67-918 50 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=5.9mm 840nm

The 67-918 is a mounted traditional coated bandpass interference filter, designed and manufactured by Edmund Optics. This filter is characterized by its 50 mm diameter and 5.9 mm thickness, making it suitable for a wide range of optical applications. The filter's primary function is to allow light in a specific wavelength range to pass through while blocking other wavelengths, making it an essential component in various optical systems.

The 67-918 filter is designed to operate at a central wavelength (CWL) of 840 nm, with a full width at half maximum (FWHM) of 10 nm. This means it allows light within a narrow band around 840 nm to pass through while blocking light outside this range. The cut-on wavelength is 835 nm, and the cut-off wavelength is 845 nm, further illustrating its narrowband transmission characteristics.

The filter's front and back surfaces are coated with EDM 67-784, a proprietary coating developed by Edmund Optics. This coating enhances the filter's performance and durability, ensuring reliable operation in various environments. The filter's shape is that of a thin lens, further expanding its potential applications in optical systems.

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