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Longwave Pass Optical Thin Film Filters

  • Longpass High Precision
  • Longwave pass
Longpass High Precision
Longwave pass

Long pass Filters separate wavelength regions by reflecting the shorter wavelengths whilst transmitting longer wavelengths. Both portions of light can be utilised. The position of the filter is defined by the transition or ‘half power’ wavelength.

The width of the transmission and reflection zones can be specified independently as can the steepness of the transition edge between these regions. Different angles can be accommodated as can polarisation splitting. Very steep edges with low ripple and high %T utilise sophisticated designs with many layers. Such filters are available for the 300-8000nm region in a large variety of formats.

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Latest News

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    3rd May 2022
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    4th April 2022

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Envin Scientific Limited,
Technology House,
Chowley Oak, Tattenhall
Chester, Cheshire
CH3 9GA

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