Optical Tomography System: Charge-coupled Device Linear Image Sensors

• Main Authors: M. Idroas, R. Abdul Rahim, M. H. Fazalul Rahiman, R. G. Green, M. N. Ibrahim
• Format: Article
• Language: English
• Published: IFSA Publishing, S.L. 2010-09-01
• Series: Sensors & Transducers
• Subjects: Bubbles velocity; Optical tomography; Inverse algorithm
• Online Access: http://www.sensorsportal.com/HTML/DIGEST/september_2010/P_679.pdf

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 micron by 14 micron 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.