In this paper, the novel technique for investigating the quality of glass bottle by using digital in-line holography (DIH) has been proposed. In our experimental setup, the collimated beam of short coherent laser diode with wave length of 635 nm incident on a glass bottle. Then, the image bearing reflected beam consisted of quality profile of the glass bottle has been recorded on a CMOS camera. By using the experimental results and numerically reconstructed images, the defects inside the glass bottle can be detected and the curvature radius of the bottle has been found. Our technique may be used for glass bottle inspection in the glass bottle making industry.
