Abstract: A radiation source position detection system is provided, wherein three radiation detectors are arranged at different positions. Based on radiations incident to each of the radiation detectors, curved surfaces where a radiation source exists are calculated. By solving equations of each of the curved surfaces simultaneously, the position of the radiation source is detected.

Abstract: Disclosed herein is an image sensor. The image sensor has a CdTe plate, a plurality of hole-type electrodes, and a voltage-applying unit. The hole-type electrodes are arranged at predetermined intervals in the direction of thickness. The voltage-applying unit applies a voltage to the hole-type electrodes. One of the electrodes is not adjacent to any other electrode and is used as an anode. The remaining electrodes are used as cathodes. A sensor-element array is provided on the detecting surface of the image sensor. The array comprises a plurality of sensor elements arranged in the form of a matrix. Each sensor element comprises an anode, a plurality of cathodes, and CdTe lying between the anode and the cathodes.

Abstract: Rays incident upon a plurality of detection plates arranged along a normal direction are detected. A distance between the ray and the ray source is estimated based on the number of counted rays detected by each detection plate, and each interval distance of the detection plates. Moreover, the direction of the source of the ray is estimated based on each image obtained from each detection plate.

Abstract: An image sensor has a three-dimensional structure in which a sensor element array having a plurality of sensor elements consisting of CdTe, arranged in a two-dimensional matrix, is mounted to an IC substrate via a connection layer. The connection layer has a plurality of stud bumps and a plurality of thin film layers. The stud bumps are formed on an electrode of each IC and are provided in the connection layer in order to fetch a signal detected by each sensor element. The thin film layers are formed at the distal end of each stud bump, and are electrically connected with an electrode of each sensor element.