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    • 825nm Short-Pass Dichroic Filter

    The MP-DF-825 is an imaging dichroic filter with a cut-on edge wavelength of 825 nm, primarily designed for separating visible and near-infrared light. At 45°angle of incidence, the filter efficiently transmits visible light from 565 nm to 800 nm and reflects near-infrared light from 850 nm to 1650 nm. With a standard spectral edge profile suitable for fluorescence systems and controlled reflected wavefront error, it is ideal for optical systems requiring image splitting, dual-channel imaging, and combined visible-NIR detection.

    Product features：Average transmission > 90% from 565 nm to 800 nm；Broadband NIR reflection from 850 nm to 1650 nm；Spectral edge wavelength at 825 nm；Optimized for 45° angle‑of‑incidence optical paths；High environmental stability and long service life；Suitable for visible and NIR dual‑band imaging systems

    Part Number：MP-DF-825

    Application area：Visible and NIR image splitting | Dual-channel fluorescence imaging | Multispectral imaging systems | Spectral analysis instruments | Research and experimental equipment

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    Main parameters
  • Core parameters

  • Edge Wavelength Transmission Band Reflection Band

    825 nm 565–800 nm，Tavg >90% 850–1650 nm

  • Dimension Drawing
    • General Parameters

    Specification

    Value

    Transmission Band

    Tavg > 90%  565 – 800 nm

    Reflection Band

    850 – 1650 nm

    Edge Steepness

    Standard (for Fluorescence)

    Edge Wavelength

    825nm

    Angle of Incidence

    45 ± 1.5 °

    Cone Half-angle

    2°

    Flatness / RWE Classification

    Image-splitting

    Reflected Wavefront Error

    < 2λ P-V RWE @ 632.8

    Clear Aperture

    ≥ 80% (elliptical)

    Transverse Dimensions, LxW

    25.2 mm x 35.6 mm

    Filter Thickness, Unmounted

    2.0mm

    Filter Thickness Tolerance, Unmounted

    ± 0.1mm

    Surface Quality (Scratch-Dig)

    60-40

    Filter Effective Index

    1.80

    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

    Reflective surface marked with part-Orient in incoming 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: 825nm Short-Pass Dichroic Filter
  • Product link: https://www.idealphotonics.com/product/detail/1724.html

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      • Other Requirements:

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