Show simple item record

dc.contributor.authorBlatt, Joel H.
dc.contributor.authorCahall, Scott C.
dc.contributor.authorHooker, Jeffery A.
dc.date.accessioned2017-10-06T16:50:39Z
dc.date.available2017-10-06T16:50:39Z
dc.date.issued1993-05-28
dc.identifier.citationBlatt, J. H., Cahall, S. C., & Hooker, J. A. (1993). Variable-resolution video moire error map system for inspection of continuously manufactured objects. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, , 1821 296-303en_US
dc.identifier.urihttp://hdl.handle.net/11141/1789
dc.descriptionInterferometersen_US
dc.description.abstractMoire techniques can be a powerful tool to determine deviation of a manufactured shape from a desired shape. In a traditional moire system, distorted gratings on an object are viewed through an undistorted grating. The moire contours that result represent equal depth contours over the entire viewed surface. By generating the moire patterns in video, it is possible to view the distorted gratings on a test object through a set of gratings that has been distorted by a similar but perfect object. The output is then a set of moire contours that corresponds to the differences between the two surfaces. This difference or error map eliminates much of the unnecessary information generated in traditional moire inspection and thus becomes a valuable tool for comparisons between an imperfect test object and a manufacturing standard. We have developed a variable resolution video system for creating this error map using a Michelson interferometer to generate the gratings. We have successfully applied this system to damage detection on a long, continuous lengths of pipe by having two side-by-side cameras looking at different sections of pipe and also by having one camera's view filtered with a video-taped recording of an undamaged section of the pipe.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with publishers policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttp://spie.org/publications/journals/guidelines-for-authors#Terms_of_Useen_US
dc.titleVariable-resolution video moire error map system for inspection of continuously manufactured objectsen_US
dc.typeConference Proceedingen_US
dc.identifier.doi10.1117/12.145546


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record