parfocalizev.
/pɑːˈfəʊkəlʌɪz/, /pɑːˈfəʊkl̩ʌɪz/, U.S. /pɑrˈfoʊkəˌlaɪz/ Optics.
transitive. To make (lenses or a lens system) parfocal.
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the world > physical sensation > sight and vision > optical instruments > lens > [verb (transitive)] > make parfocal
parfocalize1921
1921 Science 23 Oct. 5a (advt.) Objectives and condensers are so par-focalized to each other that..the focus once obtained will remain in adjustment.
1965 J. R. Benford in R. Kingslake Appl. Optics & Optical Engin. III. iv. 165 The second adjustment is to parfocalize the objective.
1982 Jena Rev. 27 41/1 Microscopic objectives of lowest magnification known so far..are either not parfocalized with the remaining microscope objectives or have the drawback that wide-field imaging is not possible.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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