FNG3025 25 mm Dia. Absorptive Glass Neutral Density Filter 546nm

The FNG3025 is a 25 mm diameter Neutral Density Filter, sourced from the reputable optical components vendor, Knight Optical. This filter is designed with a specific wavelength of 546nm, making it suitable for applications that require precise light control at this frequency.

The filter is of the Neutral Density type, which means it reduces the intensity of light without altering its color. This is achieved through the use of absorptive glass, which absorbs a portion of the light that passes through it. The absorptive glass used in this filter is identified by the Material ID "uvfs mal- 1965".

The FNG3025 has a base shape of a circle, a standard in many optical applications due to its symmetry and ease of alignment. It has a thickness of 2.9mm, providing structural rigidity while maintaining a low profile. The filter's shape is classified as a Thin Lens, which suggests a minimal optical power and a flatter profile compared to traditional lenses.

The filter's front and back surfaces are coated with "kni fng30", a coating that likely enhances the filter's performance and durability. However, the specifics of this coating are not provided in the item data.