Specification for lenses
Material: BK7 ( Or Fused Silica)
Design Wavelength: 546.1nm
Design Index: 1.5183 ±0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length:±2%
CentCenter tolerance:lambda/4@632.8nm
Surface Quality: 60-40 scratch and dig
Bevel: 0.25 mm x 45°
Focal: from 15mm to 1000mm
Diameter: 3 mm to 200mm

Specifications for Cylindrical Lenses
Material: BK7 grade A optical glass
Design Wavelength: 632.8 nm,
Design Index: n=1.5147
Surface Figure: x:lambda/2; y: l2lambda
Dimension Tolerance: 0.2mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Quality: 60-40 scratch and dig