Substrate Material

UV Grade Fused Silica or BK7

Surface Figure

λ/10 typical at 633nm

Transmitted wavefront distortion

λ/10 typical at 633nm

Surface Quality

10/5 laser quality

Diameter Tolerance

+0.0mm~-0.25mm

Thickness Tolerance

±0.25mm

Wedge

≤5 minutes

Chamfer

0.25mm at 45° typical

Concentricity

≤0.05mm

Radius Tolerance

±0.5%

Coating Technology

Electron Beam Evaporation, Dielectric Mulitlayers

Adhesion and Durability

Per MIL-C-675A. Insoluble in lab solvents

Clear Aperture

>85% of dimension

Angle of Incidence

0°or  45°

Wavelength Range

248~2100nm

Transmittance

>95%

Reflectance

>99.5%

Laser Induced Damage Threshold

10J/cm2, 1 ns pulse, at 1064nm typical

Substrate Diameter(mm)

10, 12.7, 15, 20, 25, 25.4, 30