Abstract
Abstract This paper presents the theory and experimental technique whereby the slope at any point on the surface of an object can be measured. The object under study is first illuminated by a laser beam expanded through an optical fibre and its image recorded on a photographic plate placed at the image plane of an image-shearing camera. A second exposure on the same photographic film is made after the light source is moved slightly in a certain direction. Experimental results for objects of known shapes demonstrate that the local slopes determined from the reconstructed fringe pattern compare well with the actual values.
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.
