公开(公告)号：US20160169710A1

公开(公告)日：2016-06-16

申请号：US14908402

申请日：2014-07-31

Applicant: RENISHAW PLC

Inventor： Anas F JARJOUR ,  Alan J HOLLOWAY

IPC: G01D5/34

CPC classification number: G01D5/345 ,  G01B11/26

Abstract: A rotation detection apparatus, including: a beam source for emitting a beam of polarised light; a decohering arrangement for eliminating or reducing the degree of coherence between first and second independent polarisation components of the polarised light to produce a decohered beam of polarised light; a detector for outputting a signal in dependence on the intensity of light incident thereupon, the detector arranged so that the decohered beam of polarised light is incident upon it; a polariser for location in the path of the decohered beam of polarised light such that rotation of the polariser relative to the decohered beam of polarised light results in a variation of the intensity of light incident upon the detector from the beam source and a corresponding variation in the signal output from the detector; and a processor for detecting the relative rotation based on the variation of the signal output from the detector.

Abstract translation: 一种旋转检测装置，包括：用于发射偏振光束的光束源; 一种用于消除或减少偏振光的第一和第二独立偏振分量之间的相干程度以产生已解理的偏振光束的去焦化装置; 检测器，用于根据入射到其上的光的强度来输出信号，所述检测器被布置成使得所述被去光束的偏振光束入射到其上; 偏振器用于在解离的偏振光束的路径中的位置，使得偏振器相对于去光束的偏振光的旋转导致入射到检测器上的光束与光束源的强度的变化，以及相应的变化 从检测器输出的信号; 以及用于基于从检测器输出的信号的变化来检测相对旋转的处理器。