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.

Abstract: A method for verifying a security device including an image having a signature. The method may include operations for acquiring the image in order to obtain a first representation of the image, extracting the signature, and verifying the signature. Also included are implementations in the form of a verification apparatus, a computer program, and a computer data medium including such a computer program.

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.

Abstract: A method for verifying a security device including an image having a signature. The method may include operations for acquiring the image in order to obtain a first representation of the image, extracting the signature, and verifying the signature. Also included are implementations in the form of a verification apparatus, a computer program, and a computer data medium including such a computer program.

Abstract: A method for producing a pattern in relief in a thin plastic card, includes the following steps: producing a stack of layers including, in the following order: a transparent layer, a special layer, a black surface, and a substrate layer, and drawing the pattern by a laser through the transparent layer.

Abstract: A method for producing a pattern (6) in relief (10) in a thin plastic card (1), includes the following steps: producing a stack of layers including, in the following order: a transparent layer (2), a special layer (3), a black surface (4), a substrate layer (5), drawing the pattern (6) by a laser (7) through the transparent layer (2).