Optical attenuation filter

Optical attenuation filter, also known as attenuation filter, attenuation mirror, neutral density attenuation filter, nd mirror, attenuation filter, etc.

The attenuation sheet uses the absorption characteristics of the material to the light. After the light is incident at 0 °, part of the light is absorbed and reflected by the attenuation sheet, which can change the penetration inducement rate. Different wavelengths are attenuated in the same proportion, and can be attenuated according to the designed spectral film system, such as 10%, 20%, 25%

At present, optical attenuators are widely used in the field of lattice strong light, laser equipment application, detection equipment attenuation, influence equipment attenuation, optical communication transmission attenuation, etc.

1% filter
Technical parameters
Items Parameters
Product index customizable
Size range 10-100mm
Thickness 2 ± 0.1mm/ 4+-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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