Optical system for the detection of flaws in bottles or the...

Details Optical system for the detection of flaws in bottles or the... Optical system for the detection of flaws in bottles or the...

G - Physics

01

N

340/124.6

G01N 21/90 (2006.01)

Patent

CA 1128167

ABSTRACT OF THE DISCLOSURE In order to enable a laser beam to scan the complete inside surfaces of an empty bottle or the like, two mirrors oscillating about right angular axes are employed which successively reflect the laser beam. The oscillations of the two mirrors are correlated to impart an annular or spiral scanning motion to the laser beam. Subsequently passing through a converging lens, which is focused at the mouth of the bottle being tested, the laser beam enters the bottle for point-by-point scanning all of its sur- faces. The presence of a flaw in the bottle is sens- ed from the intensity of the laser beam that has penetrated, or has been reflected from, the bottle, as by an integrating sphere and a photoelectric detector mounted in position thereon. Various other embodi- ments of the invention and modifications are disclosed.

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