AND-15C-25 15 mm Dia. Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-15C-25 is a high-quality Neutral Density Filter, unmounted and round, with a diameter of 15 mm. This filter is designed for use in the visible light spectrum, specifically between 400-700nm. It is sourced from OptoSigma, a renowned vendor in the optical industry, and is available for purchase through their website.

This filter is of the Absorptive Neutral Density type, which means it reduces the intensity of light without altering its color composition. This is achieved through the use of a special coating, denoted as 'opt and-25' on both the front and back surfaces of the filter. This coating ensures consistent light reduction across the entire visible spectrum.

The filter has a thickness of 2mm, which is considered thin in the context of optical elements. This thinness is beneficial as it reduces the likelihood of introducing optical aberrations. The filter's geometry is shaped as a Thin Lens, further minimizing potential distortions.

The material ID for this filter is 'uvfs mal- 1965'. This identifier is crucial for understanding the filter's optical properties and compatibility with other optical elements in a system.