Long Pass Filters

Long Pass Filters

Typical long pass filter curveA Long Pass Filter or Long Wave Pass filter (“LP”) is one that transmits at longer wavelengths and rejects shorter wavelengths. By design, the transition in a long pass filter between the 50% cut-on to rejection is quite sharp. This makes it much easier to separate excitation from emitted wavelengths without interfering with wavelengths of interest. Long pass 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
  • Elimination of unwanted radiation
  • In spectroscopy
  • As order sorting filters
  • In astronomical applications
  • In laser-induced fluorescence to isolate source radiation.

  • A standard Long Pass filter available every 50 nm from 500 nm to 1500 nm
  • Mounted in a black anodized aluminium ring.
  • Use in combination with short pass filters for custom bandpass filtering
  • Fine tune cut-on wavelengths by changing angle of incidence

Product SKUs

  • 1500 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1500-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1500-25

    Cut-On Wavelength

    1500 nm

    Cut-On Tolerance

    ±15 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    70%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    1301 – 1500 nm

  • 400 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-400-25
    $70.00
    4 in stock
    Add to cart
  • 450 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-450-25
    $70.00
    5 in stock
    Add to cart
  • 500 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-500-25
    $70.00
    8 in stock
    Add to cart

    Long Pass Filter Specifications | LP-500-25

    Cut-On Wavelength

    500 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    80%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    400 – 500 nm

  • 550 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-550-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-550-25

    Cut-On Wavelength

    550 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    80%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    501 – 700 nm

  • 600 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-600-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-600-25

    Cut-On Wavelength

    600 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    80%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    501 – 700 nm

  • 650 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-650-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-650-25

    Cut-On Wavelength

    650 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    80%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    501 – 700 nm

  • 700 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-700-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-700-25

    Cut-On Wavelength

    700 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    80%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    501 – 700 nm

  • 750 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-750-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-750-25

    Cut-On Wavelength

    750 nm

    Cut-On Tolerance

    ±3 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    75%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    701 – 900 nm

  • 800 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-800-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-800-25

    Cut-On Wavelength

    800 nm

    Cut-On Tolerance

    ±15 nm

    Transmission Region

    Cut-on λ to 2.2 µ minimum

    Minimum Peak Transmission

    75%

    Slope (OD 0.3 to 4.0)

    3%

    Blocking

    10-4 Int. Min. / 10-5 Int. Avg.

    Blocking Range

    200 nm-Cut On λ

    Size (mm)

    25 mm dia.

    Size Tolerance

    +0.0/-0.2 mm

    Thickness

    6.3 mm

    Thickness Tolerance

    +0.0/-0.2 mm

    Scratch/Dig

    80/50

    Clear Aperture

    21 mm

    Mount

    Aluminum, Black Anodized

    Operating Temperature Range

    -20⁰ C to 75⁰ C

    Cut-On Wavelength (Range)

    701 – 900 nm

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