title: Simulated and Real Sheet-of-Light 3D Object Scanning Using a-Si:H Thin Film PSD Arrays.
abstract: A MATLAB/SIMULINK software simulation model (structure and component blocks) has been constructed in order to view and analyze the potential of the PSD (Position Sensitive Detector) array concept technology before it is further expanded or developed. This simulation allows changing most of its parameters, such as the number of elements in the PSD array, the direction of vision, the viewing/scanning angle, the object rotation, translation, sample/scan/simulation time, etc. In addition, results show for the first time the possibility of scanning an object in 3D when using an a-Si:H thin film 128 PSD array sensor and hardware/software system. Moreover, this sensor technology is able to perform these scans and render 3D objects at high speeds and high resolutions when using a sheet-of-light laser within a triangulation platform. As shown by the simulation, a substantial enhancement in 3D object profile image quality and realism can be achieved by increasing the number of elements of the PSD array sensor as well as by achieving an optimal position response from the sensor since clearly the definition of the 3D object profile depends on the correct and accurate position response of each detector as well as on the size of the PSD array.
authors.affiliation: Institute of Design and Manufacturing, Technical University of Valencia, CPI, Edif. 8G, 46022 Valencia, Spain. jca8676@gmail.com.
authors.forename: Javier
authors.initials: J
authors.lastname: Contreras
authors.affiliation: Institute of Design and Manufacturing, Technical University of Valencia, CPI, Edif. 8G, 46022 Valencia, Spain. jtornero@idf.upv.es.
authors.forename: Josep
authors.initials: J
authors.lastname: Tornero
authors.affiliation: CENIMAT/I3N, Department of Material Science, Faculty of Science and Technology, FCT, New University of Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal. imf@fct.unl.pt.
authors.forename: Isabel
authors.initials: I
authors.lastname: Ferreira
authors.affiliation: CENIMAT/I3N, Department of Material Science, Faculty of Science and Technology, FCT, New University of Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal. rm@uninova.pt.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Martins
authors.affiliation: Department of Electrical Engineering, Faculty of Science and Technology, FCT, New University of Lisbon, and CTS/UNINOVA, Campus da Caparica, 2928-516 Caparica, Portugal. lugo@uninova.pt.
authors.forename: Luis
authors.initials: L
authors.lastname: Gomes
authors.affiliation: CENIMAT/I3N, Department of Material Science, Faculty of Science and Technology, FCT, New University of Lisbon and CEMOP/UNINOVA, 2829-516 Caparica, Portugal. emf@fct.unl.pt.
authors.forename: Elvira
authors.initials: E
authors.lastname: Fortunato
keywords: arrays; optical sensing and sensors; thin film devices and applications; three-dimensional image acquisition; three-dimensional image processing; three-dimensional sensing