Angle sensor with multiturn encoding

摘要

The sensor has a rotating disk (1) endowed of a peripheral annular surface (11) divided by coding cells of an angular position of the disk. A light guide (8) is movable in rotation along an axis parallel to a rotation axis of the disk, and an arm (7) is integrated with the light guide, where the arm is driven in radial speed direction by the rotating disk. The arm displaces the light guide relative to a photo detector (4), and the light guide presents a rectilinear speed section (10) tangentially oriented to the disk.