Abstract
A fringe-evaluation system for a vibration measurement is presented, which is based on the phase-shifting method in real-time holographic interferometry. Phase-shifted real-time holographic interferograms are acquired by a TV camera when stroboscopically illuminating the object of interest. An arctangent calculation with phase-shifted fringe patterns gives a phase distribution proportional to the displacement of the object, including the initial phase of the vibration. The effects of the time-integration of the real-time fringe, which involves a reduction in fringe contrast and phase error in the arctangent calculation, are analysed theoretically. Experimental demonstrations are also presented for two cases: vibration which is spatially uniform; and vibration in which the initial phase is non-uniform.
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.
