Device for the testing of bodies comprising periodic structures

Details Device for the testing of bodies comprising periodic structures Device for the testing of bodies comprising periodic structures

1982-03-25

1985-02-12

Wise, Edward J.

Boots, shoes, and leggings

364485, 378 58, 378 98, G01N 2300

Patent

active

044995407

ABSTRACT:
The invention relates to a device for testing a body which comprises periodic structures. The device includes an image forming device for determining measurement signals representing the periodic structures, and a further electronic device. This electronic device forms the frequency spectrum from neighboring measurement values in the direction of the periodic body structures, suppresses the fundamental and higher harmonics (G,B.sub.1,B.sub.3) of the periodic structures in the relevant spectrum, and retransforms the spectrums thus modified for application to an image evaluation device.

REFERENCES:
patent: 4211926 (1980-07-01), Nakaya et al.
patent: 4213183 (1980-07-01), Barron et al.
patent: 4293912 (1981-10-01), Wlaters
patent: 4321680 (1982-03-01), Bertrand et al.
patent: 4326252 (1982-04-01), Kohno et al.
patent: 4394738 (1983-07-01), Wagner
patent: 4415980 (1983-11-01), Buchanan

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