Shams, I, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Greening, D (1988) A Non-Contact Opto-Electronic Sensing Device for Precision Linear and Angular Positioning of Robotic Manipulators. Proceedings of the Institution of Mechanical Engineers, Part B: Management and engineering manufacture, 202 (4). pp. 261-265.