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Secara umumnya, objektif projek ini adalah untuk mengimplimentasi teknik sinaran berbilang “fan beam” menggunakan penderia gentian optik dengan tujuan meningkatkan kadar perolehan data. Teknik sinaran berbilang “fan beam” dalam kes ini boleh didefinisikan sebagai membenarkan lebih daripada satu pemancar untuk memancarkan cahaya dalam suatu masa yang sama dengan menggunakan kaedah “switch–mode fan beam.” Kata kunci: Penderia gentian optik, tomografi optik fan–beam, teknik berbilang pemancar, kaedah switch–mode fan beam This paper investigates the acquisition rate for a multi–projection technique using optical fibre sensors for a fan beam optical tomography system. The multi–projection technique allows more than one emitter to project light at the same time. For the 32 pairs of sensors used, the 2–projection technique is being investigated whereby 16 sets of projections will complete one frame of light emission. Compared to the conventional single light projection technique used in switch–mode fan beam, multiple light projections technique has shown to be able to achieve a higher data acquisition rate. Key words: Optical fibre sensor, fan beam optical tomography, multi–projection technique, switch–mode fan beam method

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The objective of this paper is to review microwave tomography based on its field, application and antennas approaches. Researches on microwave tomography system have been done unceasingly for several decades especially in determine the dielectric properties for the material. Firstly, the dielectric properties and its influencing factors will be briefly described. Besides, although it has the potential to overcome other process tomography system, it still have some drawbacks. So, the general advantages and disadvantages are listed. Next, survey on the application of microwave tomography and type of antennas used will be discussed. Followed by the trend for the future.

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