公开(公告)号：US3985448A

公开(公告)日：1976-10-12

申请号：US539321

申请日：1975-01-08

申请人： Klas Rudolf Wiklund ,  Nils Gunnar Bernhard ,  Harald Kleinhuber

发明人： Klas Rudolf Wiklund ,  Nils Gunnar Bernhard ,  Harald Kleinhuber

IPC分类号： G01B11/00 ,  G01D5/36 ,  G01B11/14

CPC分类号： G01D5/36

摘要： A measuring device is disclosed which can measure an angle or length and which employs either an angle or length measuring plate. The angle or length measuring plate has thereon at least one measuring scale which has a regular pattern along the majority of the lengths thereof and an irregular pattern on two portions thereof. A light beam shines through an optical system to pass through the measuring scale at two points and from there into a photo-detector. The light path is arranged to pass through the two irregular portions at the same time. Several embodiments of the irregular patterns are shown. A circuit is also shown to detect the irregular portions and employ it as a reference signal.

摘要翻译： 公开了一种可以测量角度或长度并且采用角度或长度测量板的测量装置。 角度测量板或长度测量板上具有至少一个测量刻度尺，该刻度尺沿其大部分长度具有规则图案，并且其两部分上具有不规则图案。 光束通过光学系统照射通过测量刻度在两点并从那里进入光电检测器。 光路被布置成同时穿过两个不规则部分。 示出了不规则图案的几个实施例。 还示出了电路来检测不规则部分并将其用作参考信号。