| 释义 |
telephote, n.|ˈtɛlɪfəʊt|
Also telephot.
[f. Gr. τῆλε afar, at a distance, tele- + ϕῶς, ϕωτ-, light.]
A name employed or proposed for various devices or apparatus used or projected: a. A means of transmitting signals or messages from a distance by means of light, (a) by flashing beams of light by a mirror (cf. heliograph); (b) by letting out flashes from a brilliant lamp by means of a moving shutter; (c) by using flashed beams to work a sensitive photo-electric receiving apparatus (cf. photophone). b. A device for the electric transmission of pictures, so that they are reproduced as pictures at a distance: cf. telephotograph1, telelectrograph in tele-. c. A projected or suggested device for the electrical transmission to a distance of visual images of things, persons, or actual scenes (cf. telelectroscope in tele-): not yet practically realized. d. An apparatus for photographing at a great distance; a telephotographic lens or camera: see telephotograph2.
1880[implied in telephote v.]. 1884Knight Dict. Mech. Supp., Telephote, an instrument or apparatus for conveying messages or images by transmission of light. 1889Scott. Leader 26 July 7 M. Courtonne..has deposited under seal his description of a new apparatus called a telephote, which enables one to see at a distance as the telephone enables one to hear at a distance. 1896Current Hist. (Buffalo, N.Y.) VI. 950 A ‘telephot’..invented by Dr. Robert d'Unger, of Chicago, Ill. [for picture telegraphy]. 1903Sci. American 27 June 486/1 (heading) The ‘Telephot’, a novel apparatus for photographing at great distances. Ibid. 486/2 The ‘Téléphot’ may, moreover, be, at a moment's notice, converted into a terrestrial or astronomical telescope.
Hence ˈtelephote v., to transmit an optical image to a distance by means of electricity. telephotic |-ˈfɒtɪk| a., of or pertaining to a telephote (actual or conceived), or to telephoty.
1880Engineering 7 May 361/2 Visual Telegraphy... An image of the object to be ‘telephoted’ is focussed on the mirror by means of a lens, and the resulting current started in each [selenium] square of the mirror by the portion of the image falling on it is transmitted by the corresponding wire to the distant station. 1889tr. Jules Verne in Tablet 16 Feb. 249/1 Each reporter..has in front of him a set of commutators which enable him to communicate with any desired telephotic line. 1896Flammarion in N. Amer. Rev. May 557 We need to be able to enter into telephotic communication with them [inhabitants of Mars]. |