ULTRA Series quadband dichroic filter with 409 nm (± 3.0 nm), 496 nm (± 3.0 nm), 567 nm (± 3.0 nm), and 655 nm (± 4.0 nm) cut-on wavelengths, steep edge transitions, greater than 93% average transmittance, and greater than 95% average reflectance. This polychroic filter is designed for use at a 45 degree angle of incidence (AOI). It is coated on a 1.04 mm fused silica substrate and is 25.2 mm x 35.6 mm (± 0.1 mm) in size. Alluxa ULTRA Series longpass dichroic beamsplitters are designed for use with our fluorescence excitation and emission filters to optimize fluorescence instrument performance, resulting in bright, high contrast images of target molecules. All Alluxa optical filters are highly durable and hard-coated using our innovative SIRRUS plasma deposition process. Contact us for custom sizing.