Optical Tomography System: Digital Sensors for Masking Purpose in Parallel Beam Optical Tomography System

Authors: Rahim, Ruzairi Abdul; Thiam, Chiam Kok; Rahiman, Mohd. Hafiz Fazalul; Pusppanathan, Jaysuman; Susiapan, Yvette Shaan-Li

Source: Sensor Letters, Volume 6, Number 5, October 2008 , pp. 752-758(7)

Publisher: American Scientific Publishers

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Abstract:

Due to the lack of the number of projections available in a Parallel Beam Optical Tomography System (only x-axis and y-axis, also known as orthogonal projection), ambiguous image will be constructed when the flowing materials fall into certain positions in the pipeline. Therefore, two rectilinear projections are added to the system in order to correct this ambiguous image. However, the rectilinear projection only acts as a mask. Thus, converting the analog signals from the rectilinear sensors into binary digital signals is already sufficient.

Keywords: OPTICAL TOMOGRAPHY; PARALLEL BEAM; MASK; AMBIGUOUS IMAGE; DIGITAL OPTICAL SENSORS

Document Type: Research article

DOI: 10.1166/sl.2008.m157