E. J. Talabani, R. and روندإحسان 2009. Displacement Detection Application of HDNS A2051 Optical Sensor for Controlling a 4-DOF Cylindrical Manipulator. Al-Rafidain Engineering Journal (AREJ). 17, 6 (Dec. 2009), 53–66. DOI:https://doi.org/10.33899/rengj.2009.43602.