The defective survey instrument, being the defective survey instrument which measures, the position

摘要

PPROBLEM TO BE SOLVED: To measure the position of a defect by a device of a simple structure dispensing with the positioning of two cameras or calibration when measuring the thickness-wise position of the defect in a transparent plate-like body. PSOLUTION: This defect inspecting device includes a camera, and a half mirror provided between the plate-like body and the camera. This allows images of the defect to be taken by means of the camera through two sight lines of different angles. The position of the defect is calculated based on a displacement amount between the images of the defect taken through the two sight lines. PCOPYRIGHT: (C)2009,JPO&INPIT