Technical requirements:

1. Surface accuracy requirements: After coating: RMS≤λ40; Pvr≤λ4(λ = 632.8nm) (angle of incidence: 45°)

2.Chamfer: 0.6 x45° 

3. Reflection Coatings on surface 1; ant-damage threshold: >1.71J/cm2@8ns, 214MW/cm2; Rs299.8%, Rp299.8% (for the1064nm wave band), or Rs≥95%, Rp≥95% (for the 532nm wave band)(for the 532nm wave band) (angle of incidence: 45°)