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单词 demagnify
释义

demagnifyv.

Etymology: < de- prefix 2a + magnify v.Previous versions of the OED give the stress as: deˈmagnify.
transitive. Of a lens, etc.: to make smaller. Also absol.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > lens > [verb (intransitive)] > make smaller
demagnify1960
the world > physical sensation > sight and vision > optical instruments > lens > [verb (transitive)] > make smaller
demagnify1960
1960 Sat. Rev. (U.S.) 2 Apr. 45/2 We can reverse the lenses of the electron microscope in order to demagnify rather [than] to magnify.
1963 L. S. Birks Electron Probe Microanal. iii. 26 The second lens further demagnifies the image and focuses the electron beam on the specimen surface.
1984 Electronics 23 Feb. 74/2 The ions shooting through the holes in the mask go through an ion optical-projection lens system that demagnifies the mask's ion image.

Derivatives

deˈmagnified adj.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > lens > [adjective] > made smaller
demagnified1963
1963 L. S. Birks Electron Probe Microanal. iii. 25 The first lens forms a demagnified real image of the hot filament.
deˈmagnifying adj.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > lens > [adjective] > types of lenses
convex?a1560
planoconvex1665
concavo-convex1677
convexo-concave1693
strong1732
aplanatic1799
periscopic1803
omphaloptic1819
polyzonal1823
shallow1837
first-order1846
periscopical1846
orthoscopic1853
rectilinear1874
overcorrected1875
sphero-cylindrical1881
wide-aperture1882
afocal1887
apochromatic1887
anastigmatic1890
telecentric1892
photovisual1899
aspherical1922
aspheric1923
multifocal1928
plano1944
demagnifying1959
1959 Jrnl. Sci. Instruments 36 350/1 The limit is set chiefly by the spherical aberration of the final demagnifying lens and the current density per unit solid angle..of the electron gun.
1976 Physics Bull. Sept. 397/3 A demagnifying image intensifier with an ultraviolet photocathode.
demagnifiˈcation n.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > lens > [noun] > making smaller
demagnification1959
1959 Jrnl. Sci. Instruments 36 352/1 The demagnification of the source takes place in two stages.
1963 L. S. Birks Electron Probe Microanal. iii. 26 The working distance is related to the focal length of the second lens and the demagnification required.
1984 Electronics 23 Feb. 73/3 Such 10X demagnification relaxes the accuracy needed in mask fabrication, so that masks can be made by common lithographic methods.
This entry has not yet been fully updated (first published 1989; most recently modified version published online June 2019).
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