These filters possess level spectral transmittance characteristics in the visible region and attenuate light by absorption with minimal reflection. Typically, neutrality and density of absorptive filters are a function of the material and the thickness.
80/50 or better
<5 arc minutes
±5% of OD, OD=Lg(1/T)
Reflective Neutral Density (ND) Filters
These filters have constant density values across the surface. The transmission to reflection ratio varies with density selection. ND filters are used primarily for the attenuation of light over a wide spectral range. They are often used in laser and photometer applications.
All products are guaranteed to be in specifications in material and workmanship for a period of 12 months after shipment.
We do not assume liability for installation, labor or consequential damages.
This warranty is not suitable for failure of the products due to misuse, abuse, accident, or neglect.