| 释义 |
ultraˈmicroscope
[f. ultra- 2 c + microscope n., or a back-formation from next.]
An optical microscope used to detect particles smaller than a wavelength of light by illuminating them at an angle, so that the light scattered by the particles (Tyndall scattering) can be observed against a dark background.
1906Jrnl. R. Microsc. Soc. 366 The ultramicroscope is adapted to the determination of the identity and purity of oils. 1927[see polydispersity s.v. polydisperse a.]. 1936Discovery Nov. 347/2 The ultramicroscope, which by specially illuminating fine particles so that they themselves shine with reflected light, makes them perceptible through an ordinary microscope when they would not otherwise be so. 1974Sci. Amer. May 88/2 We examined samples of oil in an ultramicroscope.
Hence ultramiˈcroscopy, the art or practice of using an ultramicroscope.
1906Jrnl. R. Microsc. Soc. 366 (heading) Ultramicroscopy of oleosole. 1910[see Tyndall]. 1961R. D. Baker Essential Path. i. 7 Advances in histochemistry and ultramicroscopy are increasing the scope of pathologic anatomy as an investigative science. |