69-889 25 mm Dia. Dichroic Longpass Filter; t=1.05mm 550nm

The 69-889 Dichroic Longpass Filter, offered by Edmund Optics, is a circular filter with a 25 mm diameter and a thickness of 1.05 mm. This filter is designed to transmit light with wavelengths longer than 550 nm, making it ideal for applications that require the separation of visible and infrared light.

The filter is constructed with a base material identified as UVFS Mal-1965, and it features a dichroic coating on both the front and back surfaces. This coating, specifically EDM 69-867, is designed to reflect or transmit light based on its wavelength, enhancing the filter's longpass characteristics.

The 69-889 filter is designed to "cut on" at 550 nm, meaning it begins to significantly transmit light at this wavelength. It has no specified "cut off" wavelength, indicating that it continues to transmit light at longer wavelengths.

This filter is available for purchase through the Edmund Optics website, where it is listed as being in stock. For more detailed information, including technical drawings and performance data, users are encouraged to visit the product's dedicated webpage at https://www.edmundoptics.com/p/550nm-25mm-diameter-dichroic-longpass-filter/24155/.