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407 nm Ultrasteep Raman Long-Pass Filter
The MP-LPF-407 is a high-performance ultra-steep edge long-pass filter specifically designed for Raman spectroscopy systems. Manufactured using high-precision ion-beam sputtering (IBS) multi-layer dielectric coatings, it provides a blocking depth of >OD6 at the 407 nm laser line while maintaining an average transmittance >93% over the 412.3–918 nm range. This effectively suppresses Rayleigh scattering and enhances Raman signal collection efficiency. The filter is ideal for 407 nm laser Raman spectrometers, confocal Raman microscopy systems, scientific research, and precision optical detection equipment.
Product features:Dedicated to 407 nm Raman laser systems;Rayleigh blocking depth > OD6;Ultra‑steep cut‑off edge;Raman shift cut‑off at only 122.2 cm⁻¹;Fused silica substrate – low fluorescence and low stress;Suitable for both research and industrial Raman applications
Part Number:MP-LPF-407
Application area:Raman spectrometers | Confocal Raman microscopes | Semiconductor material inspection | 2D material research | Scientific research platforms
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Laser Wavelength Transmission Band
407 nm Tavg > 93 % 412.3–918 nm

Specification | Value |
Laser Wavelength | 407 nm |
Transmission Band | Tavg > 93 % 412.3–918 nm |
Blocking Band | OD > 6 407 nm |
Blocking Band | ODavg > 6 330.1 – 407 nm (typical) |
Edge Steepness | 0.5 % |
Edge Steepness | 122.2 cm-1 |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 2.0 |
Edge Wavelength | 410 nm |
Transition Width | 4.1 nm |
Transition Width | 243 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 | 2.2 |
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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