On-line detection device for defects of glass coating surface

The utility model provides an on-line detection device for defects of a glass coating surface, and belongs to the technical field of glass detection. The device comprises a line light source module, an imaging module and a terminal data processing module connected with the output end of the imaging module, and light emitted by the line light source module can irradiate the coated surface of the glass and irradiate into the glass below the coated surface of the glass. Light emitted by the line light source module is reflected by the film-coated surface to form first reflected light, the light irradiates the bottommost surface of the glass and then is reflected to form second reflected light, and if the film-coated surface of the glass has no defect, the imaging module can receive the first reflected light and cannot receive the second film-coated surface. And the terminal data processing module judges whether the coated surface of the glass has defects or not according to the image output by the imaging module