| 单词 | total reflectometer |
| 释义 | > as lemmastotal reflectometer 1. In full total reflectometer. An instrument for determining the refractive index of a transparent solid (or liquid) by measuring the critical angle for total reflection. Also in extended use. Now rare. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instruments for measuring > [noun] > light or radiation phaometer1747 photometer1779 diaphanometer1789 lucimeter1825 refractometer1842 Abbe refractometer1876 dietheroscope1877 reflectometer1879 radiomicrometer1887 holophotometer1888 flicker photometer1896 microphotometer1899 diffractometer1909 spot meter1952 photopolarimeter1971 the world > matter > physics > electromagnetic radiation > light > reflection > [noun] > instrument Fresnel's rhomb1835 Fresnel('s) mirror or mirrors1874 reflectometer1879 gloss-meter1930 Brewster window1965 the world > matter > physics > electromagnetic radiation > light > refraction > [noun] > index of refraction > measurement of indices > instrument for spectrometer1874 reflectometer1879 transmissometer1955 1879 Mineral. Mag. & Jrnl. Mineral. Soc. 2 57 The angle of total reflection is determined by means of a small instrument named a ‘Total-reflectometer’. 1898 E. W. Streeter Precious Stones & Gems (ed. 6) 315 An instrument called a Reflectometer has been introduced for the purpose of readily ascertaining the refractive index. 1935 Sci. Abstr. A. 38 1223 (heading) Ultrasonic total reflectometer to measure speed of sound and elastic constants of solids. 1966 R. Webster Pract. Gemmol. (ed. 4) vii. 63 Of prime important to the gemmologist is the method whereby use is made of a special optical instrument termed a refractometer, or, as it is sometimes called, a total reflectometer. < as lemmas |
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