Medical Definition of Entrance pupil
1.
The apparent size of the limiting aperture of a lens or lens system (properly that of the diaphragm), as seen from the object plane. This can shift and become a complex matter in some circumstances. In a properly set up microscope system it should be that of the substage iris diaphragm.
(05 Aug 1998)
Lexicographical Neighbors of Entrance Pupil
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