Abbe's principle - Abbe's principle

…There are also length measuring instruments in which the standard scale is fixed inside the bed, and the carriage has an optical system for detecting the standard scale, as shown in Figure 2. The length measuring instrument shown in Figure 1 satisfies Abbe's principle, while the length measuring instrument shown in Figure 2 is structured to satisfy Eppenstein's principle. Abbe's principle means that the measurement axis and the scale surface of the standard scale are arranged on the same line so that the measurement error caused by the angular deviation from the measurement axis of the carriage due to the non-straightness of the bed can be ignored. …

*Some of the terminology explanations that refer to "Abbe's principle" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…標準尺をベッド内に固定して，図2に示すように，往復台には標準尺検出用光学系をもった測長器もある。図1に示す測長器はアッベの原理を満足し，図2に示す測長器はエッペンシュタインの原理を満足する構造となっている。アッベの原理とは，ベッドの非真直性に基づく往復台の測定軸線からの角偏差による測定誤差を無視できるように，測定軸線と標準尺の目盛面とを同一直線上に配置することをいう。…

※「アッベの原理」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報