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

  • 1000 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1000-25
    $70.00
    6 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1000-25

    Cut-On Wavelength

    1000 nm

    Cut-On Wavelength (Range)

    901 – 1100 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

  • 1050 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1050-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1050-25

    Cut-On Wavelength

    1050 nm

    Cut-On Wavelength (Range)

    901 – 1100 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

  • 1100 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1100-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1100-25

  • 1150 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1150-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1150-25

    Cut-On Wavelength

    1150 nm

    Cut-On Wavelength (Range)

    1101 – 1300 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

  • 1200 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1200-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1200-25

    Cut-On Wavelength

    1200 nm

    Cut-On Wavelength (Range)

    1101 – 1300 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

  • 1250 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1250-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1250-25

    Cut-On Wavelength

    1250 nm

    Cut-On Wavelength (Range)

    1101 – 1300 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

  • 1300 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1300-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1300-25

    Cut-On Wavelength

    1300 nm

    Cut-On Wavelength (Range)

    1101 – 1300 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

  • 1350 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1350-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1350-25

    Cut-On Wavelength

    1350 nm

    Cut-On Wavelength (Range)

    1301 – 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

  • 1400 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1400-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1400-25

    Cut-On Wavelength

    1400 nm

    Cut-On Wavelength (Range)

    1301 – 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

  • 1450 nm Long Pass, 25 mm Dia.

    Curve
    Typical Long Pass Filter Curve
    LP-1450-25
    $70.00
    5 in stock
    Add to cart

    Long Pass Filter Specifications | LP-1450-25

    Cut-On Wavelength

    1450 nm

    Cut-On Wavelength (Range)

    1301 – 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

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