| 摘要 |
<p>PURPOSE:To detect the position of light spot on a wide range by a method wherein the photoconversion element is arranged on both sides of an insulating material having microscopic width in such a manner that the photoelectric power will be increased in proportion to the distance from the insulating band in vertical direction. CONSTITUTION:On the outer circumferential surface of a cylindrical substrate 2, amorphous silicon films 4 and 4' are formed on both sides of the insulating band 3 of microscopic width formed on the circumference of a circle. The film 4 is formed in such a manner that the photoelectric power will be increased as the light source 5 is displaced from O, in the axis of X-X' direction of the conversion element 1, to A and the film 4' is formed in such a manner that the photoelectric power will be increased as the light source 5 is displaced from O' to A'.</p> |
