orthoscopic eyepiece
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orthoscopic eyepiece
(or-thŏ-skop -ik) See eyepiece.Collins Dictionary of Astronomy © Market House Books Ltd, 2006
orthoscopic eyepiece
[¦ȯr·thə¦skäp·ik ′ī‚pēs] (optics)
An eyepiece that consists of a single lens, made up of three cemented elements, to which a planoconvex lens is added; designed to minimize distortion and spherical aberration.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.