Visible light optical filter

glassneutral-density

Since Hoya neutral density filters consist level spectral relay properties in the visible area with impaired light by immersion with nominal reflection. The objectivity and thickness of absorptive filter are a main highlight of this product. The particular optical density of the filters is just a feature of the glass type. They are highly useful in light regulation applications for calculating tools and exposure regulation in imaging. Additionally, the Spectral changes take place with the rise in optical density of the filters. This optical density offers additional connections such as stacking filters with OD frequencies of 0.6 and 0.9 that obtains a resultant density of 1.5. Moreover, the optical density is linked to the relay in T = 10^-OD x 100 = percent transmission.