Optical pattern comparison by interferometry
| dc.contributor.author | Tenefrancia, Sandra L. | en |
| dc.contributor.department | Physics | en |
| dc.date.accessioned | 2015-06-23T19:09:28Z | en |
| dc.date.available | 2015-06-23T19:09:28Z | en |
| dc.date.issued | 1988 | en |
| dc.description.abstract | By placing two similar input transparencies adjacent to each other in the same plane, and illuminating them with coherent light, it is possible to create parallel fringes that will modulate the composite Fraunhofer diffraction pattern of the two input objects. The power spectrum of the combined inputs, i.e. test and reference signal Fourier transform, is analyzed for regularity of the fringe pattern. The method of interference used on input with small rotational errors and on relatively large displacements of the input does not affect the recognition capabilities of the system. This optical method is useful for making rapid pattern comparisons, where the signal to noise ratio is large. | en |
| dc.description.degree | Master of Science | en |
| dc.format.extent | vi, 55 leaves | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.uri | http://hdl.handle.net/10919/53191 | en |
| dc.language.iso | en_US | en |
| dc.publisher | Virginia Polytechnic Institute and State University | en |
| dc.relation.isformatof | OCLC# 18316097 | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject.lcc | LD5655.V855 1988.T463 | en |
| dc.subject.lcsh | Fourier transform optics | en |
| dc.subject.lcsh | Interferometry | en |
| dc.title | Optical pattern comparison by interferometry | en |
| dc.type | Thesis | en |
| dc.type.dcmitype | Text | en |
| thesis.degree.discipline | Physics | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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