Loading patent…
AssigneeOvegipari Muvek
InventorsDobi Imre, Peter Karabelyos, Janos Kugyela, Bela Toth
Estimating the term…
The invention relates to a process for the integral optical examination of damaging mechanical stresses arising in the bottom-part of bottles and hollow glasswares. In accordance with the process the bottom-part of the glasses/bottles/is illuminated with a light bundle from the mouth, the cross-sectional intensity distribution is controlled by the aid of a light bundle with predetermined angle of aperture, with the integral optical system the bottom is illuminated with a light with quasi-homogeneous intensity. The passing light is modulated and led into the photodetector, the signal of which is analysed through a band-filter. The invention includes the apparatus for the implement of the process according to the invention. The apparatus has a laser (1), a laser bundle (2) emitted therefrom, a polar filter (3), connected with a light-chopper (4), a bundle stretcher consisting of the collecting lenses (5,6), the diaphragm (8), a polar filter (14) and the photodetector (15).
A process for the integral optical examination of mechanical stresses in the bottom of a transparent container, which comprises the steps of;
Apparatus for the integral optical examination of mechanical stresses in the bottom of a transparent container, which comprises, in successive order a light source for emitting a light beam having a diameter and an angular divergence, means for polarizing said light light beam, a modulator for modulating the pulse frequency of said light beam, means for optically expanding the diameter of said light beam and for reducing the angular divergence thereof, means for sampling a substantially uniform intensity of the cross section of said light beam, means for substantially uniformly illuminating the bottom of said transparent container without illuminating side walls of said container, means for collecting the light beam, analyzer polarizing means for filtering out that part of the light beam having a plane of polarization perpendicular to the plane of polarization of said analyzer polarizing means, a photodetector for converting into an electrical signal the light beam passed by said analyzer polarizing means, means for substantially filtering out the effect of ambient light from said electrical signal, and means for correlating the strength of said signal to stresses in the bottom of said transparent object.
Dependencies are inferred from the claim text.