| 单词 | flicker photometer |
| 释义 | > as lemmasflicker photometer flicker photometer n. an instrument for measuring the relative intensities of light from two different sources, esp. sources of different colours, by measuring the flicker or observing the absence of flicker when the field of view is illuminated alternately by the two sources of light. 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 1896 F. P. Whitman in Physical Rev. 3 241 (heading) On the photometry of differently colored lights and the ‘flicker’ photometer. 1955 J. W. Wentworth Color Television Engin. iii. 59 The best instrument for measuring the luminances of ‘colored’ surfaces is the flicker photometer. < as lemmas |
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