Inspection manner of glass substrate for flat-panel display and glass substrate for flat-panel display

摘要

This invention designates that the defectiveness of the distortion with the display which originates in the region which possesses the optical deformation which exists in the glass substrate for the flat-panel display is grasped as topic. With the inspection manner which relates to this invention, from the illuminant until image pickup means when it shades portion of light from the illuminant with the sun shade, making light from the illuminant the glass substrate for the flat-panel display transmit on the optical path, it creates the graphics data of the glass substrate which reflects the region which possesses the optical strain by image pickup doing with image pickup means. When being 3 times that or less the longest length the longest length A in the region which possesses the optical strain which is included in this graphics data in the subpixel of the flat-panel display, the glass substrate is decided as the non-defective item, when being other than that, the glass substrate is decided as the defective.