This is a 35-872 Bandpass Filter, offered by Edmund Optics, with a diameter of 12.5 mm and a thickness of 3.5 mm. The filter is designed to transmit light within a specific range of wavelengths, centered around 260nm, while blocking other wavelengths. The cut-on wavelength is 255nm, and the cut-off wavelength is 265nm, providing a 10nm bandpass.
The filter is made from UVFS MAL-1965 material, and it features hard coating on both the front and back surfaces, identified as EDM 35-872. This coating enhances the filter's durability and resistance to environmental factors. The filter's geometry is in the shape of a thin lens.
According to the vendor's information, this item is currently in stock and available for purchase. The catalog number for this item is 35-872, and more detailed information can be found on the Edmund Optics website at https://www.edmundoptics.com/p/260nm-cwl-125mm-dia-hard-coated-od-4-10nm-bandpass-filter/33365/.