Process for producing, by etching through a lenticular grating, images that may be selectively viewed by varying angle of observation
US11143881B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2016 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Oct 3, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B30/26
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A process for producing, under a lenticular grating, in an etching zone, by laser etching, using a tool, a first image and at least one second image that may be selectively viewed by varying angle of observation, the tool including a laser, a galvanometric head and a lens, and defining an optical axis and a working zone, which includes steps of: placing the etching zone in a first location included in the working zone and on the periphery of the working zone, and, perpendicularly to the optical axis, etching the first image; and then placing the etching zone in a second location, which is different from the first location, included in the working zone and on the periphery of the working zone, and, perpendicularly to the optical axis, etching the second image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.