| 摘要 |
PURPOSE:To reduce memory capacity, speed up operation, and to improve an S/N by forming an image from a detected body in a thin, and long linear shape, receiving its detection output and performing arithmetic processing, and detecting the position of the body. CONSTITUTION:Light from the detected body 1 forms a linear image 3 through a semicylindrical lens 2 for obtaining the linear image. When the detected body 1 moves to a position shown by a reference code 4, the linear image 3 changes into an image 5. At this time, a linear position detector outputs a signal which is inversely proportional to the distance from the center position of the incident light to both ends of the linear position detecting element and proportional to the quantity of the incident light from lines l1 and l2 to a position arithmetic processing circuit 7. The position arithmetic processing circuit 7 processes the signal from the linear position detecting element and a correcting circuit 8 corrects an error, and then position data is outputted through a line l3.
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