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    • 671 nm Ultrasteep Raman Long-Pass Filter

    The MP-LPF-671 is a high-performance dielectric thin-film filter specifically designed for 671 nm laser Raman spectroscopy systems. Manufactured on a high-quality fused silica substrate with precision hard‑coated dielectric layers, it provides efficient rejection of the 671 nm laser line while maintaining high transmittance for Raman scattering signals. Featuring an ultra-steep cut-off edge, an extremely high optical density (OD > 6), high pass-band transmittance, and excellent environmental stability, this filter effectively improves the signal-to-noise ratio of Raman spectroscopy systems. It is particularly suitable for low-wavenumber Raman measurements, micro-Raman spectroscopy, laser spectral analysis, and research optical instruments.

    Product features：Specifically designed for 671 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-671

    Application area：Raman spectrometers | Laser Raman Imaging Systems | Biomedical Detection | Laser Spectroscopy Analysis | Scientific Research Equipment

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    Main parameters
  • Core parameters

  • Laser Wavelength Transmission Band

    671 nm Tavg > 93 % 679.7–1513.5 nm

  • Dimension Drawing
    • General Parameters

    Specification

    Value

    Laser Wavelength

    671 nm

    Transmission Band

    Tavg > 93 %  679.7–1513.5 nm

    Blocking Band

    OD > 6  671 nm

    Blocking Band

    ODavg > 6  545 – 671 nm (typical)

    Edge Steepness

    0.5%

    Edge Steepness

    74.1 cm-1

    Edge Steepness

    Ultrasteep (for Raman)

    Edge Steepness

    3.4

    Edge Wavelength

    676.1 nm

    Transition Width

    6.7 nm

    Transition Width

    147.6 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

    1.81

    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

    图片2.png 

     

     

    Optical Density Spectrum

     图片3.png


    Optional Configurations

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  • Product title: 671 nm Ultrasteep Raman Long-Pass Filter
  • Product link: https://www.idealphotonics.com/product/detail/1663.html

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    • 10+ 10 Years of Experience
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    • 10000 10k + Diodes sold worldwide
    • 30 30+ Invention patent
    • 10 10+ Advanced Optical Solutions

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