negative principal planes

negative principal planes

[′neg·əd·iv ¦prin·sə·pəl ′plānz]
(optics)
Two planes perpendicular to the optical axis such that objects in one plane form images in the other with a lateral magnification of -1. Also known as antiprincipal planes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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