Designs on a sphere that exhibit spin induced contrast

Details Designs on a sphere that exhibit spin induced contrast Designs on a sphere that exhibit spin induced contrast

A - Human Necessities

63

B

A63B 37/00 (2006.01)

Patent

CA 2624771

A methodology is disclosed for arranging markings on a ball or sphere where the markings exhibit spin induced contrast when the ball or sphere is rotated at a sufficient speed. The methodology is based on a layout utilizing a plurality of geodesic lines symmetrically arranged around the ball or sphere. Various markings can then be applied on the basis of the layout such that when the ball or sphere is rotated, the markings form contrast lines that are perpendicular to the axis of spin of the ball or sphere, at any axis of spin. These contrast line allow an observer to more accurately detect the axis of spin of the ball or sphere as well as track the ball or sphere in motion.

L'invention concerne une méthodologie destinée à agencer des marquages sur une balle ou une sphère, les marquages présentant un contraste induit par rotation lorsque la balle ou la sphère tourne à une vitesse suffisante. La méthodologie est basée sur une présentation utilisant une pluralité de lignes géodésiques agencées symétriquement autour de la balle ou de la sphère. Divers marquages peuvent alors être appliqués sur la base de la présentation de telle sorte que lorsque la balle ou la sphère tourne, les marquages forment des lignes de contraste qui sont perpendiculaires à l'axe de rotation de la balle ou de la sphère, au niveau d'un axe de rotation quelconque. Ces lignes de contraste permettent à un observateur de détecter plus précisément l'axe de rotation de la balle ou de la sphère ainsi que de repérer la balle ou la sphère en mouvement.

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