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单词 etalon
释义

Definition of etalon in English:

etalon

nounˈɛtəlɒnˈādlˌän
Physics

  • A device consisting of two reflecting glass plates, employed for measuring small differences in the wavelength of light using the interference it produces.

    Example sentencesExamples
    • The change in resonance frequency of the etalon measures the change in optical-path length.
    • We specialize in very large aperture etalons with diameters up to 150 mm.
    • Our products range from simple condenser lenses to precision etalons.

Origin

Early 20th century: from French étalon, literally 'standard of measurement'.

Definition of etalon in US English:

etalon

nounˈādlˌän
Physics

  • A device consisting of two reflecting glass plates, employed for measuring small differences in the wavelength of light using the interference it produces.

    Example sentencesExamples
    • We specialize in very large aperture etalons with diameters up to 150 mm.
    • Our products range from simple condenser lenses to precision etalons.
    • The change in resonance frequency of the etalon measures the change in optical-path length.

Origin

Early 20th century: from French étalon, literally ‘standard of measurement’.
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更新时间：2025/6/18 15:59:51