A Practical Positioning Method in End-Plate Surface Distance Measurement with Nano-Meter Precision
Source abstract
Abstract
End-plate surface distance is important for length value dissemination in the field of metrology. For the measurement of distance of two surfaces, the positioning method is the key for realizing high precision. A practical method with nanometer positioning precision is introduced in consideration of the complexity of positioning laser sources of the traditional methods and new methods. The surface positioning is realized by the combination of laser interference and white light interference. In order to verify the method, a 0.1 mm height step is made, and an experiment system based on the method is established. The principle and the basic theory of the method are analyzed, and the measures to enhance the repeatability from optical and mechanical factors and signal processing methods are presented. The experimental result shows that the surface positioning repeatability is in the order of 10 nm. The measurement uncertainty evaluation shows that the standard uncertainty is 21 nm for a 0.1 mm step. It is concluded that the method is suitable to be applied to the length measurement standard of the lab.
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Research context
OpenAlex topics: Advanced Measurement and Metrology Techniques · Surface Roughness and Optical Measurements · Adhesion, Friction, and Surface Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Division of Metrology in Length and Precision Engineering, National Institute of Metrology, Beijing 100013, China
School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China
Funding
General Administration of Quality Supervision, Inspection and Quarantine of China · Special Scientific Research on Civil Aircraft of Ministry of Industry and Information Technology of China · Sichuan Province Key Research and Development Plan of China · National Key Research and Development Plan of China
References (16)
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