Process for applying a layered structure on a lens

Details Process for applying a layered structure on a lens Process for applying a layered structure on a lens

B - Operations, Transporting

29

D

B29D 11/00 (2006.01)

Patent

CA 2652288

The invention relates to an improvement for applying a layered structure (1) onto a convex surface of a lens (10). After thermoforming the layered structure, a curvature direction of the layered structure is inverted. The structure is then applied on the lens surface by continuously pushing the structure (1) against the lens surface, starting from a contact point between a convex surface of the structure and the convex surface of the lens. The curvature direction of the layered structure is then inverted again, so that it recovers the curvature direction that resulted from thermoforming. Stresses within the layered structure are then reduced, and the structure can be assembled with the lens without defects.

L'invention concerne une amélioration pour appliquer une structure en couches (1) sur une surface convexe d'une lentille (10). Après le thermoformage de la structure en couches, une direction de courbure de la structure en couches est inversée. La structure est alors appliquée sur la surface de la lentille en poussant de manière continue la structure (1) contre la surface de la lentille, en commençant par un point de contact entre une surface convexe de la structure et la surface convexe de la lentille. La direction de courbure de la structure en couches est alors à nouveau inversée de sorte qu'elle récupère la direction de courbure qui résultait du thermoformage. Les tensions à l'intérieur de la structure en couches sont alors réduites et la structure peut être assemblée avec la lentille sans présenter de défauts.

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