Bandpass Filters with FWHM 40 nm

Bandpass Filters

A bandpass filter is an inexpensive optical filter used as a wavelength selector that allows transmission of a predetermined wavelength while rejecting or blocking other wavelengths. Along with our wide selection of standard infrared filters, Optometrics designs and manufactures custom bandpass filters for instrument manufacturers world wide.

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  • Clinical chemistry instrumentation
  • Spectral radiometry
  • Environmental testing
  • Colorimetry
  • Elemental and laser line separation
  • Flame photometry
  • Color separation
  • Fluorescence
  • Immunoassays

Bandpass Filter Terminology

Transmission Curves are graphs or mathematical functions that characterize optical filters. Typically expressed as the percent or fraction of light transmitted versus wavelength.

  • Bandwidth is a range of wavelength that specifies the transmitted part of the spectrum.
  • Central Wavelength (CWL) is the midpoint wavelength of the bandwidth.
  • Peak Transmittance is the maximum percentage of light transmission through the filter. It is often centered at the CWL, but many filters have fairly flat transmittance across the bandwidth.
  • Half Bandwidth (HBW) or Full Width-Half Maximium (FWHM) is the wavelength range that characterizes a bandpass filter. It is bound by the wavelengths where transmittance is half (50%) that of the peak transmission.
  • Upper and Lower Blocking Regions are the ranges of wavelengths where the light is attenuated.

Product SKUs

  • 400 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-400-40-25
    $164.00
    9 in stock
    Add to cart

    Bandpass Filter Specifications | F-400-40-25

    CWL

    400 nm

    CWL (Range)

    400 – 499 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    40

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 450 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-450-40-25
    $95.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-450-40-25

    CWL

    450 nm

    CWL (Range)

    400 – 499 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    60

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 500 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-500-40-25
    $95.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-500-40-25

    CWL

    500 nm

    CWL (Range)

    500 – 599 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 600 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-600-40-25
    $95.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-600-40-25

    CWL

    600 nm

    CWL (Range)

    600 – 699 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 650 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-650-40-25
    $95.00
    9 in stock
    Add to cart

    Bandpass Filter Specifications | F-650-40-25

    CWL

    650 nm

    CWL (Range)

    600 – 699 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 700 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    Curve
    Chart showing the typical performance of F-700-40-25.
    F-700-40-25
    $109.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-700-40-25

    CWL

    700 nm

    CWL (Range)

    700 – 799 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 750 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    Curve
    Chart showing the typical performance of F-750-40-25.
    F-750-40-25
    $109.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-750-40-25

    CWL

    750 nm

    CWL (Range)

    700 – 799 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 800 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-800-40-25
    $109.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-800-40-25

    CWL

    800 nm

    CWL (Range)

    800 – 899 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 850 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-850-40-25
    $109.00
    10 in stock
    Add to cart

    Bandpass Filter Specifications | F-850-40-25

    CWL

    850 nm

    CWL (Range)

    800 – 899 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

  • 880 nm Bandpass Filter, 40 nm FWHM, 25.0 mm Dia.

    F-880-40-25
    $109.00
    5 in stock
    Add to cart

    Bandpass Filter Specifications | F-880-40-25

    CWL

    880 nm

    CWL (Range)

    800 – 899 nm

    CWL Tolerance

    ± 8 nm

    FWHM

    40 nm

    FWHM Tolerance

    ± 8 nm

    Minimum Peak Transmission

    70%

    Blocking

    ≥ 4 OD

    Blocking Range

    X-ray – 1200 nm

    Size (mm)

    25.0 mm dia.

    Size Tolerance

    +0, -0.1 mm

    Thickness

    7.5 mm

    Thickness Tolerance

    +0, -0.2 mm

    Clear Aperture

    21.0 mm

    Mount

    Aluminum, Black Anodized

    Ring Marking

    CWL, FWHM, Light Direction

    Specification Temperature

    23˚ C

    Operating Temperature Range

    -50° C to +70° C

    Humidity Resistance

    MIL-810-810E, Method 507.3, 5 Cycles

    Optical Quality

    Commercial

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