Device for detecting air bubbles in a container filled with liquid, said device comprising; an illumination unit for irradiating the container with light, and a recording unit for recording an image of the container irradiated by the illumination unit, wherein the illumination unit comprises at least two light sources (41, 42, 43) which differ from one another in their spectral light colour and/or their polarisation, wherein the device further comprises an evaluation unit which is designed to infer the presence of an air bubble during an evaluation of the image of the recording unit on the basis of a specific arrangement of the light beams, which can be distinguished from one another, emitted by the light sources (41, 42, 43), wherein the container can be arranged between the illumination unit and the recording unit, and the illumination unit and the recording unit face each other, in order to provide transmitted light illumination of the container, and wherein the recording unit is positioned in such a way i) that the light beams emitted by the at least two light sources (41, 42, 43) do not penetrate into the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in the direction of the recording unit, or ii) that the light beams emitted by the two light sources (41, 42, 43) have a continuous or uniform intensity in the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in such a way that an intensity increase of light beams of the at least two light sources (41, 42, 43) detectable by the recording unit results, wherein the light beams of the at least two light sources (41, 42, 43) do not run parallel to one another in an inspection area for the container. an illumination unit for irradiating the container with light, and a recording unit for recording an image of the container irradiated by the illumination unit, wherein the illumination unit comprises at least two light sources (41, 42, 43) which differ from one another in their spectral light colour and/or their polarisation, wherein the device further comprises an evaluation unit which is designed to infer the presence of an air bubble during an evaluation of the image of the recording unit on the basis of a specific arrangement of the light beams, which can be distinguished from one another, emitted by the light sources (41, 42, 43), wherein the container can be arranged between the illumination unit and the recording unit, and the illumination unit and the recording unit face each other, in order to provide transmitted light illumination of the container, and wherein the recording unit is positioned in such a way i) that the light beams emitted by the at least two light sources (41, 42, 43) do not penetrate into the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in the direction of the recording unit, or ii) that the light beams emitted by the two light sources (41, 42, 43) have a continuous or uniform intensity in the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in such a way that an intensity increase of light beams of the at least two light sources (41, 42, 43) detectable by the recording unit results, i) that the light beams emitted by the at least two light sources (41, 42, 43) do not penetrate into the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in the direction of the recording unit, or ii) that the light beams emitted by the two light sources (41, 42, 43) have a continuous or uniform intensity in the recording area of the recording unit when passing through the container, which is free of air bubbles or other foreign particles, and when they hit an air bubble or a glass particle are deflected in such a way that an intensity increase of light beams of the at least two light sources (41, 42, 43) detectable by the recording unit results, wherein the light beams of the at least two light sources (41, 42, 43) do not run parallel to one another in an inspection area for the container.