Material: | Synthetic Sapphire | Shape: | Bridge Type |
---|---|---|---|
Usage: | Adult Wrist Watch And Smart Watch Glass | Coating: | Customized |
Color: | Transparent And Colorless | Tolerance: | Customized |
High Light: | convex sapphire,convex crystal glass |
Wrist-watch and Smartwatch Sapphire Glass
Product Description
Despite the fact that sapphires are blue in colour, a sapphire glass is highly transparent to wavelengths of light between 150 nanometres and 5500 nanometres. This range gives the material a very wide optical transmission band from ultraviolet to near-infrared.
It is worth mentioning that the human eye can only discern wavelengths between 380 nanometres and 750 nanometre. In other words, a sapphire glass passes the most basic requirement of an ideal screen: light should pass through it and an individual should clearly see through it.
Specifications:
Material:----------------------------------------------N-BK7, Fused Silica, N-SF10, Silicon, Ge,CaF2, etc.
Diameter Tolerance:----------------------------+0.0/-0.15mm
Focal Length Tolerance (mm):---------------+/-2%
Centration:-----------------------------------------<3 arc minutes
Clear Aperture:------------------------------------>85%
Surface Figure ----<1.5λ
IRR --------------------------------<λ/4
Surface Quality:-----------------------------------60/40
Protected Bevel:----------------------------------<0.25mmx45deg
Property | Specification |
Thickness | Customized |
Size tolerance | 0.02mm |
Edge Finish | Ground and beveled |
Clear Aperture | >80% of central diameter |
Hardness (Knoop) | 1370 kg mm-2 |
Young's modulus | 3.4 x 1011 N m-2 |
Thermal Limit | 22 W m-1 K-1 |
Thermal expansion coefficient | 8.4 x 10-6 K-1 |