64-677 12.5 mm Dia. Traditional Coated OD 2.0 Longpass Filter; t=1.5mm 875nm

The 64-677 is a Longpass Filter, a type of optical filter that transmits wavelengths longer than a specified value, while blocking shorter wavelengths. This particular model has a diameter of 12.5 mm and a thickness of 1.5 mm, making it suitable for a wide range of optical applications.

The filter is manufactured by Edmund Optics, a leading supplier of optical components, and is identified by the catalog number 64-677. It is available for purchase directly from the Edmund Optics website, where it is currently listed as in stock.

The 64-677 features a coating on both the front and back surfaces, identified as 'edm 64-677'. This coating is designed to enhance the filter's performance and durability.

The filter's cut-on wavelength is 875 nm, meaning it begins to transmit light at this wavelength. The cut-off wavelength, which is the point at which the filter stops transmitting light, is 0 nm. This makes the 64-677 ideal for applications that require the transmission of infrared light.

The filter is designed in the shape of a thin lens, which can be beneficial in applications where a flat filter would cause unwanted reflections or distortions. This feature, combined with its compact size and high transmission efficiency, makes the 64-677 a versatile and valuable addition to any optical system.