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Production sequence of Si-spheres and interferometrical determination of the sphere volume

Precision Engineering

Division 5

Dimensions from several metres down to nanometres — precise dimensional metrology as backbone of a reliable and sustainable industrial production.

Tasks

It is the main task of the division to assure the traceability of industrial measurements in different length and angle ranges by application of special measuring instruments, methods and standards. Also hardness metrology belongs to its scope. The aim of these activities is to offer traceability to industry in an adequate way and to jointly solve respective measurement challenges.
The research and development activities needed for these tasks focus on new measurement methods, instrumentation and standards. In addition the division is engaged in manufacturing and measurement tasks in the field foundations of metrology. The Scientific Instrumentation offers construction and manufacturing services for special components and precision instruments for the whole PTB.

News

The German association of professional surveyors DVW e.V. (Deutscher Verein für Vermessungswesen – Gesellschaft für Geodäsie, Geoinformation und Landmanagement e.V.) has adopted two good practice guides developed by the EMRP joint research project "SIB60 Surveying: Metrology for long distance surveying" which had been coordinated by PTB.

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Within a national research project PTB developed the worldwide largest involute gear ring standard. It embodies three different internal and external gears on a ring with a diameter of about 2 m. A national intercomparison on twelve different measurement machines has been successfully conducted and evaluated in relation to PTB’s calibration values.

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Within the scope of the EMPIR project "Strength-ABLE", a picoindenter was developed based on a microelectromechanical system (MEMS). The system is designed to bridge the measurement gap between scanning force microscopes (AFM) and nanoindentation devices. It offers indentation forces up to 400 μN and reaches indentation depths up to 9 μm at a force resolution of 9 nN. Commercially available AFM cantilevers with diamond tips can be used as indenters.

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DepartmentsDepartments

Data Analysis Service for Precision Engineering

The data analysis support provides advice to adopt numerical and system theoretical procedures to the specific tasks of the different departments. The support covers detailed advice and implementation support as well as tests and comparisons. Furthermore, the roughness reference software RPTB is also taken care of here, Opens external link in new windowhttps://www.ptb.de/rptb.

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