Method and apparatus for detecting position/variance of input light.

摘要

An apparatus for detecting position/variance of input light is disclosed which comprises a photoelectric conversion device receiving input light constituted of a first resistive layer formed of a first photoelectric conversion material and a second resistive layer formed of a second photoelectric conversion material connected with the first resistive layer through a depletion layer or directly, wherein the first resistive layer is provided with uniform resistivity throughout its surface so that a linear output proportional to the average of the distances between one end of the photoelectric conversion device and positions of the input light is detected and the second resistive layer is provided with resistivity dependent upon the distance from its one end so that a quadratic output proportional to the average of the squares of the distances between one end of the photoelectric conversion device and positions of the input light is detected.