An overview and a contribution to the optical measurement of linear displacement

• Published in: IEEE sensors journal Vol. 1; no. 4; pp. 322 - 331
• Main Authors: Girao, P.M.B.S., Postolache, O.A., Faria, J.A.B., Pereira, J.M.C.D.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-12-2001; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Angular position; Displacement; Displacement measurement; Error correction; Error detection; Intensity modulation; Laser beams; Light beams; Optical interferometry; Optical measurement; Optical modulation; Optical sensors; Position measurement; Redundancy; Sensor systems; Sensors
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/7361.983472

The present work is a contribution to the field of linear displacement measurements by optical means. For that purpose, a brief overview of some existing solutions is presented and two systems for axial linear displacement measurement based on light intensity detection are introduced. The systems have redundancy and were designed with the purpose of achieving identification and automatic correction of errors arising from inadvertent angular variations between the sensor and the light beam positions.