Abstract: A method for manufacturing a synthetic image device includes providing of a focusing element array. An image layer is arranged in a vicinity of a focal distance of focusing elements of the focusing element array, whereby a synthetic image composed of enlarged portions of the image layer becomes perceivable for a viewer. The image layer includes an array of image cells, each being associated with a respective focusing element and wherein the array of image cells has a same symmetry and element distance as the focusing element array. The arranging includes creating continuous image objects within the image cells such that synthetic images to be viewed, all having contributions from one of the continuous image objects, present smooth successive non-parallax alterations upon changing a viewing direction. This creation is performed according to an array of digital image cells of a digital image layer model.

Abstract: A synthetic-image device comprises an image layer and a focusing element array. The image layer is arranged in a vicinity of a focal distance of focusing elements of the focusing element array. The image layer comprises composite image objects. The composite image objects of the image layer being a conditional appearance of at least a first set of image objects, dependent on a second set of image objects. The first set of image objects and the second set of image objects are arranged for giving rise to at least a first and second synthetic image, respectively, at a non-zero height or depth when being placed in a vicinity of a focal distance of focusing elements and viewed through the focusing element array. Manufacturing of synthetic-image devices based on the same concept is also disclosed.

Abstract: A synthetic-image device comprises an image layer and a focusing element array. The image layer is arranged in a vicinity of a focal distance of focusing elements of the focusing element array. The image layer comprises composite image objects. The composite image objects are a conditional merging of a first set of image objects, an envelope area associated with the first set of image objects and a second set of image objects. The envelope area covers the first set of image objects and comprises a margin area not covering the first set of image objects. The conditional merging is constituted by that the composite image objects are present only in points where the first set of image objects exists or in points where the second set of image objects exists, but the envelope area associated with the first set of image objects does not exist.

Abstract: Disclosed are a method and device for the identification of the leakiness of a neutron-capturing pencil, or control rod, of a nuclear reactor. The pencil is placed in an impervious chamber filled with an aggressive chemical solution. The solution is put under pressure in order to make it penetrate the defective pencil, then this pressure is relaxed in order to enable the solution to go out of the presumably defective pencil in the impervious chamber. The solution is analyzed in order to show up metallic salts of the constituent elements of the core of the pencil. Application is to routine checks on neutron-capturing pencils of a pressurized-water nuclear reactor.