Material: K9 fine annealed optical glass

Dimensional error: +0.0/-0.2mm

Beam deflection angle: see specification table

Surface shape: wavelength/2 @ 632.8nm

Surface finish: 3~4 grade

Chamfer: <0.25mmX45°

Coating: Aluminum coating + black paint protection on the reflective surface, single-layer

 MgF2 anti-reflection coating on the incident and exit surfaces