69-903 25.2 x 35.6 mm Dichroic Longpass Filter; t=1.05mm 700nm

The 69-903 Dichroic Longpass Filter is a high-quality optical component manufactured by Edmund Optics. This filter is designed to selectively transmit light with wavelengths above 700nm while reflecting or absorbing shorter wavelengths. It is a crucial element in various optical systems, including spectroscopy, fluorescence microscopy, and beam combining.

The filter measures 25.2mm in width and 35.6mm in height, making it suitable for use in compact optical setups. It has a thickness of 1.05mm, which contributes to its robustness and stability. The rectangular shape of the filter allows for easy integration into various optical systems.

The 69-903 filter is made from UVFS Mal-1965, a material known for its excellent optical properties. It features a dichroic coating on both the front and back surfaces, identified as EDM 69-870. This coating ensures high transmission efficiency and durability, making the filter suitable for demanding applications.

The filter's physical data indicates a cut-on wavelength of 700nm, meaning it starts transmitting at this wavelength. The cut-off wavelength is 0nm, indicating that it blocks all wavelengths below 700nm. This makes it an ideal longpass filter for applications where such wavelength selectivity is required.