Abstract
Pulsed Electronic Speckle Pattern Interferometry (ESPI) offers the possibility of analysing fast transient phenomena in experimental mechanics. However, due to the short pulse separation required, addition fringes with very low visibility are generated. Several methods have recently been developed to process these data but they all suffer some limitations. This paper presents an electro-optical system based on the use of a Pockels cell which enables the introduction of carrier fringes between the firing of two consecutive laser pulses. This allows calculation of the wrapped phase distribution from a single fringe pattern using the Spatial Synchronous Detection method and enables the laser pulse separation to be significantly reduced. Preliminary experimental measurements performed using a continuous wave laser are used to illustrate the performance of this approach.
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.
