METHOD AND APPARATUS FOR INSPECTING FRONT SURFACE SHAPE

摘要

A method and an apparatus are provided for accurately inspecting characteristics of a front surface shape by eliminating influences of a rear surface reflection image by a low-cost apparatus constitution. First, a stripe pattern (1), which has a light and dark pattern and in which a reflection image made by being reflected by a front surface of a transparent board-shaped body (3) (object to be inspected) and a reflection image made by being reflected by a rear surface of the transparent board-shaped body are set to separate by an image signal obtained by image pickup, is decided, as a stripe pattern suitable for the transparent board-shaped body. Then, by using the decided stripe pattern (1), the front surface shape of the transparent board-shaped body (3) is evaluated by image analysis by using only the reflection image made by being reflected by the front surface of the transparent board-shaped body (3) of the stripe pattern (1).