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224.3 nm Ultrasteep Long Pass Filter
The MP-LPF-224 is an ultrasteep long pass filter designed specifically for the 224.3 nm laser line, primarily used in UV Raman spectroscopy, fluorescence detection, laser spectrum analysis, and precision optical systems. This filter offers high blocking performance with OD > 6 at 224.3 nm, and provides an average transmittance greater than 90% over the 235–505.9 nm band. It is fabricated on fused silica substrate, ensuring excellent UV transmission and environmental stability.
Product features:Optimized for 224.3 nm laser;Blocking depth > OD6 at 224.3 nm;Average transmittance > 90% from 235 to 505.9 nm;Ultrasteep spectral edge transition, suitable for Raman applications;Fused silica substrate;Standard diameter 25 mm, clear aperture ≥ 22 mm
Part Number:MP-LPF-224
Application area:224.3 nm UV Raman spectroscopy systems | Deep-UV Raman detection | UV fluorescence spectroscopy | Semiconductor material analysis | Research-grade UV optical equipment
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Laser Wavelength Transmission Band
224.3 nm Tavg > 90% 235 -505.9 nm

Specification | Value |
Laser Wavelength | 224.3 nm |
Transmission Band | Tavg > 90% 235 -505.9 nm |
Blocking Band | OD > 6 224.3 nm |
Blocking Band | ODavg > 6 202 – 224.3 nm (typical) |
Edge Steepness | 0.033 |
Edge Steepness | 1424.2 cm⁻¹ |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 7.4 |
Edge Wavelength | 235.6 nm |
Transition Width | 10.1 nm |
Transition Width | 1920 cm-¹ |
Angle of Incidence | 0 ± 2° |
Cone Half-angle | 5° |
Clear Aperture | ≥ 22 mm |
Transverse Dimensions, Diameter | 25 mm |
Filter Thickness, Mounted | 3.5 mm |
Filter Thickness Tolerance, Mounted | ± 0.1 mm |
Filter Thickness, Unmounted | 2.0 mm |
Filter Thickness Tolerance, Unmounted | ± 0.1 mm |
Surface Quality (Scratch-Dig) | 60-40 |
Filter Effective Index | 3.2 |
Optical Damage Rating | 0.5 J/cm2 @ 266 nm (10 ns pulse width),1 J/ @ 53 cm2 2 nm (10 ns pulse width) |
Orientation | Arrow on ring is preferred direction of propagation of light |
Substrate Type | Fused Silica |
Spectral Characteristic Curves
Transmittance-Wavelength Spectrum

Optical Density Spectrum

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