640DF20 12.7 mm Dia. Protected Coating; Bandpass Filter Protected Coating

The 640DF20 is a Bandpass Filter, a type of optical element that allows light within a specific range of wavelengths to pass through while blocking other wavelengths. This particular model, sourced from the reputable vendor Omega Optical, has a catalog number of 640DF20 and is available for purchase on their official website.

The filter boasts a circular shape with a diameter of 12.7 mm and a thickness of 6.3 mm, making it a compact yet effective solution for various optical applications. It is constructed using UVFS MAL-1965 material, a choice that contributes to its overall performance and durability.

The 640DF20's physical data is as follows: it is designed to cut on at 630 nm and cut off at 650 nm, with a central wavelength (CWL) of 640 nm. This specificity in wavelength control makes it an ideal choice for applications that require precise light filtration.

The filter is further enhanced with protected coatings on both the front and back. These coatings, identified as OME 640DF20, provide additional protection to the filter, enhancing its longevity and resistance to wear and tear. The filter's shape is classified as a Thin Lens, further attesting to its versatility and potential applications.