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An optical table is a platform that is used to support systems used for optics experiments and engineering. The surfaces of these tables are designed to be very rigid so that the alignment of optical elements remains stable over time. Many optical systems require that vibration of optical elements be kept small. As a result, optical tables are typically very heavy and incorporate vibration-damping features in their structure. Many use pneumatic bearings that act as a low-pass filter to vibrations, preventing high-frequency vibrations in the floor from reaching the tabletop.〔(【引用サイトリンク】title=The need for optical tables )〕 The surface of an optical table is typically stainless steel with a rectangular grid of tapped holes in either metric or imperial units: * metric: M6 on a 25 mm grid * imperial: ¼-20" UNC on a 1" (25.4 mm) grid Optical breadboards, benches, and rails are simpler structures that perform a similar function to optical tables. These are used in teaching and in research and development, and are also sometimes used to support permanently aligned optical systems in finished devices. ==Explanation== In optical systems, especially those involving interferometry, the alignment of each component must be extremely accurate—precise down to a fraction of a wavelength—usually a few hundred nanometers. Even small vibrations or strain in the table on which the elements are set up might lead to complete failure of an experiment. Hence, one requires an extremely rigid table which neither moves nor flexes, even under changing loads or vibrations. The surface of the table must also be quite flat, to allow precision optical mounts to make good contact with the table without rocking and facilitate easy assembly of the optical system. 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「Optical table」の詳細全文を読む スポンサード リンク
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