Optical security device based on a surface of revolution
AssigneeViavi Solutions Inc.
InventorsVladimir P. Raksha, Cornelis Jan Delst
Life of this patent
Estimating the term…
Abstract
An optical article printed on a substrate may include an organic binder; and a plurality of reflective magnetic platelets provided in the organic binder, wherein the plurality of reflective magnetic platelets are substantially aligned in accordance with at least part of a surface of revolution, and wherein the plurality of reflective magnetic platelets are aligned to cause a first reflective effect of the optical article when the substrate is rotated around a first axis and to cause a second reflective effect of the optical article when the substrate is rotated around a second axis, wherein the first reflective effect is different from the second reflective effect.
Claims20
An optical article printed on a substrate, comprising:
- a plurality of reflective magnetic platelets,
- wherein the plurality of reflective magnetic platelets are aligned to exhibit a funnel-shaped reflection in a view without rotating the substrate around an axis,
- wherein the plurality of reflective magnetic platelets are aligned to cause a reflective effect in a different view,
- wherein the reflective effect is different from the funnel-shaped reflection,
- wherein the reflective effect comprises one of:
- a first lateral motion of a first portion of the funnel-shaped reflection that is different from a second lateral motion of a second portion of the funnel-shaped reflection, or
- a widening or a narrowing of a portion of the funnel-shaped reflection, and
- wherein the different view is different from the view without rotating the substrate around the axis.
An optical article printed on a substrate, comprising:
- a plurality of reflective magnetic platelets,
- wherein the plurality of reflective magnetic platelets are aligned to exhibit a funnel-shaped reflection in a view without rotating the substrate around an axis,
- wherein the plurality of reflective magnetic platelets are aligned to cause a reflective effect in a different view,
- wherein the reflective effect comprises a first lateral motion of a first portion of the funnel-shaped reflection, that is larger than a second lateral motion of a second portion of the funnel-shaped reflection, and
- wherein the different view is different from the view without rotating the substrate around the axis.
An article comprising:
- a plurality of reflective magnetic platelets,
- wherein the plurality of reflective magnetic platelets are aligned to exhibit a funnel-shaped reflection in a first view,
- wherein the plurality of reflective magnetic platelets are aligned to cause a reflective effect in a second view, and
- wherein the reflective effect comprises a first lateral motion of a first portion of the funnel-shaped reflection that is larger than a second lateral motion of a second portion of the funnel-shaped reflection.
Dependencies are inferred from the claim text.