Robert Schmitt, Tilo Pfeifer, Guilherme Mallmann
MACHINE INTEGRATED TELECENTRIC SURFACE METROLOGY IN LASER STRUCTURING SYSTEMS

The laser structuring is an innovative technology used in a broad spectrum of industrial branches. There is however a market trend to smaller and more accurate micro structures, which demands a higher level of precision and efficiency. In this terms, an inline inspection is necessary, in order to improve the process through a closed loop control and early defect detection. Within this paper an optical measurement system for inline inspection of micro and macro surface structures is described. Measurements on standards and technical surfaces are presented, which underline the potential of this technique for inline surface inspection of laser structured surfaces.

Won-Kyu Lee, Chang Yong Park, Jongchul Mun, Dai-Hyuk Yu, Sang Eon Park, Sang-Bum Lee, Taeg Yong Kwon
LINEWIDTH NARROWING OF A DFB DIODE LASER USING A FIBER MACH-ZEHNDER INTERFEROMETER

The linewidth reduction from 3 MHz to 15 kHz was achieved with an 1156 nm DFB diode laser in a simple setup using an all-fiber Mach-Zehnder interferometer (MZI) with 5-m-long path imbalance. This result was achieved with no acoustic and vibration isolations. In addition, this result can be applied to any wavelength due to the commercial availability of DFB diode lasers and fiberoptic components in a wide wavelength range. The frequency lock was so robust that it could be maintained over weeks. Since a short fiber patch cord was adopted, optical power loss during the fiber transmission and bandwidth limitation due to the fiber delay were negligible.

J.A. Yagüe-Fabra, J.A. Albajez, M.A. Lope, J.J. Aguilar
PRECISION ENGINEERING ACTIVE LEARNING SUPPORTED BY THE ICT

In this paper an effective continuous improvement methodology developed by a group of professors by using tools from the industrial quality field is proposed. Its application to a course on dimensional metrology and precision engineering in mechanical engineering is presented. The use of that methodology, active learning methods, such as project-based learning or hands-on learning, and new information and communication technologies (ICT) has allowed the development of a natural critical learning environment for the students of that course, improving their results, the skills they get and their satisfaction with their own learning. All these methodologies, their application and, finally, the results and conclusions from the evaluation of the implemented actions are presented in this paper.

G. Beges, J. Drnovsek
IMPLEMENTATION OF INTERNATIONAL REQUIREMENTS WHEN PRESENTING RESEARCH RESULTS

This paper describes basic requirements and typical nonconformities with international requirements in order to in particular avoid ambiguity when expressing measurement and test results. The new International standards ISO 80000 series revises/supplements the previous versions of international standards ISO 31 series, ISO1000 and IEC 60027. According to these international requirements, there are still a lot of different approaches in presenting the research results. Not only that we noticed this problem in undergraduate, graduate and postgraduate education processes, but also in presenting research results in international journals. This paper presents only basic requirements in presenting the results in graphical and tabled way and some typical examples of non-conform presentation of research results.

K. Marjanen, M. Mettänen, H. Ihalainen
TEACHING OF MEASUREMENT BASED ON DIGITAL IMAGES

This paper gives an example of an education strategy aimed at teaching image based measurement and increasing the awareness of the importance of systems thinking and uncertainty analysis in measurement based on images. The name of the course is Measurements Based on Digital Image.