The automatic online defect inspection system for glass based on linear array CCD is investigated.High-speed linear array CCD is used to collect light intensity signals from the glass ribbon under irradiation by Dual CCFL.Characteristic signals of typical defects are analyzed

and method of determined system detection resolution is given.The mode of data transmission is based on double-DMA and data are processed by ternaryzation.Only the amplitude and coordinate of defect data are stored and others are discarded.The experiment results are shown that the system detection resolution is 0.1 mm and recognizable rate of defect style is 99 %.