Determining the optimum image recording conditions in shearography based on spatial frequency considerations

Fook S. Chau, Tuck Wah Ng

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The transmission function of a double-exposure shearing specklegram consists of fringe- bearing and non-fringe bearing components. To obtain interference fringes, spatial filtering is performed on the processed specklegram to allow only the fringe-bearing components to pass. The spatial frequency for filtering is often determined on a trial-and-error basis. In this paper, a technique is presented to obtain a spectral distribution from which the optimum spatial filtering frequency can be deduced. Knowledge of the optimum spatial filtering frequency to recording aperture relationship enables better selection of image recording conditions.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Pages15-26
Number of pages12
ISBN (Print)0819410225
Publication statusPublished - 1993
Externally publishedYes
EventIndustrial Applications of Optical Inspection, Metrology, and Sensing - Boston, United States of America
Duration: 19 Nov 199220 Nov 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1821
ISSN (Print)0277-786X

Conference

ConferenceIndustrial Applications of Optical Inspection, Metrology, and Sensing
CountryUnited States of America
CityBoston
Period19/11/9220/11/92

Cite this

Chau, F. S., & Ng, T. W. (1993). Determining the optimum image recording conditions in shearography based on spatial frequency considerations. In Proceedings of SPIE - The International Society for Optical Engineering (pp. 15-26). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 1821). SPIE.