Gradual attenuation filter

Gradual attenuation filter (AF) is a reflective attenuation filter produced by Borisun Optics Optoelectronics, which can change the light transmittance by linear movement or rotation. By rotating or moving, the luminous flux can be continuously adjusted to obtain any brightness, and the relative change of transmittance can make it easier to dynamically adjust the luminous flux.

The gradual attenuation filter produced by Borisun Optics can gradually attenuate in the range of OD1-OD4 according to the requirements of customers.

AF filters
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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