National Repository of Grey Literature 22 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Large displacement and deformation measurement by frequency sweeping digital holography
Psota, P. ; Lédl, Vít ; Kaván, František ; Matoušek, O. ; Doleček, R.
Recently, a digital holographic method called Frequency Sweeping Digital Holography (FSDH) for high precision measurements of surface topography of mechanical parts has been introduced. The greatest advantage of the presented FSDH is the fact that the measurement is absolute. i.e. optical path difference is independently retrieved in every single pixel. This approach can therefore be used also for measurement of large displacements and deformation. FSDH is particularly suitable in cases where the common digital holographic methods fail due to e.g. 2π unambiguity problem or speckle decorrelation. Measurement method principles, setup details, an some features of the method are discussed.\n
Production of optical components for prototype I
Doleček, Roman ; Pintr, Pavel
This report describes the process of a freeform mirrors production. Mirrors are part of optical system of the laser head prototype.
Optimizing the process of producing optical components
Doleček, Roman ; Pintr, Pavel
This report describes a development of the optimization of the freeform mirror production process. Mirrors are part of optical system of the Prototype I.
Využití Business Intelligence
Doleček, Radek ; Kubálková, Markéta (advisor) ; Kubálek, Tomáš (referee)
Abstract The goal of this bachelor thesis is try to refer to a rising trend of whole issue of Business Intelligence. An interdisciplinary approach to the company data analytics in various business and industry sectors has had rising tendency and there is a potential in many cases to effektively speed as well as to ease the position relating to the area of the field in which the leaders, managers or experienced users are capable of working on new strategies, leadership and controling and organizing a company. Also an aspiration is to point to avalaible resources of processing data in the field of retailing as the main influencing factors for marketing and finance management. This thesis is connected with information to lead the reader from theoretical part and introducing the thesis to the main goal of this work, to partly uncover the resources in business data, outline their practical use and not and last but not least to evoke the interest of a reader in the comprehensive problem.
TOMOGRAPHICAL APPROACH IN 3-D TEMEPEARTURE DISTRIBUTION MEASUREMENT BY DIGITAL HOLOGRAPHY
Psota, Pavel ; Doleček, Roman ; Lédl, Vít ; Vojtíšek, Petr ; Vít, T. ; Matoušek, Ondřej
This paper presents a digital holographic method for measurement and visualization of temperature distribution in 3-D space. It is based on measurement of phase information along various projections followed by a tomographic reconstruction of the 3-D temperature distribution. The method is experimentally proved and some results are presented in this paper.
SIEMENS ‘FLYEYE‘ prototype lens results within a project 3SU1
Doleček, Roman ; Melich, Radek ; Macner, David
The aim of this study is to design and prototype a lens that enable a decrease of the light intensity that radiate into forward direction (90°) and at the same time increase the FWHM of the irradiated pattern.
Simulation of optical system of deposition controller
Doleček, Roman ; Pintr, Pavel ; Václavík, Jan
The report describes results of modeling of optical system which is component of optical monitoring system applied on machines for vacuum thin film deposition. Results were compared to real behavior of system, especially chromatic properties and total throughput. A numerical optimization, based on analysis results, was performed in order to improve throughput and ruggedness of the system.
Digital Holographic Method for Piezoelectric Transformers Vibration Analysis
Psota, Pavel ; Kopecký, V. ; Lédl, Vít ; Doleček, Roman
The paper describes a holographic method for vibration analysis in nanometer range. The method was successfully applied on different types of piezoelectric transformers and the measurement results are introduced. To proof the reliability of the method it was done a comparing simultaneous measurement of a piezoelectric component by the holographic method and the well-established single-point interferometric method. Results showing the minimal deviation of both methods are presented in the final part of the paper.
Digital holographic setup for measurement of asymmetric temperature field and tomographic reconstruction
Doleček, Roman ; Kopecký, V. ; Psota, Pavel ; Lédl, Vít
This paper presents a digital holographic multidirectional interferometric method for measurement of periodic asymmetric temperature fields. This method uses a modified Twymann-Green setup having double sensitivity. The setup employs one precisely synchronized and triggered CCD camera with a measured coherent phenomenon. That allows a large number of the phenomenon’s different projections capturing which are used for 3D tomographic reconstruction.
Measurement of Vibration Mode Structure for Adaptive Vibration Suppression System by Digital Holography
Psota, Pavel ; Lédl, Vít ; Doleček, Roman ; Mokrý, P. ; Kopecký, V.
Previously the frequency-shifted digital holographic interferometry (FSDHI) for measurement of vibration amplitudes in range of nanometers was introduced and verified by authors [1,2]. The method FSDHI addressed some of the drawbacks of the conventional methods and was used mainly for piezoelectric transformer vibration amplitudes and mode structures measurement [3]. The limiting factor for application of this method is the maximal measured value of the vibration amplitude without the risk of ambiguity. The value is approximately 80nm for the frequency doubled Nd: YAG line. Since FSDHI enables us to precisely measure vibration amplitudes over the whole inspected area with very high lateral resolution, it could also be a very useful tool for measurement of vibration amplitudes and mode structures for research in the field of adaptive suppression systems. Such a measurement would provide a necessary feedback about the system behavior.This was the reason why we put an effort

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See also: similar author names
1 Doleček, R.
1 Doleček, Radek
1 Doleček, Rajko
6 Doleček, Roman
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