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词汇 Ramsden circle
释义

Definition of Ramsden circle in English:

Ramsden circle

noun
Optics
  • The exit pupil of a telescope or microscope; the circle of least diameter of the bundle of rays leaving the eyepiece.

Origin

Late 19th century.

Definition of Ramsden circle in US English:

Ramsden circle

noun
Optics
  • The exit pupil of a telescope or microscope; the circle of least diameter of the bundle of rays leaving the eyepiece.

Origin

Late 19th century.

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