Patent ID: 11946775
Assignee: COREPHOTONICS LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A position sensing unit, comprising:
a) a magnetic assembly (MA) having a width W measured along a first direction and a height H measured along a second direction and including at least three magnets having respective magnetic polarizations that define along the first direction at least a left MA domain, a middle MA domain and a right MA domain, wherein the magnetic polarizations of each MA domain are different; and
b) a magnetic flux measuring device (MFMD) for measuring a magnetic flux B,
wherein the MA is configured to move relative to the MFMD along the first direction within a stroke L that fulfils 1 mm≤L≤100 mm, stroke L beginning at a first point x0 and ending at a final point xmax over which the magnetic flux B changes, and wherein a minimum value Dmin of an orthogonal distance D measured along the second direction between a particular MA domain and the MFMD of the position sensing unit, fulfills L/Dmin>10,
wherein the at least three magnets are positioned sequentially along the first direction, and wherein adjacent magnets are separated by a gap.