Vladislav Lang

Vladislav Lang
University of West Bohemia · New Technologies - Research Centre

PhD

About

14
Publications
1,344
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105
Citations

Publications

Publications (14)
Article
Full-text available
A unique combination of the ultrashort high-energy pulsed laser system with exceptional beam quality and a novel Diffractive Optical Element (DOE) enables simultaneous production of 2601 spots organized in the square-shaped 1 × 1 mm matrix in less than 0.01 ms. By adjusting the laser and processing parameters each spot can contain Laser Induced Per...
Article
Full-text available
ncreased temperature in humans is one of symptoms of infectious diseases. Infrared thermography is a popular method for measuring temperature as it offers fast and non-contact temperature measurement. However, and despite many advantages, its real accuracy for human temperature measurement is not sufficient in many cases. This study was focused on...
Article
Ultrashort pulse laser micromachining is affected by the heat accumulation resulting from the residual heat from previous laser pulses on the sample surface. Up to now, most of the works analysed the accumulation by numerical modelling. The present work focussed on development and application for the first time of a measurement system of heat accum...
Patent
The device for infrared non-destructive testing of materials consists of a working unit (1,9,12,15), in which radiation sources (5,18) and at least one thermographic camera (3) are integrated. These sources (5,18) and the thermographic camera (3) or cameras (3) are arranged in the front surface (8,16) of the working unit (1,9,12,15). The working un...
Article
This article presents a new digital method, called Stamp method, for elimination of undesired noise data from a periodic IR signal. The Stamp method is a useful tool for statistical analysis of changes which appear in a noised input signal. One stamp is a statistical image of several consequence periods from a raw input signal. The Stamp method is...
Article
Abstract A new single-side flash method for thermal diffusivity determination is presented. The method is based on a laser-flash pulse excitation and infrared thermography non-contact temperature measurement of a thermal response of a studied object. Using this method, the both excitation and measurement at one side (front side) of the studied obje...
Article
The martensitic phase transformation in a Ni53.6Mn27.1Ga19.3 shape memory alloy is an athermal phase transformation that starts practically, immediately after reaching a certain transient temperature. The final temperature is given at each point of the sample by two processes: heat conduction and phase transformation. Both processes take place in t...
Article
Full-text available
Résumé -Cette étude concerne les propriétés thermiques des bétons de chanvre, matériaux à faibles impacts environnementaux. Différentes techniques de mise en oeuvre (projection et moulage) et formulations sont prises en compte. Les conductivités thermiques sont mesurées grâce à différentes techniques expérimentales : sondes à chocs thermiques (sond...
Article
This paper deals with the introduction of a measuring system for application in research on the thermomechanical coupling of disc brakes. The first part is devoted to a description of the system for fast measurement of the brake disc surface temperature field during braking, which is the main part of the measuring system. The structure of the hardw...
Article
The contribution deals with the introduction of the measuring system for the application in the research of thermo-mechanical instabilities of disc brakes. The first part is devoted to the description of the system for fast measurement of the brake disc surface temperature field during braking, which is the main part of the measuring system. The se...
Article
Full-text available
Pulsed photothermal radiometry, a method developed in previous work for thin film thermal effusivity measurements, is now further developed for the determination of thin film thermal conductivity and volumetric specific heat. The present setup consists of a nanosecond laser source and two infrared IR detectors for temperature response measurement....
Article
Full-text available
The thermal conductivity of electrolytic iron has been measured in the temperature range from 100 to 390K. Electrolytic iron is a standard material for the measurement of thermal conductivity. The thermal conductivity was measured on a commercial device Thermal Transport Option (TTO) of a Physical Properties Measurement System (PPMS) produced by th...
Article
The knowledge of the effective energy deposited onto a surface by the reactive particles (ions, electrons, metastables, photons, etc.) in plasma processes such as thin-film deposition, sputtering, etching, etc., is of high interest to understand the basic mechanisms of energy transfer. In this article, a diagnostic is developed to directly measure...

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Projects

Projects (3)
Project
The primary aim of the ADVENTURE project is to strengthen the Thermal Spraying (TS) coating technology by introduction of the Laser Surface Texturing (LST), a clean, flexible, reproducible, environmentally friendly and resource-efficient technology, to the substrate preparation.
Project
The project is focused on the research of thermodiagnostic methods using IR cameras as tools for non-contact and fast identification of people with increased temperature and at the same time tools aiming to ensure the national security and management of epidemic threats. Details at https://medical.labir.cz/en/ Main goal: - To learn from the COVID ‐ 19 epidemic and to prepare a solution for a functional system of reliable thermodiagnostics of people in the Czech Republic for future epidemic threats manifesting the increased temperature of those infected. Additional goals: - Practically verify the hypothesis of a more accurate determination of the internal temperature of the measured person coming from an external warmer/colder environment, using an IR camera with a more sophisticated evaluation of the temperature field distribution. - Practically verify the hypothesis of earlier diagnosis of the onset of the epidemic and monitoring of its course using IR cameras with advanced processing of time series thermograms of a large number of people. - Develop a methodology for the use of thermographic diagnostic tools in times of “peace”, at the beginning of the epidemic, in the ongoing epidemic, and in local outbreaks. - To pass on information about new possibilities of using thermal imaging systems to the components of the integrated rescue system and to train them for more efficient and effective provision of their tasks not only during the epidemic. - To acquaint the professional and general public with the results of research and development and thus ensure wider application of project results, strengthen cooperation with the components of the integrated rescue system and achieve an increase in the level of security of the state and citizens in case of epidemic threats in the future.
Project
Development of thermal box-barrier which protects a device placed inside the box-barrier against mechanical damage and ambient high temperatures