Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1995-06-05
1997-01-14
Rosenberger, Richard A.
Optics: measuring and testing
By polarized light examination
With light attenuation
356241, 356381, G01B 1124
Patent
active
055945481
ABSTRACT:
A machine for inspecting the surface conditions of structural members within a furnace, particularly within a furnace operating at a high temperature or with a highly radioactive environment, such as a melting furnace for processing radioactive wastes. The machine comprises a laser-transmission optical fiber incorporated with a laser projector at one end thereof inserted into the furnace and being connected to a laser beam source outside the furnace; a fiberscope incorporated with the objective portion at one end thereof inserted into the furnace and being connected to an image sensor located outside the furnace; means for calculating the distance to a structural wall surface on which the laser beam from a tip portion of the inspection machine has fallen, by subjecting an image from the image sensor to image processing; a double-walled tube of a structure such that the laser-transmission optical fiber is incorporated through an inner tube thereof, and a coolant introduced into a passageway within the inner tube returns in the vicinity of the laser projector at the tip portion; and a double-walled tube of a structure such that the fiberscope is incorporated through an inner tube thereof, and a coolant introduced into a passageway within the inner tube returns in the vicinity of the objective portion at the tip portion.
REFERENCES:
patent: 4508448 (1985-04-01), Scholdstrom et al.
patent: 4708482 (1987-11-01), Netheisel
patent: 5127736 (1992-07-01), Neiheisel
patent: 5223908 (1993-06-01), Scott et al.
Adachi Junichi
Igarashi Hiroshi
Kobayashi Hiroaki
Uehara Hirotaka
Usui Shinichi
Doryokuro Kakunenryo Kaihatsu Jigyodan
Kawasaki Jukogyo Kabushiki Kaisha
Kim Robert
Rosenberger Richard A.
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