Optical Instruments, Volume. 47, Issue 3, 44(2025)
Evaluation and calibration of the measurement characteristics of white light interference systems
The measurement system based on the white light interference principle (such as white light interference microscope) has the technical advantages of sub-nanometer longitudinal resolution, non-contact, high efficiency of field scanning, etc., and is often used to measure the surface morphology and structure of products on the micro/nano scale. The analysis, evaluation, and calibration of the measurement characteristics of white light interferometry instruments is a complex and practical work, which is the basis of the research and application of this kind of instruments. Based on the principle of white light interference and the definition and regulation of relevant national standards, the measurement characteristics of the white light interference measurement system and the quantities influencing the system are analyzed theoretically. On this basis, the measurement characteristics of WLIS for metrological application are presented, i.e., measuring range and indicating error. Then, the theoretical analysis of the above measurement characteristics and their measurement and calibration methods are discussed. The three-axis measurement deviation of the system is calibrated by the standard template of step height and line interval, and the 3D measurement traceability chain based on the white light interference system is constructed.
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Xiaoyu CAI, Junjie WU, Jiasi WEI. Evaluation and calibration of the measurement characteristics of white light interference systems[J]. Optical Instruments, 2025, 47(3): 44
Received: Jun. 17, 2024
Accepted: --
Published Online: Jul. 28, 2025
The Author Email: Jiasi WEI (weijs@simt.com.cn)