CIRCUIT PATTERN DETECTING DEVICE AND CIRCUIT PATTERN DETECTING METHOD

摘要

A transparent electrically conductive layer is formed under a glass board. Both surfaces of an electro-optical crystal layer are formed with a reflection-preventive layer and a reflecting layer. The surface (under-side surface) of the transparent electrically conductive layer has a reflection-preventive layer in the form of an electro-optical crystal layer stuck thereto through an adhesive layer. That is, the reflection-preventive layer (14) is provided between the adhesive layer (13) and the electro-optical crystal layer (15).