13-188 50 mm Dia. Hoya ND-13 Absorptive Neutral Density Filter; OD 0.9 600-1050nm

The 13-188 is a 50 mm diameter Neutral Density Filter, manufactured by Hoya and sourced from Edmund Optics. This filter is designed for use in the near-infrared spectrum, specifically between 600 and 1050 nanometers, making it ideal for applications that require the reduction of light intensity without altering color balance.

The filter features an Optical Density (OD) of 0.9, which corresponds to a transmission of 36.8%. This means it reduces the light intensity by approximately 63.2%, offering a significant level of protection for sensitive optical components.

The 13-188 filter is made from UVFS material, identified as Mal-1965 in the Edmund Optics catalog. It has a thin lens shape and a thickness of 2.5 mm, which helps to minimize optical distortion and maintain image quality.

Both the front and back surfaces of the filter are coated with EDM 13-154, a proprietary coating developed by Edmund Optics. This coating enhances the filter's performance by reducing reflections and improving transmission, thereby increasing the overall efficiency of the optical system.

The filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by its weblink status. For more detailed information, including technical specifications and purchasing options, please refer to the provided weblink.