N° 59
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Mesure de la position d’une plaque transparente Afin de gérer la préhension de plaques de verres il est utile de connaitre sa position. La reflectivité d’une source de lumière visible sur du verre est de 4%, et la seconde surface inférieure est elle de 8% ce qui fiabilise le contrôle.
Position measurement of a transparent glass plate
Glass handling machines must be informed not only about the distance of a glass plate but also about the edge position of a glass plate. However the detection of the edge of a transparent glass plate is not so easy, especially if there is nearly no phase on the edges. The direct reflection rate of visible light on a standard glass surface is normally approximately 4% and with the additional reflection of the second surface around 8% of the light will be reflected.
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