|Lens Type||Ball lenses, half-ball lenses||Materials||Optical grade single crystal sapphire, ruby|
|Diameter Range||0.5mm～100mm||Diameter Tolerance||±0.02mm|
|Surface Roughness||0.1μm||Surface Quality||Option: 80/50, 60/40, 40/20 or 20/10 S/D|
|Coating||according to customer's requirement|
Physical and Optical Properties:
|Transmission Range||0.17-5.5μm||Refractive Index||No 1.75449; Ne firstname.lastname@example.orgμm|
|Reflection Lossemail@example.comμm||Absorption Coefficientfirstname.lastname@example.orgμm|
|Melting Point||2040℃||Thermal Conductivity||27.21 W m-1 K-1 @300K|
|Thermal Expansion||5.6 (para)& 5.0(perp)x10-6/K*||Hardness||Knoop 2000 with 2000g indenter|
|Specific Heat Capacity||763 J Kg-1 K-1 @293K||Dielectric Constant||11.5 (para) 9.4 (perp)@ 1MHz|
|Youngs Modules||335Gpa||Shear Modules||148.1GPa|
|Bulk Modules||240GPa||Elastic Coefficients||C11=496 C12=164 C13=115 C33=498 C44=148|
|Apparent Elastic Limit||300 MPa (45000 Psi)||Poisson Ratio||0.25|
|Solubility||98x10-6g/100g water||Molecular Weight||101.96|
Sapphire and Ruby ball and half-ball (hemispherical) lenses feature a very short back focal length with the convenience of a flat surface for easy mounting. Sapphire features a high index of refraction and excellent broadband transmission characteristics. Ruby half-ball lenses are easier to see and therefore easier to handle for physical applications. The lenses are very chemically stable and are great for severe environments, high temperature applications, and applications requiring high melting points.
Hangzhou Shalom EO offers stocked and custom sapphire ball lenses and half ball lenses with diameter range of 0.5mm to 100mm, our ball lenses are widely used in applicatiions of fiber communication, endoscopy, microscopy, optical pick-up devices, and laser measurement systems.