US 2019/0094559 A1Published application

Process for producing, by etching through a lenticular grating, images that may be selectively viewed by varying angle of observation

AssigneeIdemia France

InventorsCoralie VANDROUX, Yvonnic MOREL, Benoit BERTHE

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Abstract

Disclosed is 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 and the process including the following steps: 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.

Claims20

Dependent claims

A method for producing a first image and at least one second image, that can be selectively viewed by varying the angle of observation, under a lenticular grating (9), in an etching zone (6), by laser etching, by means of a setup (1) comprising:

a laser (2) capable of emitting a laser beam (12), a galvanometric head (3) capable of deflecting the laser beam (12) and a lens (4) capable of focusing the laser beam (12), and defining an optical axis (Z) and a working zone (5), the method comprising:
placing of the etching zone (6) at a first location (7), included in the working zone (5), at the periphery of the working zone (5), and at right angles to the optical axis (Z),
etching of the first image,
placing of the etching zone (6) at a second location (8) different from the first location (7), included in the working zone (5), at the periphery of the working zone (5), and at right angles to the optical axis (Z),
etching of the second image.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/065,999Filed 21 Dec 2016
Priority: FR 156324423 Dec 2015
Published: 28 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

G02B 30/27
Of the autostereoscopic type: involving lenticular arrays
B41M 3/148
Security printing: transitory images, i.e. images only visible from certain viewing angles
B41M 5/24
Duplicating or marking methods; Sheet materials for use therein: ablative recording, e.g. by burning marks; Spark recording
B42D 25/324
Identification or security features, e.g. for preventing forgery: reliefs