Συντάχθηκε 11-10-2013 11:06
από Balasi Panagiota
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ΠΟΛΥΤΕΧΝΕΙΟ ΚΡΗΤΗΣ
Σχολή Ηλεκτρονικών Μηχανικών και Μηχανικών Υπολογιστών
Πρόγραμμα Προπτυχιακών Σπουδών
ΠΑΡΟΥΣΙΑΣΗ ΔΙΠΛΩΜΑΤΙΚΗΣ ΕΡΓΑΣΙΑΣ
ΧΡΗΣΤΟΥ ΡΩΣΣΟΥ
με θέμα
ΑΝΑΠΤΥΞΗ ΥΠΟΛΟΓΙΣΤΙΚΑ ΕΛΕΓΧΟΜΕΝΗΣ ΠΗΓΗΣ ΜΕΤΑΒΛΗΤΟΥ ΜΗΚΟΥΣ ΚΥΜΑΤΟΣ ΑΠΟ ΤΟ ΥΠΕΡΙΩΔΕΣ ΣΤΟ ΥΠΕΡΥΘΡΟ
DEVELOPMENT OF A COMPUTER CONTROLLED TUNABLE WAVELENGTH LIGHT SOURCE FROM ULTRAVIOLET TO INFRARED
Δευτέρα 14 Οκτωβρίου 2013, 11πμ
Αίθουσα 2041, Κτίριο Επιστημών, Πολυτεχνειούπολη
Εξεταστική Επιτροπή
Αν. Καθηγητής Κωνσταντίνος Μπάλας (επιβλέπων)
Καθηγητής Κωνσταντίνος Καλαϊτζάκης
Καθηγητής Διονύσιος Πνευματικάτος
Abstract
In this thesis, the development of an innovative Tunable Wavelength Light Source from Ultraviolet to Infrared is presented, which is able to emulate spectral distribution of various light sources.
Various Tunable 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 TLS designed in this thesis is capable of simulating spectral distribution of various light sources in the UV-VIS and VIS-IR regions as well as any (single or multiple) monochromatic wavelength in this range. The TLS has excellent throughput, more than 85%, great stability, low cost and high tunability, up to 22 individual emitted wavelengths.
The TLS consists of miniature high power solid-state light sources and variable filters. Each solid-state light source is driven independently, allowing individual control of the emitted optical power. Also, a Graphical User Interface (GUI) application is developed enabling the TLS to be fully PC controlled.
Calibration of the TLS’s wavelength and optical power was performed using a spectrometer and a photometer. A series of laboratory tests have been conducted to evaluate the performance of the designed TLS, i.e. emulation of a flat line response light source and random light sources. Performance evaluation showed about 85% flat transmittance in almost all the available wavelengths while the full-width at half maximum in each wavelength curve is less than 20nm.
The intended applications of the innovative TLS spans a wide range of disciplines including but not limited to microscopy, ophthalmology, endoscopy, quality control, calibration etc.
