The invention relates to the technical field of optical detection, in particular to a glass
bottle surface spraying quality detection method which comprises the following steps: under a specified
wavelength, acquiring target incident light by adjusting a polarization angle, irradiating a glass
bottle spraying layer, collecting a transmission spectrum
signal to calculate parallel and vertical polarization transmissivity and ratio of the spraying layer, and generating polarization transmissivity. According to the method, the light with the polarization angle irradiates the spraying layer, the polarization component of the transmission light is obtained, the thickness uniformity and the internal structure are analyzed, weak areas, particle flaws and excessive spraying of the spraying layer are recognized, the defect detection precision is improved, multi-angle transmissivity data are collected, the change rate is calculated, and color deviation and thickness abnormity are accurately positioned; through cross analysis of multiple optical parameters, evaluation of
adhesive force, curing quality and
color consistency is more detailed, spraying abnormity is classified, multiple detection means act synergistically, interference such as environment illumination and material
reflectivity is reduced, and the detection accuracy of spraying quality is improved.