This is the 16-047 Neutral Density Filter from Edmund Optics, featuring a 25 mm diameter and a thickness of 4.95 mm. The filter is designed with a circular base shape and a thin lens geometry, making it suitable for a wide range of optical applications.
The filter is made from SCHOTT NG12, a high-quality optical glass known for its excellent transmittance and low autofluorescence. This material is particularly useful in applications where high-precision optical performance is required. The filter's neutral density characteristic is achieved through a precision absorptive coating, which is applied to both the front and back surfaces (edm 16-047). This coating provides an optical density of 0.1, which is equivalent to a 10% transmission, within the wavelength range of 450-700nm.
The filter's catalog number is 16-047, and it is currently in stock. You can find more information about this product, including its datasheet and pricing, on the Edmund Optics website through the following link: https://www.edmundoptics.com/p/01-od-25mm-dia-precision-absorptive-nd-filter/43752/.