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    • 475 nm Narrow Bandpass Optical Filter

    The MP-NBP-475 is a high-transmission bandpass filter designed for the blue-light region around 475 nm. It selectively transmits the target blue band while efficiently blocking ultraviolet, other visible, and near-infrared background light. The filter offers an average transmission Tavg > 92% over the 463.5-486.5 nm band and provides broad out-of-band rejection across the 200-950 nm range. Its typical FWHM bandwidth is 29.9 nm, striking a good balance between high signal transmission efficiency and effective out-of-band blocking. The product comes in a standard 25 mm diameter circular mounted housing, making it suitable for fluorescence detection, spectroscopic analysis, microscopy, biomedical optics, machine vision, and any optical system that requires wavelength selection around 475 nm.

    Product features：Blue‑light band selection at 475 nm；Main transmission band: 463.5–486.5 nm；Average transmission over the passband: Tavg > 92%；Typical FWHM bandwidth: 29.9 nm；Stable long-term optical performance

    Part Number：MP‑NBP‑475

    Application area：Fluorescence detection and imaging | Spectroscopy | Biomedical detection | Research laboratory optical setups

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    Main parameters
  • Core parameters

  • Laser Wavelength Transmission Band

    475 nm Tavg > 90% 410 – 420 nm

  • Dimension Drawing
    • General Parameters

    Specification

    Value

    Transmission Band

    Tavg > 90%  410 – 420 nm

    Blocking Band

    ODavg > 4  200 – 275 nm

    Blocking Band

    ODavg > 4  275 – 399 nm

    Blocking Band

    OD > 3.5  450 nm

    Blocking Band

    OD > 3.5  494 nm

    Blocking Band

    ODavg > 5  500 – 950 nm

    FWHM Bandwidth

    29.9nm

    Guaranteed Minimum Bandwidth

    23

    Angle of Incidence

    0 ± 5°

    Cone Half-angle

    7°

    Clear Aperture

    ≥22mm

    Transverse Dimensions, Diameter

    25 mm

    Filter Thickness, Mounted

    3.5 mm

    Filter Thickness Tolerance, Mounted

    ±0.1mm

    Filter Thickness, Unmounted

    2.0 mm

    Filter Thickness Tolerance, Unmounted

    ±0.1mm

    Surface Quality (Scratch-Dig)

    60-40

    Filter Effective Index

    1.94

    Optical Damage Rating

    Testing has proven to show no signs of degradation when exposed to at least 6.0 W of power from an unfiltered xenon arc lamp over a 25 mm diameter (corresponding to 1.2 W/cm2) for over 500 hrs.

    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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  • Product title: 475 nm Narrow Bandpass Optical Filter
  • Product link: https://www.idealphotonics.com/product/detail/1706.html

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    • 10+ 10 Years of Experience
    • 50 50 + Countries Bussiness
    • 10000 10k + Diodes sold worldwide
    • 30 30+ Invention patent
    • 10 10+ Advanced Optical Solutions

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