Edmund Optics Inc. 825nm OD 2 Longpass Filter 50mm Diameter NT64-690

Sharp Cut-On Wavelength High Rejection/Transmissi on Efficiency Precision Fused Silica Substrate Our TECHSPEC® Longpass filters are designed to have a sharp transition from reflection to transmission, making them ideal for various applications. Available in a variety of cut-on wavelengths, these filters are designed for fluorescence and order sorting applications. Eliminate stray light by creating custom bandpass filters when combined with our TECHSPEC® Shortpass Filters. A single layer AR coating on the back surface enhances the overall efficiency of each filter.Our longpass filters are available in a number of kit configurations. Visible filter kits are available in 25nm increments (featuring 14 filters) or 50nm increments (featuring 7 filters). NIR Kits are available in 50nm increments (featuring 8 filters). All filter kits are available in 12.5, 25, and 50mm diameters.