Material:BK7,UV-grade fused  silica

Paraxial focal length:±5mm—±3000mm±1%

Length:2mm—300mm±1%

Width:2mm—200mm±1%

Surface quality:40-20scratch and dig

Surface Figure:λ/4,λ/2

Centration:3arc min

Thickness Tolerance:±0.20mm

Clear Aperture:90%