- Cart
- |
- Personal Center
- |


561.4 nm Ultrasteep Raman Long-Pass Filter
The MP-LPF-561 is an ultra-steep longpass edge filter specifically designed for 561.4 nm laser Raman spectroscopy systems. Manufactured with a high-quality fused silica substrate and precision dielectric thin‑film coating technology, it provides efficient blocking of the 561.4 nm excitation laser while maintaining high transmission in the Raman scattering signal band. Featuring laser suppression of OD > 6, an ultra-narrow transition band, and an ultra-steep cut-off edge, this filter effectively reduces Rayleigh scattering background and improves Raman signal detection sensitivity. It is suitable for high-end Raman spectrometers, laser analysis systems, and research-grade optical inspection equipment.
Product features:Specifically designed for 561.4 nm Raman laser systems;High transmission: average transmittance > 93%;Laser blocking depth: OD6;Ultra‑steep cut‑off edge, suitable for high‑resolution Raman spectroscopy;Narrow transition band design, effectively improving weak Raman signal collection efficiency;Fused silica substrate with excellent thermal and environmental stability
Part Number:MP-LPF-561
Application area:Raman spectrometers | Laser Raman Imaging Systems | Biomedical Detection | Laser Spectroscopy Analysis | Scientific Research Equipment
Add to Cart Request for Quotation Consult Favorite
Laser Wavelength Transmission Band
561.4 nm Tavg > 93 % 565–1266.3 nm

Specification | Value |
Laser Wavelength | 561.4 nm |
Transmission Band | Tavg > 93 % 565–1266.3 nm |
Blocking Band | OD > 6 561.4 nm |
Blocking Band | ODavg > 6 450 – 561.4 nm (typical) |
Edge Steepness | 0.002 |
Edge Steepness | 35.6 cm-1 |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 1.1 |
Edge Wavelength | 563.1 nm |
Transition Width | 2.8 nm |
Transition Width | 89 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 | 2.02 |
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

--
Request for Quotation
We will reply to all your information about the product in time.
⇪