Product Name: Center Holed Lens, Drilled Hole Glass Lens Hole in Center Lens Model NO.: lens Coating: Ar or Hr Coating Customized: Customized Certification: RoHS, ISO9001 Lenses Color: Clear Material: Optical Glass Shape: Single-lens Transmittance: >95% Type: Convex Lens Usage: Lighting, Medical, Optical, Photography, Laser Diameter Range: 2.0mm~700.0mm Radius Range: 5.0mm~10000.0mm Scratch & Dig: 80/50~10/5 Fringe: 1~5 Irregularity: Lambda/10~Lambda/2 Centration: 30"~5' Bevel: Protected Edge: Mat Blacked as Required Origin: China HS Code: 9001909090 Product Description FAQ:1)How you make the hole? We can do the hole by water jet or Diamond Drill or Laser.2)How youpromise the centration? The Centration for holed lens usually is difficult to do very good. We will identical glass rod to though the hole when making the centration.3) What is your production capacity? We can make the lens from 1pcs better 10pcs to 10,000 per month.4) What is the material frequently used? N-BK7 (Chinese type H-K9L) UV Fused Silica Optical Glass 5) Do you produce lens by Schott, corning material etc? We suggest better use Chinese equivalent material. We can also use Schott or corning material, but the price will be expensive.