�� Specifications:
�� Material: BK7 grade A,optical glass
�� Design Wavelength: 632.8 nm
�� Design Index: n=1.51467 at 632.8nm
�� Diameter Tolerance: +0.0, -0.1mm,
�� Thickness Tolerance: +/-0.2mm
�� Surface Quality: 60-40 scratch and dig
�� Wedge Angle: +/-1 minute
�� Flatness: ��/4 at 632.8 nm
�� Protective Bevel