Creative Commons "Este é um artigo publicado em acesso aberto sob uma licença Creative commons (CC BY-NC-SA 4.0). Fonte: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85153511762&origin=inward. Acesso em: 22 maio 2023.DIB, L. F. G.HENRIQUE, M. C.SAITA, M. T.BARBOSA, E. A.2023-05-012023-05-012023-01-05DIB, L. F. G.; HENRIQUE, M. C.; SAITA, M. T.; BARBOSA, E. A. Vibration measurement by projection of phase-modulated and amplitude-modulated structured light. Journal of Applied Research and Technology, v. 1, n.1, p. 11-21, maio, 2023.2448-6736https://repositorio.fei.edu.br/handle/FEI/4769© 2023 Universidad Nacional Autonoma de Mexico. All rights reserved.Most of the whole-field optical methods for vibration measurement have low sensitivity when the points of the studied surface vibrate with the same amplitude. Those techniques also usually require complex and/or expensive solutions which are difficult to implement in engineering processes when the vibration amplitudes are relatively high. In order to overcome those limitations we propose a method for out-of-plane vibration measurement which uses structured light projection. The vibrating surface is obliquely illuminated by straight and parallel interference fringes produced by a Twyman-Green interferometer with a 532-nm laser as light source. In order to enable fringe visualization two techniques were employed, namely, the phase modulation of the fringe pattern by using a vibrating mirror in the interferometer, and a stroboscopic illumination by using a Fabry-Perot etalon amplitude modulator. We demonstrated the technique by measuring the vibration amplitudes of small objects in the millimeter and submillimeter range.Acesso AbertoArtigo10.22201/ICAT.24486736E.2023.21.1.1076fringe projectioninterferometryphase modulationstroboscopyvibration measurement