可变密度滤光片
尺寸:............................................................φ50 x 2mm (ID:φ7.5)
公差: 外径公差:...........................................................+0/-0.25mm
内孔公差: ..........................................................+0.25/-0mm
厚度公差: .............................................................±0.25mm
镀膜区域角度误差: .................................................................±1º
设计波长: .................................................................380-1200nm
镀膜: ...........................................................................ND (正面)
面形: .....................................................................λ/2@632.8nm
光洁度: .............................................................................60-40
平行度: .......................................................................<3 arc min
光强误差:..................................................................±5% (两极处)
线性误差: ............................................................................±5%
倒角: ........................................................................0.2 x 0.2mm
渐变方向: ..........................................................................逆时针
