“focuser”的英文意思_释义_用法

单词

focuser

释义

focuser|ˈfəʊkəsə(r)|
[f. focus v. + -er¹.]
1. A focusing-glass.
1890Woodbury Encycl. Photogr. s.v. Focussing Glass.
2. An electrostatic or magnetic device for focusing particles.
1954Physical Rev. 2nd Ser. XCV. 284/1 Some selection of rotational states could be effected by such a focuser. Similarly, a focuser using magnetic fields would allow spectroscopy of atoms.1958Sci. News L. 60 The stream of molecules..passes through the focuser, which consists of four cylindrical electrodes... Those in the higher of the two energy states are deflected toward the axis of the focuser.1963G. Troup Masers & Lasers (ed. 2) viii. 120 An electrostatic focuser and state separator..was used to provide a beam of excited molecules.

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