraviolet to the near
infrared is required. Sapphire is anisotropic hexagonal crystal.
Its properties depend on crystallographic direction (relative to
the optical C-axis).
Features:
Transmission in 0.3-5.0μm, no absorption in 2-3μm
Extremely hard and durable
High thermal conductivity
High bulk damage threshold
| Materials characteristics compare |
| Item | B270 | CaF2 | Ge | MgF2 | N-BK7 | Sapphire | Si | UV Fused Sillca | ZnSe | ZnS |
| Refractive index(nd) | 1.523 | 1.434 | 1.003 | 1.413 | 1.517 | 1.768 | 3.422 | 1.458 | 2.403 | 2.631 |
| Coeffcient of dispersion(Vd) | 58.5 | 95.1 | N/A | 106.2 | 64.2 | 72.2 | N/A | 67.7 | N/A | N/A |
| Density(g/cm3) | 2.55 | 3.18 | 5.33 | 3.18 | 2.46 | 3.97 | 2.33 | 2.20 | 5.27 | 5.27 |
| TCE(μm/m℃) | 8.2 | 18.85 | 6.1 | 13.7 | 7.1 | 5.3 | 2.55 | 0.55 | 7.1 | 7.6 |
| Soften Temperature(℃) | 533 | 800 | 936 | 1255 | 557 | 2000 | 1500 | 1000 | 250 | 1525 |
| Knoop hardness(kg/mm2) | 542 | 158.3 | 780 | 415 | 610 | 2200 | 1150 | 500 | 120 | 120 |
Commen Specifications:
| Material: | Sapphire |
| Dimension Tolerance: | +0.0, -0.1mm |
| Thickness Tolerance: | ± 0.1mm |
| Surface quality: | 80/50 |
| Clear Aperture: | >85% |
| Flatness: | λper 25mm |
| Parallelism: | 3' |
| Bevel: | <0.25mm X 45° |
| Coating: | Upon requirement |
grade: Sapphire optical
Orientation: C <0001>±1°,
size:57x50mm, width:35x29mm,±0.03mm,
Thickness:5mm±0.02mm
SD:60/40,
Company Introduce
SHANGHAI FAMOUS TRADE CO.,LTD. locates in the city of Shanghai,
Which is the best city of China,
and our factory is founded in Wuxi city in 2014.
We specialize in processing a varity of materials into wafersand
customized lens, substrates and custiomized optical glass
parts.components widely used in electronics, optics,
optoelectronics and many other fields. We also have been working
closely with many domestic and oversea universities, research
institutions and companies, provide customized products and
services for their R&D projects.
It's our vision to maintaining a good relationship of cooperation with our all
customers by our good reputatiaons.
