Matthias Eifler
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View article: Common Practices and Methodologies in Scientific Functional Characterization of Surface Topography
Common Practices and Methodologies in Scientific Functional Characterization of Surface Topography Open
More and more surfaces are required to fulfill functional characteristics that are embodied by their surface topography. In the process of measuring and characterizing the corresponding surfaces, many research activities have been conducte…
View article: Topography fidelity determination of optical surface texture measuring instruments – an inter-laboratory comparison
Topography fidelity determination of optical surface texture measuring instruments – an inter-laboratory comparison Open
The topography fidelity is one of the fundamental metrological characteristics defined by the new ISO calibration framework. It must be considered and analyzed within the scope of a comprehensive calibration. However, there is still a lack…
View article: Surface Topography as an Energy State: Hamiltonian Description of Functional Properties in Phase Space and Quantification via Optical Methods
Surface Topography as an Energy State: Hamiltonian Description of Functional Properties in Phase Space and Quantification via Optical Methods Open
The assessment of tribological processes necessitates comprehensive monitoring and interpretation of surface states, traditionally by topography height values and surface texture parameters. This paper proposes a phase space representation…
View article: Feature characterization for profile surface texture
Feature characterization for profile surface texture Open
Conventional field parameters for surface measurement use all data points, while feature characterization focuses on subsets extracted by watershed segmentation. This approach enables the extraction of specific features that are potentiall…
View article: Correlational study of multiscale analysis and the metrological characteristics of areal surface topography measuring instruments
Correlational study of multiscale analysis and the metrological characteristics of areal surface topography measuring instruments Open
With the metrological characteristics, an effective framework for the calibration, adjustment, performance specification and verification of areal surface topography measuring instruments has been introduced. The characteristics have been …
View article: Feature Characterization for Profile Surface Texture
Feature Characterization for Profile Surface Texture Open
Conventional field parameters for surface measurement use all data points, while feature characterization focuses on subsets extracted by watershed segmentation. This approach enables the extraction of specific features that are potentiall…
View article: Bayesian analysis of uncertainties in circle, straight-line and ellipse fitting considering a-priori knowledge − comparative analysis with total-least-squares approaches
Bayesian analysis of uncertainties in circle, straight-line and ellipse fitting considering a-priori knowledge − comparative analysis with total-least-squares approaches Open
Fitting standard geometric elements into measurement data using Least-Squares techniques is a common task in signal processing across various technical applications. However, the application of these well-established but purely data-based …
View article: Comprehensive profile and areal calibration by additively manufactured material measures
Comprehensive profile and areal calibration by additively manufactured material measures Open
The calibration of surface texture measuring instruments is standardized with two distinct types of material measures. ISO 25178-70 categorizes material measures that feature a profile and an areal surface topography. The result is that di…
View article: Ball-end micro-milling of material measures: wear behavior in field use
Ball-end micro-milling of material measures: wear behavior in field use Open
Micro-milling is a precise method for micro-structuring component surfaces. When complex or free-form structures like material measures are to be manufactured, ball-end milling tools are particularly suitable. In preliminary studies by the…
View article: Ball end micro milling of brass: Wear behavior in field-use
Ball end micro milling of brass: Wear behavior in field-use Open
Micro milling is a precise method for micro structuring component surfaces. When complex or free-form structures are to be manufactured, ball end milling tools are particularly suitable. In preliminary studies by the authors, areal materia…
View article: Comprehensive angular scattering distribution analysis for resource-efficient manufacturing
Comprehensive angular scattering distribution analysis for resource-efficient manufacturing Open
Most measuring principles for surface topography measurement cannot be broadly used within machine tools due to the rough environment featuring vibrations, dust, cooling liquid, or temperature gradients. Having to measure outside of the ma…
View article: Example data for "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics"
Example data for "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics" Open
Example raw data used to create figures during the conference paper "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics", presented at euspen’s 21st International Conference & Exh…
View article: Example data for "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics"
Example data for "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics" Open
Example raw data used to create figures during the conference paper "Calibration of X-ray computed tomography for surface topography measurement using metrological characteristics", presented at euspen’s 21st International Conference & Exh…
View article: Traceable functional characterization of surface topography with angular-resolved scattering light measurement
Traceable functional characterization of surface topography with angular-resolved scattering light measurement Open
Among other functional characteristics, tribological properties of workpieces are directly associated with the microstructures on their surface. Thus, a precise, reliable, and traceable acquisition of these microstructures is required to e…
View article: Analysis of dimensional accuracy for micro-milled areal material measures with kinematic simulation
Analysis of dimensional accuracy for micro-milled areal material measures with kinematic simulation Open
The calibration of areal surface topography measuring instruments is of high relevance to estimate the measurement uncertainty and to guarantee the traceability of the measurement results. Calibration structures for optical measuring instr…
View article: Define and measure the dimensional accuracy of two-photon laser lithography based on its instrument transfer function
Define and measure the dimensional accuracy of two-photon laser lithography based on its instrument transfer function Open
Two-photon polymerization (TPP) is a powerful technique for direct three-dimensional (3D) micro- and nanomanufacturing owing to its unique ability of writing almost arbitrary structures of various materials. In this paper, a novel method i…
View article: Physical Modeling of Full-Field Time-Domain Optical Coherence Tomography
Physical Modeling of Full-Field Time-Domain Optical Coherence Tomography Open
In this paper, a physical model of full-field time-domain optical coherence tomography (FF-TD OCT), which focuses the requirements of measuring inner textures of flexible layered samples in industrial applications, is developed and validat…
View article: Determination of the surface topography of ball end micro milled material measures
Determination of the surface topography of ball end micro milled material measures Open
Micro milling is a common process for micro structuring component surfaces, e.g. for manufacturing material measures that are applied for the calibration of areal surface topography measuring instruments. In this study, the surface topogra…
View article: Crossing-The-Line Segmentation as a Basis for Rsm and Rc Evaluation
Crossing-The-Line Segmentation as a Basis for Rsm and Rc Evaluation Open
Feature characterization of rough surfaces is of growing interest in terms of a function oriented description of technical surfaces. Feature characterization requires a segmentation of significant hills and dales of the measured profile. T…
View article: Comparison of material measures for areal surface topography measuring instrument calibration
Comparison of material measures for areal surface topography measuring instrument calibration Open
The calibration of areal surface topography measuring instruments is a topic that is currently under discussion in international standard committees and a specification standard that defines the so-called ‘metrological characteristics’ has…
View article: Micro milling of areal material measures –Study on surface generation for different up and down milling strategies
Micro milling of areal material measures –Study on surface generation for different up and down milling strategies Open
Ball end micro milling is a suitable process for the manufacturing of freeform surfaces and therefore appropriate for the manufacturing of material measures according to ISO 25178-70. In previous studies of the authors, ball end micro mill…
View article: Comparison of material measures for the determination of transfer characteristics of surface topography measuring instruments
Comparison of material measures for the determination of transfer characteristics of surface topography measuring instruments Open
The description of the lateral resolution criterion for profile and areal surface topography measuring instruments is still under discussion in the international standardization. Several studies have examined the different methods proposed…
View article: Calibration sample for arbitrary metrological characteristics of optical topography measuring instruments
Calibration sample for arbitrary metrological characteristics of optical topography measuring instruments Open
Areal optical surface topography measurement is an emerging technology for industrial quality control. However, neither calibration procedures nor the utilization of material measures are standardized. State of the art is the calibration o…
View article: Two-photon laser lithography in optical metrology
Two-photon laser lithography in optical metrology Open
Two-photon laser lithography has become one of the most promising additive manufacturing techniques on the micron scale and is applied, e.g., in fields of micro-optics and -robotics as well as optical and mechanical metamaterials. Here, we…
View article: Micro-milling of areal material measures – influences on the resulting surface topography
Micro-milling of areal material measures – influences on the resulting surface topography Open
Increasing requirements on the accuracy of parts and surface structures generate a necessity of adequate areal surface topography measuring instruments. The calibration of those is decisive and has to be adapted to the measurement applicat…
View article: Model Selection and Quality Estimation of Time Series Models for Artificial Technical Surface Generation
Model Selection and Quality Estimation of Time Series Models for Artificial Technical Surface Generation Open
Standard compliant parameter calculation in surface topography analysis takes the manufacturing process into account. Thus, the measurement technician can be supported with automated suggestions for preprocessing, filtering and evaluation …