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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Návrh manipulátoru vzorku pro CCHM mikroskop / Design of manipulator of the sample for CCHM microscope

Špaček, Matěj January 2021 (has links)
In the Laboratory of the Experimental Biophotonics at Brno University of Technology, a new generation of the Coherence-Controlled Holographic Microscope (CCHM) is being developed. Because of the automation of certain microscope procedures, a fully motorized three axis computer controlled manipulator of the sample is to be employed. A fast and accurate lateral positioning in a range of several centimeters is required. For the focusing capability, very precise positioning in the optical axes is required as well. Initially, the basics of microscope manipulator design are presented. Then, commercially available solutions are introduced and compared with special focus on its possible implementation in the new generation of CCHM. However, due to the specific design of the new CCHM, available manipulators are not suitable. Therefore, a new optimized manipulator design is introduced in the second part of the thesis. A selection of its appropriate elements, especially actuators, is based on a review. For the new manipulator design, a technical documentation was made and a testing software was developed. A crucial part of the manipulator was assembled and tested.
22

Komunikační a řídicí karta k elektronovému mikroskopu / Communication and control card for electron microscope

Robotka, Jan January 2011 (has links)
The main aim of this thesis is to design a communication and control card for an electron microscope, eventually for other equipments of the company Delong Instruments a.s., which is dealing with its development and production. This card should replace existing communication card because of its low computational performance. Also, it should replace control and measure card manned with A/D and D/A converters. Thus, the new card will be providing not only the communication with a superior PC and other electronic systems, but also the control of other subsystems of the electron microscope, the determining of processional states and the measuring of internal physical quantities. At the beginning the requirements were determined and the main concept was made with the inclusion of the simple block diagram. It was very important to choose a suitable microcontroller, which will be an intelligence of the whole card and so it will be the most important component. The accent was set mainly on the sufficient computational performance, high modularity of its periphery, good vision of the future innovation and support and, of course, the price. The next requirement was the implementation of the Ethernet, which will be used for the communication between the card and the superior PC. The microcontroller which was chosen have the core architecture ARM Cortex-M3 and it is described in separate chapter. The next part of this thesis is dealing with the main communication standard of the card, which is the Ethernet. After the general description, the Ethernet was mainly discussed in context of the chosen microcontroller. The possibilities of the application of higher layer TCP/IP protocols were also discussed. Implied part of the thesis was the selection of other important components, especially A/D and D/A converters. Its characteristics will have a big effect on the characteristics of the card. In the last and the most important phase the electrical scheme was designed and it was described in detail. This scheme is the main result of this thesis and it is the main document for the future realization. Designed card will be able to process and control 16 differential analogue input signals, 16 differential analogue output signals, 8 digital inputs, 8 simple digital outputs and 4 digital outputs triggered by optocouplers. It will be able to communicate with the superior PC over the Ethernet with the maximum bit rate of 100 Mbit/s, with other electronic cards over the serial line UART through the optical fibers and with other internal and external equipments over the RS-485 and RS-232.
23

Mikroskopické snímky s vysokou hloubkou ostrosti / Microscopic images with high depth of focus

Růžičková, Martina January 2012 (has links)
The aim of the paper is to introduce an optic microscope as well as microscopic photography producing. It further engages in sharpening issues and attaining a sharp image with extremely robust depth acuteness assuming using a series of images with different acuteness levels. The goal is to create a suitable algorithm to increase depth acuteness, to perform a visual processing of the series of images and to get one final image with high depth acuteness.
24

Diagnostika kluzného kontaktu s využitím praktické aplikace „Metody prachových částic“ / Diagnosis sliding contact using practical applications "Methods particulate"

Kopecký, Jiří January 2013 (has links)
This thesis deals with the sliding contact of electrical machines and its diagnostic methods. Namely, the dust-particles method for assessing the length decrease of brushes is deeply described. Then, usage of the method in industry is described. The comparison of accuracy between manual version and new automated version of the method using computer analysis is presented. The final section is devoted to the practical verification of the new automated version which was developed especially for large machines. Measurements were performed on a small machine.
25

Osvětlovací soustava pro konfokální mikroskop s duálním rastrováním / Illuminating system for a tandem-scanning confocal microscope

Slabý, Tomáš January 2008 (has links)
The diploma thesis deals with a design of illuminating system for tandem-scanning confocal microscope using a high-power LEDs.
26

Návrh a realizace zařízení pro testování goniových mechanismů / Design and implementation of testing device for gonio mechanisms

Vaške, František January 2012 (has links)
Tato práce se zabývá návrhem a implementací zařízení na měření opakovatelnosti pohybu goniového mechanismu, dále měřením pohybových vlastností mechanismu a vyhodnocením naměřených dat. Popisuje navrhnuté a zavedené změny na mechanismu a vyhodnocuje vlastnosti prototypu.
27

Konstrukce mikroskopového LED osvětlovacího zdroje / Design of Microscope LED Illumination Source

Bartoň, Luboš January 2013 (has links)
This master’s thesis deals with the construction design of microscope episcopic LED illumination source and subsequent functional sample realization. Illumination source is compatible with industrial microscope Nikon Eclipse LV150 and designed as a replacement for halogen light source. Way of collecting light is chosen with respect to search analysis results and collector optical element and LED is selected with respect to the analysis of the episcopic illuminator. Two construction designs are designed with respect to the results of photometric analyzes. Optimal design is realized and compared with used lighting sources – halogen and xenon.
28

Konstrukční úpravy koherencí řízeného holografického mikroskopu / Modifications in mechanical design of the coherence controlled holographic microscope

Matela, Milan January 2013 (has links)
The aim of diploma thesis are modifications in mechanical design of the coherence controlled holographic microscope which will lead to reduction of some deficiencies. In this thesis there is a brief description of the history interference microscopy and differences between each types of interference microscopes. In this work there are stated some design deficiencies of actual condition of the microscope and also several solutions are suggested and shortly described. Then the best solution is chosen which is adjusted to a final form. It is described in detail and then realized. There is a summary included in the conclusion whether the new solution is suitable and if it fulfills the required condition.
29

Metodika pasportizací stavebních objektů dotčených okolní činností / Methodology of Passportization of Building Objects Damaged by Surrounding Activities

Novák, Jindřich January 2011 (has links)
The passportization of building structures is very important task efore the initiation of negative influences on to object. The aim is to prevent possible legal deputies in between owners of affected object. The demand of passportization of building structure is increasing with the exploding of developments projects from green fields to vacancies. The aim of this work is to determine the metodology of passportization of building structures and to apply it on existig object.
30

Aplikace transmisní elektronové mikroskopie s vysokým rozlišením pro strukturní analýzu nanovláken / Application of high resolution transmission electron microscopy for structure analysis of nanowires

Kachtík, Lukáš January 2016 (has links)
This diploma thesis deals with the structural analysis of semiconductor nanowires by transmission electron microscopy. The construction of microscope is introduced together with its basic imaging modes and with the function of each construction element in these modes. In the experimental part the results of analysis of several germnaium nanowires are discussed, with emphasis on their crystallographic structure and orientation.

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