Semrock offers a wide range of polarization-insensitive dichroic beamsplitters that exhibit steep edges with very high and flat reflection and transmission bands. Filters are available in versions optimized for wideband light sources, laser sources, multiphoton systems, Raman spectroscopy, image splitting, and laser beam combining and separating.Optical SpecificationsSpecificationValueReflection Band 1Ravg > 94% 230 – 360 nmEdge Wavelength 1365 nmTransmission Band 1Tavg > 90% 370 – 508 nm
General Filter SpecificationsSpecificationValueAngle of Incidence45 ± 1.5 degreesCone Half-angle2 degreesOptical Damage RatingTesting has proven to show no signs of degradation when exposed to at least 6.0 W of power from an unfiltered xenon arc lamp over a 25 mm diameter (corresponding to 1.2 W/cm2) for over 500 hrs.FlatnessStandardSteepnessStandardFilter Effective Index1.64 Understanding ‘Effective Index of Refraction’ neff
Physical Filter Specifications (applies to standard sized parts; contact us regarding other sizes)SpecificationValueTransverse Dimensions (L x W)25.2 mm x 35.6 mmTransverse Tolerance± 0.1 mmFilter Thickness (Mounted)1.05 mmFilter Thickness Tolerance (Mounted)± 0.05 mmClear Aperture≥ 80% (elliptical)Scratch-Dig60-40Substrate Thickness (Unmounted)1.05 mmSubstrate Thickness Tolerance (Unmounted)± 0.05 mmOrientationReflective surface marked with part number - Orient in direction of incoming light