| Brand Name |
HLL |
| Place of Origin |
Jiangsu China (Mainland) |
optical lenses Plano convex lenses,Plano concave lenses,Bi-convex lenses,Bi-concave lenses,meniscus lenses,achromatics lenses. Specifications: Material: Bk7, Quartz, Caf2, crystal Diameter: 5 to 300mm Diameter tolerance: 0.01 to 0.1mm Edge thickness: 1mm +/- 0.10mm Focal length: 0.1% to 2% Surface quantity: 80/50 to 20/10 Centration: 1 to 3Arc minutes Fringes: 1 to 5