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    • 473 nm Ultrasteep Raman Long-Pass Filter

    The MP-LPF-473 is a high-performance ultra-steep edge long-pass filter specifically designed for 473 nm laser Raman spectroscopy systems. Manufactured using high-precision ion-beam sputtering (IBS) multi-layer dielectric coating technology, it provides a blocking depth of >OD6 at the 473 nm laser line while maintaining an average transmittance >93% over the 479.1-1066.9 nm range. This effectively eliminates Rayleigh scattered light, significantly improving Raman signal collection efficiency and detection sensitivity. Featuring an ultra-steep cut-off edge, extremely low Raman cut-off shift, broad spectral transmission range, and excellent environmental stability, this filter is suitable for research-grade Raman spectrometers, confocal Raman microscopes, biomedical analysis, and industrial in-line Raman detection applications.

    Product features：Specifically designed for 473 nm Raman laser systems；Rayleigh scattering blocking depth > OD6；Ultra‑steep cut‑off edge；Raman shift cut‑off at only 105.2 cm⁻¹；Fused silica substrate – low fluorescence and low stress；High environmental stability for long‑term use

    Part Number：MP-LPF-473

    Application area：Raman spectrometers | Confocal Raman microscopes | Semiconductor material inspection | Graphene and 2D material research | Scientific

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    Main parameters
  • Core parameters

  • Laser Wavelength Transmission Band

    473 nm Tavg > 93 % 479.1–1066.9 nm

  • Dimension Drawing
    • General Parameters

    Specification

    Value

    Laser Wavelength

    473 nm

    Transmission Band

    Tavg > 93 %  479.1–1066.9 nm

    Blocking Band

    OD > 6  473 nm

    Blocking Band

    ODavg > 6  383–473 nm (typical)

    Edge Steepness

    0.5 %

    Edge Steepness

    105.2 cm-1

    Edge Steepness

    Ultrasteep (for Raman)

    Edge Steepness

    2.4

    Edge Wavelength

    476.9 nm

    Transition Width

    4.7 nm

    Transition Width

    209 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

    1.85

    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: 473 nm Ultrasteep Raman Long-Pass Filter
  • Product link: https://www.idealphotonics.com/product/detail/1655.html

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