| 单词 |
eucentric |
| 释义 |
eucentric, a. Microscopy.|juːˈsɛntrɪk|
[f. eu- + -centric.]
Of the stage of an electron microscope: constructed in such a way that the field of view and the focus of the image remain unchanged when the specimen plane is tilted.
1973Physics Bull. June 367 A eucentric stage ensures that the specimen area under the electron beam does not shift when the specimen is tilted or rotated. 1976G. A. Meek Pract. Electron Microscopy for Biologists (ed. 2) xi. 270 All these disadvantages can be overcome by the use of a so-called ‘eucentric’ tilting stage, in which the axis of tilt always intersects the electron optical axis. 1979Nature 23 Aug. p. xx/2 The specimen chamber is large and contains two separate stages—a eucentric one for 20-mm working distance and one to accommodate large specimens up to 5 in. diameter at 48-mm working distance. 1988Ibid. 1 Sept. 98/3 Zeiss developed a new motorized six-axis stage for the CSM950, with features such as a 120 mm × 120 mm travelled range and a velocity of 30 mm per second. |
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