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    • 671 nm Laser Line Bandpass Filter

    The 671 nm laser line bandpass filter is a narrow-band interference filter specifically designed for the 671 nm laser wavelength. It provides high transmission for the target laser while offering high optical density (OD) blocking performance for other wavelength regions, effectively suppressing stray light, ambient light, and laser side lobes. This improves system signal‑to‑noise ratio and measurement accuracy. The product is widely used in laser Raman spectroscopy, fluorescence detection, confocal microscopy, machine vision, laser metrology, biomedical imaging, and scientific research.

    Product features：Optimized specifically for 671 nm laser；Peak transmittance T > 90%； Ultra‑narrow bandwidth 2.6 nm (FWHM)；High blocking depth up to OD6；Efficient suppression of ambient background light；High stability and low scattering

    Part Number：MP-LLF-671

    Application area：Raman spectroscopy systems | Laser fluorescence detection | Confocal microscopy | Research optical platforms

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    Main parameters
  • Core parameters

  • Laser Wavelength Transmission Band

    671nm T > 90% 671 nm

  • Dimension Drawing
    • General Parameters

    Specification

    Value

    Laser Wavelength

    405 nm

    Transmission Band

    T > 90%  671 nm

    Blocking Band

    ODabs > 5  540.4 – 664.3 nm

    Blocking Band

    ODabs > 6  617.3 – 660.9 nm

    Blocking Band

    ODabs > 6  681.1 – 738.1 nm

    Blocking Band

    ODabs > 5  677.7 – 961.2 nm

    FWHM Bandwidth

    2.6 nm

    Guaranteed Minimum Bandwidth

    Transmission guaranteed for laser wavelength only

    Angle of Incidence

    0 ± 2 °

    Clear Aperture

    ≥ 10 mm

    Transverse Dimensions, Diameter

    12.5mm

    Filter Thickness, Mounted

    3.5mm

    Filter Thickness Tolerance, Mounted

    ± 0.1mm

    Filter Thickness, Unmounted

    2.0mm

    Filter Thickness Tolerance, Unmounted

    ± 0.1mm

    Surface Quality (Scratch-Dig)

    60-40

    Filter Effective Index

    2.09

    Optical Damage Rating

    0.1 J/cm sq. @ 532 nm (10 ns pulse width)

    Orientation

    Arrow on ring is preferred direction of propagation of light

     

    Spectral Characteristic Curves

     

    Transmittance-Wavelength Spectrum

    图片1.png 

     

     

    Optical Density Spectrum

     图片2.png


    Optional Configurations

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    Downloads

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  • Product title: 671 nm Laser Line Bandpass Filter
  • Product link: https://www.idealphotonics.com/product/detail/1676.html

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    • 10000 10k + Diodes sold worldwide
    • 30 30+ Invention patent
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