Development of a multi-scale 3D dynamic measurement system using multiple lasers with different wavelengths

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14175
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21030:Measurement engineering-related
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Xia Peng 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (80768458)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: 計測工学 / 3次元計測 / ディジタルホログラフィ

Outline of Final Research Achievements

In this study, we have developed a calibration-based phase-shifting digital holography system using multiple lasers with different wavelengths. This system enables high-precision three-dimensional dynamic measurements at multiple scales in the depth direction. The proposed method allows for the simultaneous recording of holograms and fringe patterns to calibrate the phase-shifting amounts of multiple wavelengths in a single shot. Additionally, we have introduced an algorithm that automatically extracts and corrects the size of object wave spectra in the Fourier domain. The effectiveness of this algorithm has been validated through computer simulations. As part of our application, we conducted dynamic deformation measurements on a metal test specimen, achieving a measurement range of up to 2.1μm in the depth direction for discontinuous objects.

Free Research Field

計測工学

Academic Significance and Societal Importance of the Research Achievements

様々な科学研究や工学分野において高精度な3次元変位・形状の動的計測技術が必要とされている。例えば、材料科学では、物質の微細な構造や変形の解析において3次元計測技術が必要である。本研究では、波長が異なる複数のレーザーを用いて、奥行き方向にナノメートルオーダーからミリメートルオーダーまでのマルチスケールの高精度3次元動的計測を実現できる。様々な基礎科学研究や工業生産への応用が期待できるため、学術的意義と社会的意義が大きい。