Stylus and optical touch panel device

摘要

A stylus (10) includes an end having a surface, an arbitrary area of which is to be moved close to or brought into contact with a desired position on a touch panel (12) of an optical touch panel device. The end includes a light shielding member (104a) configured to block at least part of incident light. The stylus (10) extends along an axis line that passes through a center of gravity (C) of the light shielding member (104a). A distance between a predetermined part of the light shielding member (104a) on the axis line and the arbitrary area is constant.