| 单词 | mirror scale |
| 释义 | > as lemmasmirror scale mirror scale n. a graduated scale provided with an adjacent mirror so that parallax errors may be avoided when taking readings. ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > graduated instruments > graduated scale > other scales tangent scale1859 mirror scale1889 Modulor1948 1889 Manufacturer & Builder Apr. 95/3 A system of right and left hand deflections of the mirror scale, of greater or less amplitude, constituted the alphabet. 1901 M. W. Travers Exper. Study Gases vi. 56 The mirror scale (Jolly).—In reading barometers, manometers, etc., it is usual to employ a glass scale ruled in millimetres. The scale is etched on the surface of a strip of glass about 5 mm. in thickness, which is then silvered on the second surface. 1976 Marconi Instrumentation 15 54 To preserve the best accuracy and discrimination a meter with a scale length similar to the earlier TF 2600 was chosen with a mirror scale to avoid parallax errors. < as lemmas |
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