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单词 focal plane
释义

WordReference Random House Unabridged Dictionary of American English © 2024
fo′cal plane′, [Optics.]
  1. Opticsa plane through a focal point and normal to the axis of a lens, mirror, or other optical system. Cf. principal plane.
  2. Opticsthe transverse plane in a telescope where the real image of a distant view is in focus.
  • 1890–95

Collins Concise English Dictionary © HarperCollins Publishers::
focal plane n
  1. the plane that is perpendicular to the axis of a lens or mirror and passes through the focal point
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更新时间：2025/2/23 14:46:13