| 单词 | guiding telescope |
| 释义 | > as lemmasguiding telescope guiding telescope n. a visual telescope fixed rigidly to a photographic telescope so that the latter may be ‘guided’ manually to follow the course of a star, etc., kept under observation during an exposure. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > telescope > other telescopes polemoscope1668 finder1738 night-glass1758 collimator1825 floating collimator1833 lookdown1865 guiding telescope1897 autocollimator1903 kinetheodolite1941 finderscope1946 satellite telescope1951 scotoscope1964 starlight scope1964 1897 A. H. Miles Concise Knowl. Astron. ii. xv. 195 In the guiding telescope are two spider threads at right angles to each other, and it is by constantly keeping the image of a star at the intersection of these ‘wires’ that the operator ensures the images remaining in a constant position upon the sensitive plate. 1945 G. Z. Dimitroff & J. G. Baker Telescopes & Accessories vii. 252 It is not advisable to use as a guiding telescope one whose aperture is less than one half of that used in the photographic telescope. 1959 T. Rackham Astron. Photogr. at Telescope iv. 68 It has long been the custom to mount a short focal length wide aperture camera on a larger telescope of greater focal length and, using the latter as a guiding telescope, make long exposures at the night sky. 1959 Listener 22 Jan. 162/1 The 50-inch reflector does not possess a separate guiding telescope. < as lemmas |
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