Neutral Density filter

Specifications of neutral density filter                                                               
Attenuation wavelength:200nm-1550nm
absorptivity:OD=0.5,OD=1,OD=2,OD=3,OD=5,OD=10,OD=20,OD=30

Attnuation wavelength:
1.UV wavelength:250nm to 380nm,transmisson after absorptivity 20%,50%
2.Vis wavelength:400nm to 700nm,transmission after  absorptivity 99%,90%,80%,70%,50%,30%,20%,10%.
3.VIS+NIR:400nm to1000nm OD=0.5,OD=1,OD=2,OD=3,OD=5,OD=10,OD=20,OD=30
4.photo-communication wavelength:1200nm,1310nm,1550nm,transmission after absorptivity 70%,20%,50%,1% 
5.Size:2mm to 200mm+/-0.1
6.Surface quality:40-20
7.Flatness:1/4lambda or better
8.protective chamfer 

Application of neutral density filter                                                                     
laser,camre, Optical attenuation filter ,
Security cameras, Uv measuring instrument  and so on.