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484nm Long-Pass Dichroic Filter
This product is a 484 nm longpass dichroic beamsplitter specifically designed for optical systems with a 45°angle of incidence. It employs a highperformance dielectric multilayer coating process to achieve highly efficient reflection in the 350-475 nm band and high transmission with an average transmittance greater than 93% in the 492.3-1200 nm band. It features steep cuton edge, precise wavelength separation, low wavefront error, and excellent optical stability. The filter meets the optical performance requirements for imagesplitting applications, with a reflected wavefront error below 0.2λ (PV @ 632.8 nm), effectively ensuring imaging quality and system resolution. It is suitable for separating common fluorophore pairs such as DAPI/FITC and BFP/GFP. Widely used in fluorescence microscopy, confocal microscopy, multichannel fluorescence detection, biomedical analysis, flow cytometry, laser beam splitting, and other highprecision optical instruments, it is an ideal optical component for efficient spectral separation and highquality imaging in life sciences, medical diagnostics, and research.
Product features:484 nm standard long‑pass cut‑on wavelength;45° standard operating angle;High transmittance(Tavg >93%);High reflectivity (350–475 nm);Low wavefront error;High optical power tolerance
Part Number:MP-DF-484
Application area:Fluorescence microscopy | Multicolor fluorescence imaging | Laser beam paths | Spectrometers | Biological detection equipment
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Edge Wavelength Transmission Band Reflection Band
484 nm Tavg > 93% 492.3 – 1200 nm 350 – 475 nm

Specification | Value |
Transmission Band | Tavg > 93% 492.3–1200 nm |
Reflection Band | 350 – 475 nm |
Edge Steepness | Standard (for Fluorescence) |
Edge Wavelength | 484nm |
Angle of Incidence | 45 ± 1.5 ° |
Cone Half-angle | 2° |
Flatness / RWE Classification | Image-splitting |
Reflected Wavefront Error | < 0.2 P-V RWE @ 632.8 |
Common Fluorophore Pair to Split | DAPI/FITC or BFP/GFP |
Clear Aperture | ≥ 80% (elliptical) |
Transverse Dimensions, LxW | 25.2 mm x 35.6 mm |
Filter Thickness, Unmounted | 3.0mm |
Filter Thickness Tolerance, Unmounted | ± 0.1mm |
Surface Quality (Scratch-Dig) | 60-40 |
Filter Effective Index | 2.0 |
Optical Damage Rating | Testing 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. |
Orientation | Reflective surface marked with part-Orient in incoming light |
Spectral Characteristic Curves
Transmittance-Wavelength Spectrum
Optical Density Spectrum
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