| 单词 |
photochronograph |
| 释义 |
photochronograph|fəʊtəʊˈkrɒnəgrɑːf, -æ-|
[f. photo- + chronograph, or (in a.) from the Gr. elements of this.]
a. An instrument for taking a series of instantaneous photographs at regular short intervals of time; also, each of the photographs so taken.
b. An instrument by which a beam of light is caused to produce a photographic image at some precise instant of time, e.g. so as to show the exact time at which a star crosses the meridian. So ˌphotochronoˈgraphic a., pertaining to photochronography; ˌphotochronoˈgraphically adv., by means of photochronography; ˌphotochroˈnography |-krəʊˈnɒgrəfɪ|, the art or process of taking instantaneous photographs at regular intervals (see a. above).
1887Nature 15 Sept. 480/1 Photochronography applied to the dynamic problem of the flight of birds, by M. Marey. Ibid., On the photochronograph are measured all the displacements of the mass of the bird on the wing, together with the velocity of these movements. 1891Pall Mall G. 13 July 6/3 The photo-chronograph..causes a star to record the time of its own transit across the meridian. 1892Ibid. 14 Oct. 5/1 The Jesuit Father Fargis,..the inventor of the photochronograph for measuring star transits. 1897Westm. Gaz. 19 May 6/2 At the receiving end the polarising photochronograph of Lieutenant Squier and Professor Crehore completes the work, allowing a beam of light to register itself on a rapidly revolving sensitive plate. |
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