| 摘要 |
A device to determine the position of a mobile object with respect to an immobile object, wherein it comprises means to emit a beam of infrared light fixed on the mobile object to illuminate at least partially the immobile object, means to receive the reflected beam fixed onto the mobile object and means to analyze the reflected beam to delimit its variations in intensity, the emission means being constituted by at least one electroluminescent diode whose beam is focused.
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