Fused Silica Double-Concave Lenses
Specification:
Material: BK7 Grade A Optical Glass
Design Wavelength: 546.1nm
Design Index: 1.46008±0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Figure: lambda/4 at 632.8nm
Surface Quality: 60-40 scratch and dig
Protective Bevel