Scanning system for e.g. calculating position of pointer, has sensor detecting pointer and mirror image and processor calculating position of pointer, when part of pointer, part of image and sensor run in non collinear manner

摘要

The system (200) has a processor (260) connected with an image sensor (250). A pointer (270) is reflected by a reflecting element (220) to form a mirror image when the pointer approaches a rectangular region of an input field (210), so that the pointer and the mirror image lie in a scanning region of the sensor. The sensor detects the pointer and the mirror image and the processor calculates a position of the pointer, when a part of the pointer adjoining at the region of the input field, a part of the mirror image adjoining at another region and the sensor run in a non collinear manner.