Min. Order Reference FOB Price
600 Pieces US$2.50-8.90 / Piece
Product Description
specification: Material BK7, Fused Silica,Ge,Si, CaF2. Diameter 5-300mm Surface Figure λ/2 Diameter Tolerance +0.01, -0.01 mm Thickness Tolerance ±0.1 mm Paraxial Focal Length ±2% Centration 85% Surface Quality 60-40 scratch and dig or better Protective Bevel ...