Specification

Material:                     SF11 Grade A optical glass

Dimension Tolerance:    +0.0, -0.2mm

Clear Aperture:            >80%

Flatness:                            l/8@633nm

Theta:                        q=29°27' ± 3”

Surface Quality:           60-40 scratch and dig

Coating:                      MgF2 single layer on perpendicular surface