Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1981-02-13
1983-11-08
Punter, William H.
Optics: measuring and testing
By polarized light examination
With light attenuation
250202, G01B 1124
Patent
active
044139101
ABSTRACT:
The invention relates to a system for detecting and locating surface discontinuity by a light beam; it is more particularly intended for detecting any discontinuity forming a line on this surface, or any discontinuity forming two opposite lines on this surface. In the latter case, this discontinuity may, for example, be the join defined by the opposite edges of two metal sheets to be welded.
REFERENCES:
patent: Re30938 (1982-05-01), Kallen
patent: 2499178 (1950-02-01), Berry et al.
patent: 3518514 (1970-06-01), Moss
patent: 3527953 (1970-09-01), Chitayat
patent: 3609237 (1971-09-01), Gerber
patent: 3881102 (1975-04-01), Willits et al.
Norrie et al., "An Automatic Digital Curve Reader", Jr. Sci. Instrum., 1965, pp. 356-357.
Biava Dominique
Cornu Jean
Detriche Jean-Marie
Galera Richard
Jorge Gerard
Commissariat a l''Energie Atomique
Punter William H.
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