Method and apparatus for detecting position/variance of input light using linear and quadratic outputs
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United States of America Patent
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Oct 17, 1989
Grant Date -
N/A
app pub date -
Sep 25, 1987
filing date -
Sep 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for detecting position/variance of input light is disclosed which includes 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 quandratic ouput 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.
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