Optical tomography system based on charge-coupled device linear image sensors: particle size measurement

• Main Authors: Idroas, Mariani, Abdul Rahim, Ruzairi, Fazalul Rahiman, Mohd. Hafiz, Ibrahim, Muhammad Nasir
• Format: Article
• Published: Elsevier B.V. 2011
• Subjects: QD Chemistry; TP Chemical technology
• Online Access: http://eprints.utm.my/id/eprint/29739/; http://dx.doi.org/10.1016/j.snb.2011.02.001

This paper discussed an optical tomography system based on charge-coupled device (CCD) linear image sensors. The developed system consists of a lighting system, a measurement section and a data acquisition system. Four CCD linear image sensors are configured around a flow pipe with an octagonal-shaped measurement section, for a four projections system. The four CCD linear image sensors consisting of 2048 pixels with a pixel size of 14 µm by 14 µm are used to produce a high-resolution system. A simple optical model is mapped into the system's sensitivity matrix to relate the optical attenuation due to variations of optical density within the measurement section. A reconstructed tomographic image is produced based on the model using MATLAB software. The designed instrumentation system is calibrated and tested through different particle size measurements from different projections.