Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

bandpass filter




full width at half maximum
A filter that transmits a continuous range (band) of wavelengths but reflects or absorbs wavelengths above and below this range. Bandpass filters are specified by the full width at half maximum (FWHM) of their transmission peak: wideband (greater than 60 nm FWHM), medium band (20 to 60 nm FWHM), and narrowband (less than 20 nm FWHM).


Related categories

   • ELECTRONICS AND SEMICONDUCTORS
   • RADIO ASTRONOMY AND COMMUNICATIONS