Demonstrator of qualities of a spectacle lens material
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsCarole NADOLNY, Fabien CALANDRINI
Life of this patent
Estimating the term…
Abstract
A demonstrator (1) of qualities of a spectacle lens material, includes a hollow base (10) which is open through an observation window (13), and a lens (20) which closes the observation window and includes at least one part (21) made of the spectacle lens material. The demonstrator includes at least two separate demonstration elements selected from the following list: an electrostatic element (50) that can move under the action of an electrostatic attraction; an ultraviolet mark (43) which allows the ultraviolet light to be viewed with the naked eye; and an abrasive element (30) suitable for scratching the demonstrator lens (20).
Claims13
A demonstrator of properties of a spectacle eyeglass material, comprising:
- a hollow holder apertured with an observation window;
- and
- a lens that closes said observation window and that comprises at least one portion made from said spectacle eyeglass material;
- wherein the demonstrator comprises at least two distinct demonstrating means chosen from the following list:
- an electrostatic element that is freely housed in the hollow holder and that is capable of moving under the action of an electrostatic force;
- an ultraviolet mark that is located in the hollow holder so as to be observable through said lens and that appears when it is illuminated with ultraviolet light;
- and
- an abrasive element that is movably mounted on the hollow holder and that is suitable for scratching said lens.
Dependencies are inferred from the claim text.