Process for producing, by etching through a lenticular grating, images that may be selectively viewed by varying angle of observation
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United States of America Patent
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Oct 12, 2021
Grant Date -
Mar 28, 2019
app pub date -
Dec 21, 2016
filing date -
Dec 23, 2015
priority date (Note) -
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status (Latency Note)
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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.
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