An instrument for determining the degree of sensitivity of a photographic medium to the chemical action of light.
| 单词 | θ229747 |
| 释义 | society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [noun] > meters (8) photographometer1848 An instrument for determining the degree of sensitivity of a photographic medium to the chemical action of light. heliograph1851 An instrument for measuring the intensity of sunlight. actinometer1866 Photography. An apparatus by which light intensity (and hence an appropriate exposure time) can be estimated from the time taken for a piece of… sensitometer1880 An instrument used to measure the sensitivity of photographic film, plates, etc., to light or radiation. Frequently attributive. Cf. actinometer, n.… light meter1889 a device for measuring the intensity of light; esp. one that shows the correct exposure when taking a photograph (cf. exposure meter n. at exposure… exposure meter1891 The action of exposing; the fact or state of being exposed. Photography. The exposing of a sensitized surface to the action of actinic rays (see e… iconometer1894 (See quots.) extinction meter1931 a photographic exposure meter which gives readings in terms of visual comparisons. |
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