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Spatial light modulator based light source with controlled spectral emission

Kyriakopoulos Kosmas

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Year 2019
Type of Item Diploma Work
Bibliographic Citation Kosmas Kyriakopoulos, "Spatial light modulator based light source with controlled spectral emission", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2019
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In this thesis, the development of a Spatial light modulator based light source with con-trolled spectral emission is presented, which is able to project any design spectrum that the user wants. Various Tunable-Spectrum Light Sources (TLS) based on different technologies already exist such as Lasers (Distributed Bragg Reflector, Distributed Feedback, Ion and Dye) and Tunable Filters (Liquid Crystal, Optical Parametric Oscillator and Acousto-optic). However, they present major disadvantages such as low throughput, high cost, low emitted optical power, and they usually operate on a few (less than ten) simultaneous emitted wavelengths.The light source designed in this thesis is capable of projecting not only peaks spectrum like the above light sources but any available spectrum (in the shape of curve) there is in the world. The light source consists of a DLP (Digital light processing), optical fibers and variable filters. Also, a software development accompanies the light source to be fully PC controlled. Calibration of the light source and optical power was performed using a spectrometer. A series of laboratory tests have been conducted to evaluate the performance of the designed light source.The intended applications of the innovative light source span a wide range of disciplines including but not limited as an achromatopsia tester, vision sensitivity tester, calibrator for optical instruments and for Metameric colour reproduction and study etc.

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