Abstract
A new method of holographic interferometry is proposed for obtaining the contours of the vibration amplitude and determining the phase of the vibration of an object. The basic idea is to make a double exposure hologram by the time average and the sinusoidal phase modulation methods. The brightest interference fringe on the reconstructed image corresponds to a nodal line and the second brightest fringe gives the information on the relative phases of vibration between various object points. The new method has been applied to a practical vibration study of the blade group of a steam turbine and its usefulness and simplicity have been verified.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
