2026-03-10T00:54:15Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00009327 2024-06-20T06:28:08Z 934:935:936

半導体レーザを用いた段差を持つ粗面の形状計測: 3波長での位相測定を用いる方法 Shape Measurement of Rough Step Like Surface using a Laser Diode: The Method with Three-wavelength Phase Shifting 50212519 安達, 正明 北川, 洋一 松本, 哲也 稲部, 勝幸 Copyright © The Japan Society for Precision Engineering 精密工学会 The authors propose a new method which can measure a shape of rough step like surface by means of a speckle interferometry with a wavelength-changeable laser. A speckle phase available in the interferometry is usually affected not only by an optical path difference but also by a random component associated with surface roughness. The phase shifting method using two different wavelengths (λ1, λ2) is, therefore, limited to a single phase map about the optical path difference, because of the random component which remains without cancel. The single phase map is available only for the calculation of the shape of a continuous surface. In the proposed method, the authors use three different wavelengths (λ1, λ2, λ3) to obtain a double phase map, which is capable of a discontinuous surface shape calculation by means of a fringe-counting two-wavelength method. The validity of the method is experimentally demonstrated and discussion is extended to an accuracy of the measurement and an extent of the measurement range. 精密工学会 = The Japan Society for Precision Engineering 1999-01-01 2017-10-03 jpn journal article VoR http://hdl.handle.net/2297/42439 https://kanazawa-u.repo.nii.ac.jp/records/9327 10.2493/jjspe.65.418 https://www.jstage.jst.go.jp/browse/jjspe/-char/ja/ http://www.jspe.or.jp/ AN1003250X 0912-0289 精密工学会誌 = Journal of the Japan Society for Precision Engineering 65 3 418 422 https://kanazawa-u.repo.nii.ac.jp/record/9327/files/TE-PR-ADACHI-M-418.pdf application/pdf 532.4 kB 2017-10-03