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Bandpass Filters

Bandpass filters are characterized by a high transmitting band that is blocked in the subsequent long-wave and short-wave spectral range.

Depending on the spectral width of the transmitting band, a distinction is made between broadband and narrowband filters.

Bandpass filters can be manufactured with a variety of performance characteristics ranging from the simplest Fabry-Pérot design with a single cavity and unblocked to more complex, fully blocked dielectric designs with multiple cavities and a single substrate.


  • Spectroradiometry
  • Medical Diagnostics
  • Chemical analytics
  • Colorimetry
  • Astronomy
  • Areas where spectral separation is required


  • Use of hard, dielectric oxide layers
  • Wavelengths from UV, VISIBLE, NIR to FIR
  • Excellent blocking outside bandpass
  • Maximum possible transmission
  • Excellent temperature resistance
  • Excellent durability, even under demanding climatic conditions

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