翻訳と辞書 Words near each other ・ Primary Inversion ・ Primary isolate ・ Primary juvenile glaucoma ・ Primary labor market ・ Primary lateral sclerosis ・ Primary Life Support System ・ Primary line constants ・ Primary lymphedema ・ Primary market ・ Primary Marksmanship Instructor ・ Primary Mathematics World Contest ・ Primary mediastinal (thymic) large B cell lymphoma ・ Primary mediastinal B-cell lymphoma ・ Primary metabolite ・ Primary metaphor ・ Primary mirror ・ Primary Motive ・ Primary motor cortex ・ Primary Music ・ Primary National Strategy ・ Primary NFL television stations ・ Primary nursing ・ Primary nutritional groups ・ Primary olfactory cortex ・ Primary ovarian insufficiency ・ Primary palate ・ Primary peritoneal carcinoma ・ Primary Phase ・ Primary physical custody ・ Primary polydipsia Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Primary mirror ： ウィキペディア英語版 Primary mirror A primary mirror (or primary) is the principal light-gathering surface (the objective) of a reflecting telescope. ==Description== The primary mirror of a reflecting telescope is a spherical or parabolic shaped disks of polished reflective metal (speculum metal up to the mid 19th century), or in later telescopes, glass or other material coated with a reflective layer. One of the first known reflecting telescopes, Newton's reflector of 1668, used a 3.3 cm polished metal primary mirror. The next major change was to use silver on glass rather than metal, in the 19th century such was with the Crossley reflector. This was changed to vacuum deposited aluminum on glass, used on the 200-inch Hale telescope. Solid primary mirrors have to sustain their own weight and not deform under gravity, which limits the maximum size for a single piece primary mirror. Segmented mirror configurations are used to get around the size limitation on single primary mirrors. For example, the Giant Magellan Telescope will have seven 8.4 meter primary mirrors, with the resolving power equivalent to a optical aperture. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Primary mirror」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.