|Material:||Sapphire Crystal, Sapphire||Usage:||Watch Lens|
|Product Name:||Optical Sapphire Glass Products||Surface Quality:||40/20|
|Diameter:||1-200.0 Mm||Name:||Optical Collimator Lens|
|Coating:||Anti-Reflective (AR) Coatings||Color:||Transparent Clear|
sapphire glass watch face,
scratch proof watch glass
Bridge Type Flat Sapphire Crystal Glass Scratch Resistant 1-200 mm Dia
AR blue coated ,On the bottom of the glass
Genuine quality sapphire glass
Hardness level is 9, just next to diamond
Smooth edge treatment, no scratches
The surface is smooth
High temperature resistant, scratch-proof, wear-resistant
1, please allow 0.01-0.2 mm error due to manual measurement.
2. The color may be slightly different due to different display methods. Please understand.
3. please avoid violent impact
Rectangle circular optical glass sapphire crystal glass window sapphire crystal glass for the watch, camera, IR window etc.
hese round sapphire glass crystals come in a variety of thicknesses and diameters, are nearly unbreakable crystals making them highly prized by watchmakers. These watch crystals can be glued into most watch cases or pressure fit into most plastic watch crystal gaskets. Each sapphire watch crystal comes with a slightly polished bevel edge to give the watch crystal a nice finished look once it has been installed. These generic sapphire glass crystals can be used to replace the watch crystals of almost every name brand watch popular today, especially high-end watch crystals like those in Rolex watches, saving you both time and money.
Synthetic Sapphire Window Technique Index :
|Edge Finish||Ground and beveled|
|Surface Quality||40-20 scratch-dig|
|Surface Flatness||λ/4 @ 633 nm|
|Parallelism||≤3 arc min (≤0.9 mrad)|
|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|