Shortpass Filters with Transmission Region Cut-off λ to 525 nm

Short pass filter spectral curveShortpass Filter

A shortpass filter or short wavepass filter (SP filter) is a filter that transmits at shorter wavelengths and rejects longer wavelengths. By design, the transition in a shortpass filter between the 50% cut-off or cut-on to rejection is quite sharp. This makes it much easier to separate excitation from emitted wavelengths without interfering with wavelengths of interest. Shortpass filters are useful in applications where spectral noise reduction is important or for isolating a particular region of the spectrum.

  • Emission filters in fluorescence applications
  • Eliminate unwanted radiation over ultraviolet, visible, or infrared
  • Ideal for Raman spectroscopy
  • Order sorting filters
  • Astronomy applications to study IR radiation without visible light
  • Laser-induced fluorescence to isolate source radiation

  • Available every 50nm from 450nm to 1000nm
  • Mounted in a black anodized aluminium ring
  • Use in combination with longpass filters for custom bandpass filtering
  • Fine tune cut-on wavelengths by changing angle of incidence

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Product SKUs

  • 750 nm Short Pass, 25.4 mm Dia.

    Typical Short Pass Filter Curve
    5 in stock
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    Short Pass Filter Specifications | SP-750-25

    Cut-Off Wavelength

    750 nm

    Cut-Off Wavelength (Range)

    701 – 899 nm

    Cut-Off Tolerance

    ±3 nm

    Transmission Region

    Cut-off λ to 525 nm

    Minimum Peak Transmission


    Slope (OD 0.3 to 4.0)

    ≤ 5%


    10-4 Min. / 10-5 Avg. to 975 nm

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm


    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm



    Clear Aperture

    21 mm


    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

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