Semiconductor light beam position sensor, and image input device using this sensor.

摘要

The semiconductor light beam position sensor element (2) of this invention comprises a semicondcutor layer (18) consisting of p-, i-and n-type semiconductor layers (12, 14, 16) successively bonded in junction and an electrically conductive layer (20, 22) disposed on either side of said semiconductive layer (18), at least one of the conductive layers (20, 22) being made of a transparent material, at least the other conductive layer (20, 22) and the semiconductor layer (18) being provided with a multiplicity of common apertures (23) running in the thickness direction and at least one conductive layer (20, 22) being provided with one pair or two pairs of electrodes (24...27) of opposite polarities as disposed in its marginal regions. This sensor element is light transparent. A position sensor and a picture image input device utilizing the above sensor element (2) are also disclosed.