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Design of a mirror collimator for a light beam outgoing from a silica fibres bundle of a circular cross section.
Vodák, Jiří ; Brillová, Kateřina (referee) ; Ohlídal, Miloslav (advisor)
Imaging spectroscopic reflectometry is an innovative method for studying optical properties of thin layers. This method allows as studying large areas of thin layers. Imaging spectrophotometer designed in The Institute of Physical Engineering was supposed to allow measurements along areas of about 25 mm x 25 mm. However this area was not achieved. To achieve desired dimensions of the area under study it is necessary to redesign the optical transmission setup between a source of monochromatic light and the imaging spectrophotometer.The old spectrophotometer design consists only of a mirror collimator not sufficient enough to collimate a rectangle shaped light beam on the output of the monochromator. The new design will consist of optical cable of silica fibers transforming the rectangle input light beam into a light cone which will be easier to collimate by a mirror collimator.
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Design of an imaging spectrophotometer for the spectral range 200-700 nm. Verification of the design in a laboratory set-up of the instrument
Doležal, Matěj ; Bouchal, Petr (referee) ; Ohlídal, Miloslav (advisor)
The bachelor thesis is devoted to the design and realization of laboratory setup of an imaging spectrophotometer for the spectral range 200–700 nm. In the introductory part of the thesis, an analysis of physical phenomena and quantities describing them is carried out which are important the given task solution. Research is made for imaging spectrophotometers that were implemented at the Institute of Physical Engineering BUT in the past. Attention was paid to the function and assembly of these devices. A substantial part of the work concerns the design of an imaging spectrophotometer with an angle of incidence of the light beam on the sample close to 90°, which would enable measurement in reflection and transmission mode. An analysis of the phenomena that influence the function of the given spectrophotometer is carried out. Based on this analysis, the design of the test set of the device is carried out. Subsequently, its implementation is described in detail, including the assembly procedure of the given spectrophotometer. Furthermore, the device is adjusted and, simultaneously, possibilities for improving the display quality are formulated. Then a test measurement of the thin layer prepared by plasma jet technology is performed. In the conclusion, the achieved results are summarized and ways to possible improvement of the functional imaging spectrophotometer are indicated.
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Optical Characterization of Thin Films Using Evolutionary Techniques
Horáček, Miloslav ; Bidlo, Michal (referee) ; Jaroš, Jiří (advisor)
My master's thesis deals with creating of a suitable evaluation technique that optimizes the optical parameters of the thin films according to the specified requirements of the proposer. This technique will be used at the Faculty of Mechanical Engineering and it should facilitate the evaluation of measurement results of the The Institute of Physical Engineering workers. Research workers use a digital imaging spectrophotometer for some measurements of optical properties of thin films at the institute. My most important task is to process the output data of the spectrophotometer concerning selected thin film. Construed master's thesis describes all the tools and techniques that have been used for the implementation of the program including evolutionary techniques and basics of the thin films optics (within the framework of the electromagnetic optics). As an enclosure, an electronic medium with the source codes of the whole application is provided.
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Design of a mirror collimator for a light beam outgoing from a silica fibres bundle of a circular cross section.
Vodák, Jiří ; Brillová, Kateřina (referee) ; Ohlídal, Miloslav (advisor)
Imaging spectroscopic reflectometry is an innovative method for studying optical properties of thin layers. This method allows as studying large areas of thin layers. Imaging spectrophotometer designed in The Institute of Physical Engineering was supposed to allow measurements along areas of about 25 mm x 25 mm. However this area was not achieved. To achieve desired dimensions of the area under study it is necessary to redesign the optical transmission setup between a source of monochromatic light and the imaging spectrophotometer.The old spectrophotometer design consists only of a mirror collimator not sufficient enough to collimate a rectangle shaped light beam on the output of the monochromator. The new design will consist of optical cable of silica fibers transforming the rectangle input light beam into a light cone which will be easier to collimate by a mirror collimator.
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