Neutral density filter is also called medium gray density lens, referred to as ND lens, its role is to filter light. This filter effect is non-selective, that is to say, ND mirror on a variety of different wavelengths of light reduction ability is the same, uniform, only play the role of weak light, and the color of the original object will not have any impact, so can truly reproduce the contrast of scenery.
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Description
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.
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