| 释义 |
densitometer Photogr.|dɛnsɪˈtɒmɪtə(r)|
[f. density 4 + -ometer.]
An instrument for the measurement of photographic density.
1901Camera Mag. 23 Oct. 14 The idea at the root of the ‘Densitometer’ is that if it is possible to ascertain the density of a negative in a uniform and accurate manner the difficulties of bromide printing are at once overcome. 1955Gloss. Terms Radiology (B.S.I.) 54 Densitometer, an instrument for measuring photographic transmission and/or reflection density. 1959New Scientist 27 Aug. 283/1 The density of photographic emulsions must be accurately controlled in order to achieve the best results in colour printing. Normally this quantity is measured by means of a densitometer which successively views selected points of the image, producing a value for each position. 1961Printing News 16 Feb. 9 Densitometers—particularly of the reflection type—will not always agree on a numerical value for density. |