85-909 50 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1250nm

The 85-909 is a Bandpass Filter, specifically designed by Edmund Optics with a diameter of 50 mm and a thickness of 3.5 mm. This filter is part of the UVFS MAL-1965 material ID family, which is renowned for its exceptional performance in various applications.

The filter's primary function is to allow light transmission within a specific range of wavelengths while blocking light outside this range. The 85-909 is designed to permit light transmission between 1225nm and 1275nm, as indicated by its cut-on and cut-off wavelengths. The central wavelength (CWL) of this filter is 1250nm, which is the wavelength at which the filter's transmission is at its maximum.

The 85-909 filter features hard coating on both the front and back surfaces, identified by the coating code EDM 85-885. This coating enhances the filter's durability and resistance to environmental factors, ensuring longevity and maintaining its performance over time.

The filter's shape is defined as a Thin Lens, which is a type of optical component with a curved surface that bends light as it passes through. This shape, combined with the filter's specific wavelength range, makes the 85-909 an ideal component for various applications that require precise light control and filtration.

The 85-909 filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by its weblink status. For more detailed information, users are encouraged to visit the provided weblink.