Opacimeter attenuator

The neutral density filter produced by Borisun Optics has the characteristics of high transmittance accuracy, good flatness and high chemical stability. It is coated on optical glass with inconil film material. The attenuation wavelength can be from 200nm to 1100nm according to the needs. Compared with the common absorption type attenuator, this coated attenuator is not limited by the thickness of the substrate, because the attenuation ability is realized by the film, The absorbing glass must depend on the thickness of the substrate, and the absorbing glass only has a good attenuation effect on the visible region, and the controllability of the attenuation in the infrared and ultraviolet bands is very poor.

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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