Usually means: Optical interferometer for wavelength selection.
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We found 12 dictionaries that define the word etalon:

General (9 matching dictionaries)
  1. etalon: Merriam-Webster
  2. etalon: Oxford Learner's Dictionaries
  3. etalon: Collins English Dictionary
  4. etalon: Wiktionary
  5. etalon: Webster's New World College Dictionary, 4th Ed.
  6. etalon: Infoplease Dictionary
  7. etalon: Dictionary.com
  8. Etalon (satellite), Etalon: Wikipedia, the Free Encyclopedia
  9. etalon: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. etalon: Encyclopedia

Science (1 matching dictionary)
  1. Etalon: Extragalactic Astronomy

Tech (1 matching dictionary)
  1. etalon: Webster's New World Telecom Dictionary

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Definitions from Wiktionary (etalon)

▸ noun:  An optical device containing parallel mirrors, used as a narrow band filter, often in laser design.

Similar:
monochromator, beam splitter, fold mirror, slitmask, ion mirror, polychromator, filtercube, sun filter, optical telescope, altiscope, more...

Opposite:
non-standard, non-conforming, atypical, deviant

Types:
Fabry-Perot, more...

Adjectives:
nonlinear, single, second, solid, thick, thin, tilted, first, spherical, shorter, high

▸ Words similar to etalon

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▸ Wikipedia articles (New!)

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Similar:
monochromator, beam splitter, fold mirror, slitmask, ion mirror, polychromator, filtercube, sun filter, optical telescope, altiscope, more...

Opposite:
non-standard, non-conforming, atypical, deviant

Types:
Fabry-Perot, more...

Adjectives:
nonlinear, single, second, solid, thick, thin, tilted, first, spherical, shorter, high



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