| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,737,339,925 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
interference filter |
Also found in: Acronyms, Wikipedia | 0.04 sec. |
|
interference filter [‚in·tər′fir·əns ¦fil·tər] (electronics) A filter used to attenuate artificial interference signals entering a receiver through its power line. A filter used to attenuate unwanted carrier-frequency signals in the tuned circuits of a receiver. (optics) An optical filter in which the wavelengths that are not transmitted are removed by interference phenomena rather then by absorbtion or scattering. Interference filter An optical filter in which the wavelengths that are not transmitted are removed by interference phenomena rather than by absorption or scattering. In addition to being able to duplicate most of the spectral characteristics of absorption color filters, these devices can be made to transmit a very narrow band of wavelengths. They can thus be used as monochromators to examine a radiation source at the wavelength of a single spectrum line. For example, the solar disk can be observed in light of the hydrogen line Hα and thus the distribution of excited hydrogen over the disk can be determined. Most narrow-band interference filters are based on the Fabry-Perot interferometer. See Interference of waves, Interferometry How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
If you overtighten the light interference filter (LIF), NSN 5855-01-379-1410, you can crack the objective lens on you're AN/PVS-14 night vision device. Relying on the analogy that has been established between the passage of light waves through materials such as glass and the propagation of electrons as waves through semiconductors, researchers have now designed an interference filter not for light of a specified wavelength but for electrons with a certain energy. These patents cover the design of thermo-optically tunable thin-film interference filters and a fiber-optic enclosure for these filters based on the low-cost transistor outline (TO) assembly package. |
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|