69-904 25.2 x 35.6 mm Dichroic Longpass Filter; t=1.05mm 750nm

The 69-904 Dichroic Longpass Filter is a high-quality optical component sourced from Edmund Optics. This filter is designed with a rectangular base shape and a thickness of 1.05mm, making it suitable for a wide range of optical applications. The filter is made from UVFS Mal-1965 material, ensuring durability and reliability.

The 69-904 filter is a longpass filter, which means it allows light with wavelengths longer than a specified value to pass through while blocking shorter wavelengths. In this case, the cut-on wavelength is 750nm, making this filter ideal for applications that require the transmission of infrared light. The cut-off wavelength is 0nm, indicating that this filter blocks all wavelengths of light shorter than 750nm.

The filter features a dichroic coating on both the front and back surfaces. This coating is specifically designed to reflect or transmit light of different wavelengths, depending on the coating's properties. In this case, the coating is Edmund Optics' EDM 69-871, which is a broadband anti-reflection coating designed to reduce surface reflections and improve transmission.

The 69-904 filter has a width of 25.2mm and a height of 35.6mm, making it a medium-sized filter suitable for many optical systems. It is available directly from Edmund Optics and is currently in stock, ensuring quick delivery for your optical project needs.