Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1982-07-19
1985-01-08
Rosenberger, R. A.
Optics: measuring and testing
By polarized light examination
With light attenuation
250563, 356394, C21B 724
Patent
active
044924720
ABSTRACT:
The invention relates to a method for determining the shape in a plane to be determined in atmosphere of scattering materials. The method includes comprising the steps of irradiating light on a first line to be determined being imagined on the plane to be determined in the atmosphere of scattering materials to extract a first picture signal at the time of picking up the first line to be determined; at the same time, irradiating light on a second line to be determined being imagined at a position with a prescribed distance apart from the first line to be determined to extract a second picture signal at the time of picking up the second line to be determined; then, subtracting the second picture signal from the first picture signal to extract a fresh picture signal; and operating two-dimensional position coordinates of a first image of line to be determined on the picture in which the first line to be determined has been picked up on the basis of the fresh picture signal to extract three-dimensional position coordinates of the first line to be determined in the plane to be determined through coordinate conversion of the two-dimensional position coordinates. Further, the invention relates to a system in which the scattering materials are cleared away by jetting gas into the atmosphere of scatttering materials prior to picking up of the lines to be determined.
REFERENCES:
patent: 3546377 (1970-12-01), Troll
patent: 3909602 (1975-09-01), Micka
patent: 4171917 (1979-10-01), Pirlet
patent: 4274747 (1981-06-01), Van Beeck et al.
patent: 4315771 (1982-02-01), Bobillon
patent: 4323973 (1982-04-01), Greenfield
Asano Yuichiro
Hirahashi Akira
Kurita Kunio
Momose Atsushi
Ohga Suehisa
Kawasaki Steel Corporation
Rosenberger R. A.
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