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9 di 11 brevetti
Abstract: A device 1 for measuring an angular inclination and angular inclination fluctuations of an electromagnetic radiation beam is described. This device is adapted to detect the incidence angular inclination θ and the relative fluctuations Δθ with respect to a nominal axis of propagation of the beam, in a desired detection plane comprising the nominal propagation axis. The device 1 comprises a first screen 11, a second screen 12 and at least one first electromagnetic power and/or energy detector Ps. The first screen 11 comprises a first slit S1 having a first slit dimension d1 along a first direction x1 on a detection plane transverse to the first slit. The first slit S1 is adapted to determine, when crossed by the beam, a diffraction of the beam, so as to generate downstream of the first screen 11 a diffracted electromagnetic field having on the detection plane a diffraction pattern dependent on the aforementioned angular inclination of incidence θ of the beam. The second screen 12 comprises a second slit S2 having a second slit dimension d2 along a second direction x2, parallel to the aforementioned first direction x1 on the detection plane. The second slit S2 is parallel to the first slit S1 in a direction y perpendicular to the aforementioned first and second directions (x1, x2), and is arranged in a selection position (X) on a scale defined on the second direction x2. The second screen 12 is arranged downstream of the first screen, with respect to the propagation of the beam, and is configured to shield the diffracted electromagnetic field with the exception of a transmitted portion of diffracted electromagnetic field, passing through the second slit S2. The at least one first electromagnetic power and/or energy detector Ps is arranged downstream of the second slit S2, with respect to the propagation of the beam, and is configured to detect the electromagnetic power and/or energy of the transmitted portion of diffracted electromagnetic field, dependent from the diffraction figure. This at least one first electromagnetic power and/or energy detector Ps is further configured to generate a first electrical signal Vs, based on the detected electromagnetic power and / or energy. Since the power and/or electromagnetic energy detected by the first detector depends on the geometry, or on the diffraction pattern, of the diffracted electromagnetic field, which in turn depends on the incidence angular inclination θ of the beam in the detection plane, the aforesaid first electrical signal Vs is representative of the angular inclination of incidence θ of the beam in the detection plane. A system and a method for measuring an angular inclination and angular inclination fluctuations of an electromagnetic radiation beam, using the aforementioned device, are also described. A method for measuring a spatial shift s of a focused laser beam, at the focusing point, with respect to a reference optical axis, is also described.
Autori: Simone Cialdi, Daniele Ernesto Cipriani, Stefano Capra, Zeudi Mazzotta
2021
Abstract: A method for demultiplexing and demodulating (in particular, "locally" demultiplexing and demodulating) amplitude-modulated signals grouped by means of orbital angular momentum multiplexing is described. The method involves demultiplexing and demodulating information a(t), b(t) modulated on each of a first modulated beam Fm1 and at least one second modulated beam Fm2, based on phase difference values AP and AR detected by beam detectors located downstream of an interferometric structure 40 to which two portions of the electromagnetic beam carrying the modulated channels are provided as inputs, multiplexed in the orbital angular momentum variable. There is also described a corresponding system 100 for demultiplexing and demodulating amplitude-modulated signals capable of implementing the aforesaid method.
2020
Abstract: A method for transmitting and receiving an electromagnetic radiation beam, adapted to determine an orbital angular momentum of the received electromagnetic radiation beam, is described. There is further described a system for transmitting and receiving an electromagnetic radiation beam, capable of performing the aforesaid method. A method for performing a telecommunication of signals modulated according to any modulation technique and grouped by means of orbital angular momentum multiplexing is further described There is further described a telecommunication system capable of performing the aforesaid method for performing a telecommunication of modulated signals.
2020
Abstract: La presente invenzione riguarda un precursore polimerico sintetico con struttura a pettine o iper-ramificata, in grado di effettuare una transizione sol-gel irreversibile in situ tramite foto-reticolazione, in condizioni compatibili con un organismo biologico, per produrre idrogeli in grado di agire come matrici tridimensionali biocompatibili e biodegradabili adatte per l’incapsulamento e la veicolazione in vitro e in vivo di: cellule; farmaci; peptidi; proteine e fattori di crescita. In particolare, l’invenzione concerne un precursore polimerico foto-reticolabile, somministrabile in vivo tramite iniezione o approcci chirurgici mini-invasivi, detto precursore polimerico.
Autori: Cristina Lenardi, Federico Martello, Valentina Pistis, Margherita Tamplenizza, Alessandro Tocchio
2015
Abstract: Viene descritto un metodo per la misura di segnali generati da un rivelatore di particelle e/o radiazioni ionizzanti, detti segnali essendo resi disponibili alle uscite del rivelatore sotto forma di cariche elettriche, comprendente i passi di: rimuovere tutte dette cariche elettriche a tasso costante da dette uscite del rivelatore; misurare il tempo necessario per la rimozione di tutte dette cariche elettriche; convertire detto tempo in una misura della quantità di dette cariche elettriche.
Autori: Alberto Pullia
2014
Abstract: front page image (EN)A method is described for producing a microfluidic device (19), which comprises the phases of producing a three-dimensional template (15) of geometry equal to the channelings that is desired to obtain in the device; inserting the template in the desired position into a mould (16), keeping it suspended by at least one of its end; coating said template by immersion in (or deposition of) a material in the liquid phase (or dissolved or dispersed in a solvent) capable of solidifying by means of a chemical reaction or physical transformation, forming a material constituting the body of the final device; and selectively removing the three-dimensional template. In a variant of the method, useful for the production of scaffolds to be inserted into the human body, a porogenic material is added to the liquid precursor or to the precursor solution, such that the material of the solid matrix is characterised by a continuous structure of pores into which it is possible to insert live cells.
2012
Abstract: A method of measuring properties of particles comprises the steps of generating a beam of radiation (IW); illuminating with the beam (IW) an observation region (MR) which is transited by a particle (B), a portion of the beam (IW) giving rise to radiation (SW) which is scattered by scattering interaction with the particle (B), and another portion (TW) being transmitted substantially undisturbed through the observation region (MR); and detecting, in a detection plane (M), a plurality of radiation intensity values which are determined by the interference between the scattered radiation (SW) and the transmitted radiation (TW). The detection of the radiation intensity values in the detection plane (M) is carried out according to a time sequence of acquisitions corresponding to successive transit positions of the particle through the observation region (MR). On the basis of the time sequence of acquisitions, the trend of a parameter of asymmetry of the distribution of the plurality of radiation intensity values with respect to the optical axis (z), due to the successive transit positions of the particle (B), is determined as a function of time. Depending on the trend of the parameter of asymmetry determined as a function of time, the trends of phase delay and amplitude of the scattered radiation (SW) with respect to the transmitted radiation (TW) are determined as a function of time, and the properties of the particle (B) are determined on the basis of the trends of the phase delay and amplitude of the scattered radiation (SW) as a function of time.
Autori: Marzio Giglio, Marco Alberto Carlo Potenza
2010
Abstract: Use of sol. polyamidoamines having a mol. wt. comprised from about 3.000 Da to about 120.000 Da, more preferably from about 5.000 Da to about 40.000 Da, to promote adhesion, growth and differentiation of cultured cell lines and primary cell cultures on cell-growth supporting substrates.
Autori: Elisabetta Ranucci, Paolo Ferruti, Cristina Lenardi, Michela Matteoli
2010
Abstract: The present invention concerns clinical auscultation devices that allow the auscultation of heart and lung sounds, and more specifically a digital auscultation device according to the preamble of claim 1 and an operating method of such a device according to claim 11.
Autori: Stefano Riboldi, Enrico Spoletini, Marco Riva, Federico Belloni
2009