Emission Line Filters

Emission Line Filters

Emission Line Filters

Emission Line Filters from Andover Corporation are precision-engineered narrowband filters designed to isolate specific spectral lines emitted by gases, elements, and laser sources. These filters deliver ultra-narrow bandwidths with steep edges and high transmission, optimized for applications where selectivity and signal-to-noise ratio are critical.

We offer a wide range of emission line filters targeting lines such as H-Alpha, H-Beta, HeNe, Kr, Ar, Na, Rb, and Hg, as well as common laser sources including Nd:YAG, Ruby, GaAs, HeCd, and N2.

Additional filters are available for specialized sources like methane, biomedical fluorescence, LED, Sapphire, and NaYAG. Each filter is manufactured in-house for precision center wavelength control, OD3+ blocking, and consistent spectral performance.

Standard filter sizes and custom configurations are available upon request.

  • Ultra-narrow bandwidths for precise spectral isolation
  • High transmission at target wavelength with OD3+ blocking outside the passband
  • Engineered for use with laser sources, gas emissions, and elemental lines
  • In-house manufacturing ensures tight CWL tolerances and thermal stability
  • Available in standard and custom sizes and mounting options
  • Laser-based sensing and targeting
  • Fluorescence and biomedical imaging (e.g., Biomed, LED, Sapphire)
  • Spectroscopy and plasma diagnostics
  • Astronomical observation of emission lines (e.g., H-alpha, H-beta)
  • Industrial gas monitoring (e.g., Methane, Argon, N₂)
  • Center Wavelengths: Specific to each emission line (e.g., 656.3 nm for H-alpha)
  • Bandwidths: Ultra-narrow FWHM (typically 1–10 nm)
  • Blocking: OD3 or greater out-of-band
  • Substrate Options: Fused silica or other materials as required
  • Size Options: Standard diameters and custom shapes upon request
    PART NO.
    DESCRIPTION
    1 - 5 pcs.
    6 - 10 pcs.
    > 10 pcs.
    Stock Status

    214FS10-12.5

    214nm Bandpass Filter, FWHM 10nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock

    214FS10-25

    214nm Bandpass Filter, FWHM 10nm, 25mm dia.

    $348.00
    $282.00
    $247.00
    In Stock

    214FS10-50

    214nm Bandpass Filter, FWHM 10nm, 50mm dia.

    $579.00
    $469.00
    $411.00
    In Stock

    214FS22-12.5

    214nm Bandpass Filter, FWHM 22nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock

    214FS22-25

    214nm Bandpass Filter, FWHM 22nm, 25mm dia.

    $348.00
    $282.00
    $247.00
    In Stock

    214FS22-50

    214nm Bandpass Filter, FWHM 22nm, 50mm dia.

    $579.00
    $469.00
    $411.00
    In Stock

    228FS10-12.5

    228nm Bandpass Filter, FWHM 10nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock

    228FS10-25

    228nm Bandpass Filter, FWHM 10nm, 25mm dia.

    $348.00
    $282.00
    $247.00
    In Stock

    228FS10-50

    228nm Bandpass Filter, FWHM 10nm, 50mm dia.

    $579.00
    $469.00
    $411.00
    In Stock

    228FS25-12.5

    228nm Bandpass Filter, FWHM 25nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock

    228FS25-25

    228nm Bandpass Filter, FWHM 25nm, 25mm dia.

    $348.00
    $282.00
    $247.00
    In Stock

    228FS25-50

    228nm Bandpass Filter, FWHM 25nm, 50mm dia.

    $579.00
    $469.00
    $411.00
    In Stock

    232FS10-12.5

    232nm Bandpass Filter, FWHM 10nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock

    232FS10-25

    232nm Bandpass Filter, FWHM 10nm, 25mm dia.

    $348.00
    $282.00
    $247.00
    In Stock

    232FS10-50

    232nm Bandpass Filter, FWHM 10nm, 50mm dia.

    $579.00
    $469.00
    $411.00
    In Stock

    239FS10-12.5

    239nm Bandpass Filter, FWHM 10nm, 12.5mm dia.

    $178.00
    $144.00
    $126.00
    In Stock