HIGH-POWER DYNAMIC LENS

A dynamic lens for projecting different output beam shapes includes a first light source of laser diodes generating a first light beam toward a target. A projector generates a second light beam with a different wavelength than the first light beam. A beam combiner combines the first light beam toget...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ABATE, Vito, DEAVILLE, Todd
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHYSICS SOLDERING OR UNSOLDERING TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A dynamic lens for projecting different output beam shapes includes a first light source of laser diodes generating a first light beam toward a target. A projector generates a second light beam with a different wavelength than the first light beam. A beam combiner combines the first light beam together with the second light beam and directs the combined beams to a focusing plane that includes a lensing array to focus the first light beam into the output beam shape on the target. The lensing array includes a plurality of photoactive cells including at least one photoreactive group which changes molecular shape in response to light energy from the second light beam, thereby changing the orientation of adjacent liquid crystal molecules, which in turn alters the index of refraction of the photoactive cell. A method of operating the dynamic lens to generate the output beam shape is also disclosed. L'invention concerne une lentille dynamique pour projeter différentes formes de faisceau de sortie, qui comprend une première source de lumière de diodes laser générant un premier faisceau lumineux vers une cible. Un projecteur génère un second faisceau lumineux ayant une longueur d'onde différente du premier faisceau lumineux. Un multiplexeur de faisceaux combine le premier faisceau lumineux avec le second faisceau lumineux et dirige les faisceaux combinés vers un plan de focalisation qui comprend un réseau lenticulaire pour focaliser le premier faisceau lumineux dans la forme de faisceau de sortie sur la cible. Le réseau lenticulaire comprend une pluralité de cellules photo-actives comprenant au moins un groupe photoréactif qui change de forme moléculaire en réponse à une énergie lumineuse provenant du second faisceau lumineux, en modifiant ainsi l'orientation de molécules de cristaux liquides adjacentes, qui, à son tour, modifie l'indice de réfraction de la cellule photo-active. L'invention concerne également un procédé pour faire fonctionner la lentille dynamique pour générer la forme de faisceau de sortie.