65-232 50 mm Dia. Hard Coated OD 4.0 10nm Bandpass Filter; t=3.5 mm 656nm

The 65-232 is a Bandpass Filter, specifically designed for use in optical systems that require a narrow bandwidth of light centered around 656nm. This filter is sourced from Edmund Optics, a renowned vendor in the optical industry. The filter is characterized by a circular shape with a diameter of 50mm and a thickness of 3.5mm, making it suitable for a wide range of applications.

The filter's primary function is to allow light within a specific wavelength range to pass through while blocking out other wavelengths. In this case, the 65-232 filter is designed to pass light between 651nm and 661nm, with a central wavelength (CWL) of 656nm. This makes it ideal for applications that require a high degree of wavelength specificity.

The filter's front and back surfaces are coated with EDM 65-110, a hard coating that enhances the filter's durability and resistance to wear and tear. This coating also helps to reduce surface reflections, improving the overall efficiency of the optical system.

The filter's geometry and physical data suggest that it is a thin lens, which can be beneficial in applications where space is limited or where a thin, lightweight optical element is required. The filter's catalog number is 65-232, and it is currently in stock, according to the vendor's website.