Meaning Of The Word Exit pupil

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Exit pupil Meaning

Exit pupil Definition
Exit pupil Definition

What's The Definition Of Exit pupil?

exit pupil in American English
noun: the ridge of the entrance pupil of an optical system, indicating the place where the pupil of the eye should be placed to view the object

exit pupil in British English
noun: the smallest cross section of the beam of light from the eyepiece of a telescope through which all the light from the eyepiece passes. Its diameter is equal to the ratio of the focal length of the eyepiece to the focal ratio of the telescope

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