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514.5 nm Ultrasteep Raman Long-Pass Filter
The MP-LPF-514 is an ultra-steep longpass edge filter specifically designed for 514.5 nm laser Raman spectroscopy systems. Manufactured using high-performance dielectric thin-film coating technology, it effectively blocks the excitation laser while providing high transmission for Raman scattering signals. With an ultra-steep cut-off edge, high blocking depth, and excellent optical stability, it is widely used in Raman spectrometers, research analysis instruments, biomedical detection, and precision optical systems.
Product features:Specifically designed for 514.5 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-514
Application area:Raman spectrometers | Laser Raman Imaging Systems | Biomedical Detection | Laser Spectroscopy Analysis | Scientific Research Equipment
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Laser Wavelength Transmission Band
514.5 nm Tavg > 93 % 521.2–1160.5 nm

Specification | Value |
Laser Wavelength | 514.5 nm |
Transmission Band | Tavg > 93 % 521.2–1160.5 nm |
Blocking Band | OD > 6 514.5 nm |
Blocking Band | ODavg > 6 416 – 514.5 nm (typical) |
Edge Steepness | 0.5% |
Edge Steepness | 96.7 cm-1 |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 2.6 |
Edge Wavelength | 519.2 nm |
Transition Width | 5.1 nm |
Transition Width | 192 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 | 1.84 |
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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