Abstract: An optical system for LED light projectors utilizing a Fresnel or planar-convex lens that permits a considerable energy saving and an elevated quality of the illumination either in FLOOD or SPOT mode is described. The optical system has a mirror having a particular three-dimensional surface constructed by rotating a parabola and taking sectors so as to obtain a surface that is more closed than a pure parabola. A reflecting optical system for projectors utilizing a Fresnel or planar-convex lens is also described.

Abstract: An optical system for LED light projectors utilising a Fresnel or planar-convex lens that permits a considerable energy saving and an elevated quality of the illumination either in FLOOD or SPOT mode is described. The optical system has a mirror having a particular three-dimensional surface constructed by rotating a parabola and taking sectors so as to obtain a surface that is more closed than a pure parabola. A reflecting optical system for projectors utilising a Fresnel or planar-convex lens is also described.

Abstract: The invention relates to a device for adjusting light intensity for discharge lamp projectors with an optical assembly that contains a spherical mirror and a discharge lamp, and a Fresnel lens provided in front of the lamp of the optical assembly. The device is characterized in that an iris diaphragm (5) is provided on the optical assembly, in front of the lamp, in correspondence with the focus of the optical assembly.

Abstract: The invention relates to a device for adjusting light intensity for discharge lamp projectors comprising an optical assembly (1) comprised of a discharge lamp (3) and a spherical mirror (2), and of a Fresnel lens (4), provided in front of the lamp (3) of said optical assembly (1), characterised in that an iris diaphragm (5) is provided on said optical assembly (1), in front of the lamp (3), in correspondence of the focus of the optical assembly (1).

Abstract: The invention concerns an electronic device, or dimmer, for regulating the power supply applied to a load (4), the device comprising an insulated gate bipolar transistor or IGBT (1), the IGBT (1) having a first operating mode in which it is off and does not allow any current to pass, a second operating mode in which it is on and the current passing therein is substantially limited by characteristics of an external circuit connected to it, and a third linear region operating mode, in which the current passing therein is limited by a value proportional to the gate voltage, the IGBT (1) being connected to a rectifier bridge (2), apt to be connected to a load (4) and to a mains (5) connected in series to each other, the device further comprising a processing and controlling unit, the device being characterised in that said processing and controlling unit includes digital processing means (6, 7) and in that the device comprises ramp generating means (17, 18) driven by said processing and controlling unit, apt to g

Abstract: The invention relates to an improved lifting apparatus (1), particularly for lighting fittings and not, for shooting studios, comprising a pair of pantograph structures (2, 3), provided side by side, spaced and substantially parallel each other, provided above with coupling suspension means (7) and at the bottom with means (8) for coupling the fitting to be lifted, motorization means (10), to operate both said parallelogram structures, provided above, between said two parallelogram structures (2, 3), and coupling means to connect said motorization means with each one of said parallelogram structures, said apparatus (1) being characterized in that the upper and lower end arms (4) of each one of said pantograph structures are provided with teeth (12) meshing with corresponding teeth (12) provided on the corresponding arm of the same pantograph structure (2, 3).

Abstract: The invention concerns an electronic device, or dimmer, for regulating the power supply applied to a load (4), the device comprising an insulated gate bipolar transistor or IGBT (1), the IGBT (1) having a first operating mode in which it is off and does not allow any current to pass, a second operating mode in which it is on and the current passing therein is substantially limited by characteristics of an external circuit connected to it, and a third linear region operating mode, in which the current passing therein is limited by a value proportional to the gate voltage, the IGBT (1) being connected to a rectifier bridge (2), apt to be connected to a load (4) and to a mains (5) connected in series to each other, the device further comprising a processing and controlling unit, the device being characterised in that said processing and controlling unit includes digital processing means (6, 7) and in that the device comprises ramp generating means (17, 18) driven by said processing and controlling unit, apt to g

Abstract: The invention relates to a lifting apparatus, particularly for lighting fittings. The lifting apparatus comprises a pair of pantograph structures which are spaced apart, substantially parallel, and facing each other. The lifting apparatus further includes a suspension coupling and means at the bottom thereof for coupling the fitting to be lifted. Motorization means to operate both the parallelogram structures are provided between the two parallelogram structures. Connection means associated with the motorization means are associated with each one of the parallelogram structures.

Abstract: The invention relates to an improved lifting apparatus (1), particularly for lighting fittings and not, for shooting studios, comprising a pair of pantograph structures (2, 3), provided side by side, spaced and substantially parallel each other, provided above with coupling suspension means (7) and at the bottom with means (8) for coupling the fitting to be lifted, motorization means (10), to operate both said parallelogram structures, provided above, between said two parallelogram structures (2, 3), and coupling means to connect said motorization means with each one of said parallelogram structures, said apparatus (1) being characterized in that the upper and lower end arms (4) of each one of said pantograph structures are provided with teeth (12) meshing with corresponding teeth (12) provided on the corresponding arm of the same pantograph structure (2, 3).

Abstract: A process for cold- and hot-working of methacrylate optic conductors (M), of cylindric or of any other shape, that allows a beam of light, inserted into said conductors, to be totally inwardly reflected according to the angles contained in the limit angle of the total internal reflection, and determines the emission according to beam angles—in theory—180° amplitude but, in the practical industrial realizations, of 30° or 56°, from the section of the conductor opposed to the one carrying the reflection means (2).