Method for treating glass containers comprising an optical check of a quantity of treatment substance dispensed, and related treatment installation

An installation (2) for treating the inner face (6) of the wall (3) of a glass container (1), which wall (3) delimits an accommodation cavity (4) for a product and an opening (5) providing access to said accommodation cavity (4), said installation (2) comprising:

• a dispensing means (12) for dispensing a treatment substance into said cavity (4), said dispensing means (12) being provided with an orifice (13) for dispensing said treatment substance and being designed so that said dispensing orifice (13) is located at a distance from the opening (5) of the container (1) and outside the latter and to dispense said treatment substance while said container (1) is in motion relative to said dispensing means (12), and
• a check means (17) comprising an image-capture device (16) for capturing, when the dispensing means (12) dispenses said treatment substance, at least one image of a spatial area including the opening (5) of the container (1), and an image-analysis system (18) for determining, by analysing the captured image, whether or not at least a predetermined quantity of said treatment substance has been introduced into the cavity (4) of the container (1) through the opening (5) of the latter.