单词 | maksutov–cassegrain |
释义 | Maksutov–Cassegrainn. Astronomy. A Maksutov–Cassegrain telescope or camera, having a deeply curved meniscus lens as a correcting plate and incorporating a small secondary mirror which reflects light back through a hole in the primary mirror. See Maksutov n., Cassegrain at Cassegrainian adj. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instrument for distant vision > [noun] > telescope > astronomical telescopes stellascope1661 Schmidt camera1934 Schmidt1939 Maksutov–Cassegrain1958 Maksutov1970 Nasmyth–Cassegrain1972 Schmidt telescope1978 Dobsonian1980 1958 C. Frank Bk. of Telescope xiv. 108 With a small central mirror attached to the inner surface of the meniscus a Maksutov/Cassegrain results. 1964 Sky & Telescope Mar. 180/2 My first venture into catadioptric telescope was making a 6-inch f/15 Maksutov-Cassegrain of John Gregory's design. 1998 Sky & Telescope (Nexis) Mar. 55 I homed in on the correct speed by monitoring the tracking with a small telescope (a Celestron C90 Maksutov–Cassegrain) attached to the mount instead of a camera. Compounds attributive. Designating or relating to such a telescope or camera. ΚΠ 1961 Jrnl. Optical Soc. Amer. 51 359 (title) Flat-fielded Maksutov-Cassegrain optical systems. 1971 Monthly Notices Royal Astron. Soc. 153 270 In the Maksutov-Cassegrain camera described above, the expedient of thickening the meniscus..has been carried out as far as is possible. 1998 Mod. Astronomer Mar. 21/2 (advt.) Maksutov–Cassegrain telescope for use as a high light gathering astronomical scope, a compact terrestrial scope or a fast 500mm mirror lens with a T2 adaptor. This is a new entry (OED Third Edition, June 2000; most recently modified version published online March 2022). < n.1958 |
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