| 释义 |
Abbe, n.2 Optics.|ˈæbə|
Also misspelt Abbé.
[The name of Ernst Abbe (1840–1905), German physicist, introducer or popularizer of the instruments and concepts.
The form Abbé (with pronunc. |ˈæbeɪ|) prob. arises from a misconception that the name is French.]
Used attrib. and in the possessive to designate optical instruments and concepts relating to optical theory, as Abbe condenser, a condenser for compound microscopes in the form of a wide-aperture compound lens; Abbe number, the reciprocal of the dispersive power of a substance; Abbe refractometer, an instrument for directly determining the refractive index of a small sample of liquid.
1882Jrnl. R. Microsc. Soc. II. 411 Abbe's Condenser.—This apparatus as originally devised was not easily applicable to any stand but that of Zeiss for which it was specially made. 1883Ibid. III. 581 Abbe's Refractometer. 1924R. A. Houston Treat. Light (rev. ed.) vii. 109 The Abbe refractometer is an instrument of this type. Such instruments are usually calibrated with liquids of known refractive index. 1937G. S. Monk Light vi. 65 It is customary for glass makers to give the value of 1/ω, sometimes called the Abbe number ν. 1937Discovery Jan. p. vii/1 Polariscopes, Abbe Condensers, etc. 1964N. G. Clark Mod. Org. Chem. iv. 49 This can be accomplished with the Abbé refractometer, an instrument designed to give a direct reading of the refractive index to four decimal places with speedy manipulation. 1973B. J. Ford Optical Microscope Man. iii. 53 We now call this form, as a rule, an Abbé condenser. 1988M. Pluta Adv. Light Microscopy I. i. 60 For many practical purposes some standard dispersion quantities are in use. Among them the most important are the mean dispersion..and the Abbe number. |