Specifications:
Material: BK7 grade A optical glass
Design Wavelength: 546.1nm
Design Index: 1.5183 ±0.0005
Diameter Tolerance: +0.0, -0.15mm
Paraxial Focal Length: ±2%
Centration: 3 arc minutes
Clear Aperture: >80%
Surface Figure: l/4@632.8nm
Surface Quality: 60-40 scratch and dig
Bevel: 0.25 mm x 45°
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