67-889 50 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=6.9 mm 326nm

The 67-889 is a mounted traditional coated bandpass interference filter, designed and manufactured by Edmund Optics. This filter is characterized by its 50 mm diameter and 6.9 mm thickness, making it suitable for a wide range of optical applications. The filter's primary function is to allow light within a specific wavelength range to pass through while blocking light outside this range.

The 67-889 filter is centered at 326nm, with a full width at half maximum (FWHM) of 10nm. This means it allows light with a wavelength of approximately 326nm to pass through, while blocking out light that is significantly shorter or longer than this wavelength. The filter's cut-on wavelength is 321nm, and its cut-off wavelength is 331nm, further illustrating its narrow bandpass properties.

The filter's coating plays a crucial role in its performance. Both the front and back surfaces of the filter are coated with EDM 67-755, a proprietary coating developed by Edmund Optics. This coating enhances the filter's durability and performance, ensuring it maintains its specified characteristics even under demanding conditions.

The filter's shape is that of a thin lens, which contributes to its compact design and ease of integration into various optical systems. The filter is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink.