Photographic lens attenuation filter

The neutral density attenuation filter uses the absorption or reflection characteristics of the material to attenuate the light intensity. After the light from the visible region to the near-infrared region passes through the neutral density filter, different waves attenuate in the same proportion, so that the optical elements maintain approximately equal light energy transmittance in the wide band.

Borisun Optics is a professional filter manufacturer. It can customize and produce neutral density attenuation filters with different wavelengths from near ultraviolet to near infrared according to the needs of customers.

1% filter
Technical parameters
Items Parameters
Product index customizable
Size range 10-100mm
Thickness 2 ± 0.1mm
Density tolerance ± 2%
Luminous aperture > 90%
Materials green plate glass, K9 glass, fused quartz
Attenuation band (1) UV (ultraviolet band): 250nm~380nm, attenuation 20%, 50%; (2) VIS (visible light band): 400nm~700nm attenuation: 99%, 90%, 80%, 70%, 50%, 30%, 20%, 10%; (3) Vis+NIR (visible band and near infrared band): 400nm~1000nm; (4) Optical communication band: 1200nm, 1310nm, 1550nm, transmittance after attenuation 70%, 20%, 50%, 1%, etc.
spectral curve

In addition, We can customize the optical filters according to customer requirements or drawings.

For details, please consult:

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