Portable electronic device and imaging system

摘要

The portable electronic device in the form of a mobile phone (100) includes a display (11) for displaying an image, and a camera (20) supported by a bearing (31) and a hinge module (32) for forward and reverse rotation so as to be able to take pictures of images, which can be displayed on the display, from a front side to a rear side of the display. A reflector (34) is rotated in accordance with the rotation of the camera and has a plurality of areas "A", "B", "C" of different reflection factors arranged along its circumferential direction. For determination of a control mode, a reflective photosensor (44) optically detects the rotational position of the camera by projecting a beam of light toward the reflector and by receiving the light reflected from the reflector. <IMAGE>