67-850 25 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=5.9mm 820nm

The 67-850 is a mounted traditional coated bandpass interference filter, designed and manufactured by Edmund Optics. This filter is characterized by its 25 mm diameter and 5.9 mm thickness, making it suitable for a wide range of applications. The filter's primary function is to allow light in a specific wavelength range to pass through while blocking other wavelengths.

The 67-850 filter is centered at 820 nm, with a full width at half maximum (FWHM) of 10 nm. This means it allows light with a wavelength close to 820 nm to pass through while blocking light with wavelengths further away from this value. The filter's cut-on wavelength is 815 nm, and the cut-off wavelength is 825 nm, further illustrating its narrow bandpass properties.

The filter features a thin lens shape and is made from UVFS Mal-1965 material. It is coated on both the front and back with EDM 67-783, a type of anti-reflection coating that reduces surface reflections and increases transmission. This coating ensures that the maximum amount of light is transmitted through the filter, enhancing its performance.

The filter is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. With its high-quality construction, specific wavelength range, and reliable performance, the 67-850 is an excellent choice for various optical applications.