Radiation detector and light or radiation detector

摘要

A shielding plate is made of a conductive material connected to a ground. The shielding plate is arranged between a photo timer for measuring an amount of the radiation and a radiation-sensitive semiconductor thick film over an entire surface of an effective area for X-ray detection. The shielding plate shields a radiation noise from the photo timer, and thus the radiation noise can be released by connecting the shielding plate to the ground. As a result, the radiation noise from the photo timer which has influence on the radiation detector can be reduced.