This is a 12-244 25 mm Dia. Infrared (IR) Neutral Density Filter, designed with an Optical Density (OD) of 0.5, specifically for the 2-14 µm wavelength range. The filter is sourced from the reputable vendor, Edmund Optics, and is available for purchase through their website, with the catalog number 12-244.
The filter is a Circular type, made from Germanium Burnett material, and features AR coating on both the front and back surfaces, identified as EDM 12-004. It has a diameter of 25 mm and a thickness of 1 mm, designed in the shape of a Thin Lens. The filter's Neutral Density property ensures equal attenuation of all wavelengths, making it ideal for various applications that require infrared light control.
Please note that the filter's status is currently in stock, as indicated by its weblink status. For more detailed information, users are encouraged to visit the provided weblink: https://www.edmundoptics.com/p/05-od-25mm-dia-ar-coated-ir-neutral-density-filter/40939/