The invention concerns a device for electromagnetic rays or radiation beams in the optical spectral domain, in particular for laser beams, comprising at least a deviating element provided with at least one interface with optical function which can, by refraction or reflection, deviate a ray. The interface having the optical function has a curve such that, in one first direction (X) substantially along the interface, the local inclination thereof permanently varies, at least by sections, relative to a direction (Y) substantially along the interface and practically perpendicular to the first direction (X). Advantageously, the interface with the optical function is twisted, preferably shaped like a propeller.

This invention provides a method of extracting corresponding points from plural images with improved reliability and with a shortened process time. In the method of this invention, the extraction of the corresponding points in plural images is achieved by determining the right-side epipolar line, on which the corresponding points should be positioned, by calculation, and transferring candidate corresponding points, obtained on the right-side image by a conventional method for extracting the corresponding points, onto the points of shortest distance on thus determined right-side epipolar line.

The invention concerns a device for optically transforming at least a radiation beam having a width extending in the plane X-Y. The device including optical elements provided with optically active interfaces, arrange in the radiation path. So as to obtain a more homogeneous intensity distribution in the output radiation beam and minimize internal losses, the invention includes at least one optical element in the form of a continuous angular transformation element including an optical interface having, along the x axis, an inclination continuously varying in the radiation direction, relative to the Y axis. The invention further concerns a method for continuously transforming a beam width extending in the X-Y plane, at least in the direction X, with defined divergence distribution.

A new novelty greeting card for providing an amusing illustration therein. The inventive device includes front and back panels pivotally coupled together. The inner side of the back panel has a primary illustration with a plurality of images depicted in a first pose. An animation sheet is positioned on the inner side of the back panel such that the animation sheet covers the primary illustration. One end edge of the animation sheet is coupled to the inner side of the back panel. The animation sheet has a secondary illustration with a plurality of images depicting the images of the primary illustration in a second pose. The other end edge of the animation sheet is coupled to an elongate rod and then rolled about the rod towards the front panel into a cylindrical roll.

The invention relates to an assembly for correcting laser illumination emitted from a laser light source, comprising a laser light source, which has linear emission sources that are arranged in a row in a first direction (X), whereby in addition, the emission sources that are arranged essentially in a row are at least partially offset relative to the row in a perpendicular direction (Y) in relation to the first direction (X). The assembly also comprises corrective elements, which can correct the laser illumination emitted from the laser light source in such a way that the spatial distortion of the laser illumination, caused by the offset position of the emission sources relative to the row, is compensated. According to the invention, the corrective elements are configured as a plate array that comprises a number of plate elements consisting of substantially plane-parallel plates that are transparent to the laser illumination used. At least two of the plate elements have a different thickness and the corrective mans is located in the laser illumination emitted from the laser light source, in such a way that the light beams emitted from at least two emission sources that are offset in relation to one another are subjected to a respective beam offset of a different magnitude by two different plate elements, thus compensating the distortion caused by the offset position of the emission sources. The invention also relates to a method for producing the aforementioned assembly.