| 释义 |
deˈmagnify, v.
[f. de- II. 1 + magnify v.]
trans. Of a lens, etc.: to make smaller. Also absol.
1960Sat. Rev. Lit. (U.S.) 2 Apr. 45/2 We can reverse the lenses of the electron microscope in order to demagnify rather [than] to magnify. 1963L. S. Birks Electron Probe Microanalysis iii. 26 The second lens further demagnifies the image and focuses the electron beam on the specimen surface. 1984Electronics 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.
Hence deˈmagnified, deˈmagnifying ppl. adjs.; also demagnifiˈcation.
1959Jrnl. Sci. Instruments XXXVI. 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. Ibid. 352/1 The demagnification of the source takes place in two stages. 1963L. S. Birks Electron Probe Microanalysis iii. 25 The first lens forms a demagnified real image of the hot filament. Ibid. 26 The working distance is related to the focal length of the second lens and the demagnification required. 1976Physics Bull. Sept. 397/3 A demagnifying image intensifier with an ultraviolet photocathode. 1984Electronics 23 Feb. 73/3 Such 10X demagnification relaxes the accuracy needed in mask fabrication, so that masks can be made by common lithographic methods. |