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词汇 optical flat
释义

Definition of optical flat in English:

optical flat

noun

  • A block or lamina (usually of glass) with one or more surfaces made accurately plane and smooth, any unevenness or departure from a perfect plane being small compared with the wavelength of light.

Origin

Late 19th century; earliest use found in Astrophysical Journal.

Definition of optical flat in US English:

optical flat

noun

  • A block or lamina (usually of glass) with one or more surfaces made accurately plane and smooth, any unevenness or departure from a perfect plane being small compared with the wavelength of light.

Origin

Late 19th century; earliest use found in Astrophysical Journal.
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