Transmission curve


The transmission curve or transmission characteristic[1] is the mathematical function or graph that describes the transmission fraction of an optical or electronic filter as a function of frequency or wavelength.[2] It is an instance of a transfer function but, unlike the case of, for example, an amplifier, output never exceeds input (maximum transmission is 100%). The term is often used in commerce,[3] science,[4] and technology[5] to characterise filters.

The term has also long been used in fields such as geophysics and astronomy to characterise the properties of regions through which radiation passes, such as the ionosphere.[6][7]

See also


  1. ^ Arndt, F. and Saulich, G. (1979), Microwave filters with nonperiodic transmission characteristic. Int. J. Circ. Theor. Appl., 7: 87–96. doi: 10.1002/cta.4490070110
  2. ^ Introduction to Spectrophotometry, PowerPoint presentation, slide 16 and the Notes for it,[permanent dead link]
  3. ^ "Schneider, Transmission Curves of B+W Filters" (PDF). Archived from the original (PDF) on 2011-10-11. Retrieved 2011-10-04.
  4. ^ Manastash Ridge Observatory "show the transmission curves for our Sloan filters"
  5. ^ IEEE: Research on curve fitting of transmission T of 2D photonic crystal microcavity: "It is found that the calculated transmission curve fits the Lorentz function"
  6. ^ The Relation of Radio Sky-Wave Transmission to Ionosphere Measurements, N Smith, Proceedings of the I.R.E., May 1939; discusses linear and logarithmic transmission curves of the ionosphere
  7. ^ Radiation transmission data for radionuclides and materials relevant to brachytherapy facility shielding, P. Papagiannis et al., 2008, American Association of Physicists in Medicine. DOI:10.1118/1.2986153 [1][permanent dead link]. Discusses and calculates transmission curves related with screening of clinical equipment generating ionising radiation.