�� Specifications:
�� Material: BK7 grade A, fine annealed optical glass
�� Index of Refraction: 1.5183+/-0005
�� Design Wavelength: 546.1 nm
�� Dimension Tolerance: +0.0, -0.2 mm
�� Clear Aperture: >80%
�� Angle: ��=79.5��+/-0.5�� ��=60��+/-1��
�� Flatness: ��/10 @632.8 nm
�� Surface Quality: 20-10 scratch and dig