Material: BK7 or UV fused silica
Design Wavelength: 546.1nm
Design Index:
  BK7: 1.5183 ± 0.0005
  Fused silica: 1.46008 ± 0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Irregularity: l/4@632.8nm
Surface Quality: 60-40 scratch and dig
Protective Bevel