| 释义 |
heliography|hiːlɪˈɒgrəfɪ|
[f. helio- + -graphy. Cf. F. héliographie.]
1. The description of the sun. (Cf. geography.)
1730–6Bailey (folio), Heliography, a Description of the Sun. 1798C. Palmer (title) A Treatise on the Sublime Science of Heliography satisfactorily demonstrating our great orb of light, the sun, to be absolutely no other than a body of Ice! 1867–77G. F. Chambers Astron. vii. vii. 712 So much useful work has been done in heliography.
†2. The process or art of obtaining permanent images of objects by the chemical action of light on prepared surfaces; photography. Obs.
1840Penny Cycl. XVIII. 113 s.v. Photogenic Drawings, Such apparatus is named after its inventor the Daguerrotype, and the process itself either photogeny, photography, or heliography (sun-drawing). 1840(title) Handbook of Heliography.
3. Name of a process of engraving in which a specially prepared plate is acted upon chemically by exposure to light.
1845Athenæum 22 Feb. 202 The process by which these pictures were procured, called by its discoverer Heliography. 1875tr. Vogel's Chem. Light i. 10 One of the finest applications of photography, that of heliography, or the combination of photography with copper-plate printing. 1880Daily News 2 Dec. 5/2 Heliography, it seems, makes no impression on the paper as types do.
4. The system of signalling by means of the heliograph (sense 4).
1887Advance (Chicago) 10 Nov. 718 Heliography is a sort of telegraphic system of communication by means of flashes of sunlight reflected from mirrors. |