Abstract: A calibration template for calibrating a machining device that has blocking elements for blocking an ophthalmic lens, and machining elements for machining the ophthalmic lens, the template including a fastener portion suitable for being fastened to the blocking elements and a calibration portion arranged around the fastener portion. The calibration portion is made out of a material that is suitable for being machined by the machining elements, and presents firstly a plurality of shape patterns, and secondly a plurality of visual identifiers each visually associated with one of the shape patterns.

Abstract: A blocking device (1) includes: a structure (10); a manipulation arm (30) mounted on the structure to be movable between two extreme positions and including gripper element (33) for gripping a blocking accessory for placing on an ophthalmic lens; guide element (50) for guiding the manipulation arm between its two extreme positions along a path that presents a curved portion and an adjacent rectilinear portion; and drive element (70) for changing the position of the manipulation arm and including a gearwheel that meshes with a rack (40). The rack forms part of the manipulation arm and presents a circularly arcuate portion (41) enabling the manipulation arm to be driven along the curved portion of its path, and a rectilinear portion (42) enabling the manipulation arm to be driven along the rectilinear portion of its path.

Abstract: The aim of the invention is to provide a method for making appropriate for trimming a glass comprising a hydrophobic and/or oil-repellent surface coating. According to the invention, it is characterized in that at the surface of said glass a temporary protective layer is coated, imparting to the glass a surface energy at least equal to 15 mJ/m2.

Abstract: The invention relates to a process for polymerising a monomer, polymerizing and/or crosslinking a oligomer, or crosslinking a polymer or copolymer, said monomer, oligomer, polymer and copolymer being selected among precursor monomers, urethane, thiourethane and episulfide oligomers, and urethane, thiourethane and episulfide polymers and copolymers, which comprises: (a) adding to precursor monomers or oligomers or polymers or copolymers an effective amount of at least one complex of Co, Mo or W which under irradiation conditions photochemically reacts to release at least one anionically charged nucleophile or uncharged Lewis base; and (b) irridiating the mixture of (a) to release the at least one anionically charged nucleophile or uncharged Lewis base to initiate polymerisation and/or crosslinking of the monomer, oligomer, polymer or copolymer.

Abstract: The present invention relates to a support structure for a spectacles frame and a front intended to be adapted thereto. The support structure comprises a locking arm or shutter movable in rotation between an open position where it allows to penetrate the projecting element of the front in an interacting hollow housing and a locking position where it is folded back in order to block this projecting element. Application to the realization of spectacles frames having detachable fronts.