Material

BK7, Fused Silica or Other

Dimension And Tolerance

3x3, 5x5, 10x10, 12.7x12.7, 20x20, 25.4x25.4+0.0/-0.2mm or as requirement

Thickness Tolerance

±0.2mm

Clear Aperture

>90%

Flatness

λ/4@632.8nm per 25mm range

Surface Quality

60/40 or better

Coating(Internal Reflectance and External Reflectance)

Enhanced Aluminum or Protected Gold or other Metal Coating and Dielectric Coating on hypotenuse, two legs AR coated