Abstract: An optical process for the programmable time profile shaping of quasi-monochromatic optical pulses, involves the following steps: (1) spectral components of a wide spectrum pulse are spread out over time, and a stretched pulse with frequency drift is obtained, while conserving spectral width; (2) the pulse is spectrally shaped and, as a consequence, time shaped; and (3) the wide spectrum is converted into a narrow spectrum, while conserving time shaping.

Abstract: An assembly collar, in particular for street fixtures, having a portion (1) for mounting on a support post, provided with a hole (2) of a diameter corresponding to that of the post and provided with a cutout (3) in a median longitudinal plane perpendicular to the axis of the hole (2) and permitting its interfitting into a corresponding cutout of a corresponding collar. The collar has a tubular recess (4) with an axis parallel to that of its hole (2) for securement on the support post, the collar being in two independent half portions interconnected in service position by means of at least one screw or a gripping bolt (5). The invention is applicable in the field of assemblies of tubular structures, particularly urban fixtures, and in particular devices useful as fixed barriers or the like.

Abstract: An assembly node for tubular structures in the form of two half-shells (1) joined together by bolts and provided with corresponding recesses (2) and/or holes (3) for the insertion and blocking of the ends of tubular elements (4 and 5). The assembly node is provided, for each end of a tubular element (5) to be mounted in at least one hole (3) of a half-shell (1), outside the joint planes (6), with at least one independent element (10) for holding and gripping the end without play. The assembly is more particularly applicable in the field of tubular structures, in particular tubular constructions, sport and leisure time equipment, as well as scaffolding and exhibition materials.

Abstract: An assembly device for flat pieces (2) and tubular elements (1) comprises elements for securement of the flat pieces (2) on the infrastructure tubular elements (1). The securement elements are provided each with at least one element (5) for prepositioning and gripping on the infrastructure tubular elements (1). The device is more particularly applicable to the field of the assembly of structural elements in the form of flat pieces and tubular elements, in particular for leisure equipment, especially playground equipment for children.