Patents by Inventor Pierre Chavel
Pierre Chavel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10095027Abstract: A method of designing an imaging system including an optical system having a longitudinal optical axis, an image sensor and a spatial filter, the imaging system being configured to form an image of a focusing plane on the image sensor. The optical transfer function of the optical system combined with the spatial filter is calculated as a function of the image spatial frequencies, and of the focusing defect (?), so as to determine a contrast map and a phase map of the optical system combined with the pupil function of the spatial filter, the contrast map and the phase map being a function, of the spatial frequency (f), and of the focusing defect (?), and it is determined, based on these maps, a value of longitudinal extension (|P|) of the imaging system focusing depth domain in the useful range of spatial frequencies ([?fc; fc]) and an average contrast C.Type: GrantFiled: June 27, 2016Date of Patent: October 9, 2018Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Pierre-Antoine Frugier, Patrick Mercier, Pierre Chavel, Francois Goudail
-
Patent number: 9746693Abstract: A system includes a simultaneously bifocal diffractive lens component having a first focal point, a second focal point and a plurality of diffractive zones including a central zone and a plurality of annular concentric zones surrounding the central zone, the lens component having a first optical power and a second optical power associated with the first and second focal points respectively, the first and second focal points respectively corresponding to points of convergence of the most luminous orders of diffraction generated by the lens component for a nominal wavelength, the first system focal point and the second system focal point having a position dependent upon the value of the first optical power and the second optical power of the lens respectively, the central zone having a surface area value determined as a function of the pupil of the optical system, of the first optical power and the second optical power.Type: GrantFiled: October 23, 2013Date of Patent: August 29, 2017Assignees: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS)Inventors: Marius Peloux, Pierre Chavel
-
Publication number: 20160377861Abstract: A method of designing an imaging system including an optical system having a longitudinal optical axis, an image sensor and a spatial filter, the imaging system being configured to form an image of a focusing plane on the image sensor. The optical transfer function of the optical system combined with the spatial filter is calculated as a function of the image spatial frequencies, and of the focusing defect (?), so as to determine a contrast map and a phase map of the optical system combined with the pupil function of the spatial filter, the contrast map and the phase map being a function, of the spatial frequency (f), and of the focusing defect (?), and it is determined, based on these maps, a value of longitudinal extension (|P|) of the imaging system focusing depth domain in the useful range of spatial frequencies ([?fc; fc]) and an average contrast C.Type: ApplicationFiled: June 27, 2016Publication date: December 29, 2016Inventors: Pierre-Antoine FRUGIER, Patrick MERCIER, Pierre CHAVEL, Francois GOUDAIL
-
Patent number: 9421719Abstract: The invention relates to a transparent optical component having a cellular structure, comprising a network of walls (106), that forms a set of cells (104) that are juxtaposed parallel to a component surface. In order to produce such a component, an irregular set of points (101, 105) in the surface of the component is determined, each point being used to form a center of one of the cells. A position and an orientation of each wall are then determined such that the set of cells forms a Voronoï partition of the surface of the component. The component has a level of transparency that is compatible with an optical or ophthalmological use.Type: GrantFiled: May 16, 2011Date of Patent: August 23, 2016Assignees: Essilor International (Compagnie Generale D'Optique), Centre National de la Recherche ScientifiqueInventors: Jérôme Ballet, Céline Benoit, Christian Bovet, Jean-Paul Cano, Pierre Chavel, François Goudail
-
Publication number: 20150286071Abstract: A system includes a simultaneously bifocal diffractive lens component having a first focal point, a second focal point and a plurality of diffractive zones including a central zone and a plurality of annular concentric zones surrounding the central zone, the lens component having a first optical power and a second optical power associated with the first and second focal points respectively, the first and second focal points respectively corresponding to points of convergence of the most luminous orders of diffraction generated by the lens component for a nominal wavelength, the first system focal point and the second system focal point having a position dependent upon the value of the first optical power and the second optical power of the lens respectively, the central zone having a surface area value determined as a function of the pupil of the optical system, of the first optical power and the second optical power.Type: ApplicationFiled: October 23, 2013Publication date: October 8, 2015Inventors: Marius Peloux, Pierre Chavel
-
Patent number: 9046633Abstract: A transparent optical element (100), includes a plurality of stacked layers (1, 2), each of which consist of cells in which optical phase-shift values are provided. The layers are arranged such that boundaries between certain contiguous cells of one of the layers cut into cells of another layer. In this way, a useful apparent cell size can be reduced so as to reproduce a target optical phase-shift distribution with greater precision. Additionally, the maximum amplitude of optical phase shift variations that are produced by the element increases with the number of stacked layers. The chromatism of the diopter function of the element can also be reduced.Type: GrantFiled: March 8, 2012Date of Patent: June 2, 2015Assignees: ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE—CNRSInventors: Marius Peloux, Pierre Chavel
-
Publication number: 20140002911Abstract: A transparent optical element (100), includes a plurality of stacked layers (1, 2), each of which consist of cells in which optical phase-shift values are provided. The layers are arranged such that boundaries between certain contiguous cells of one of the layers cut into cells of another layer. In this way, a useful apparent cell size can be reduced so as to reproduce a target optical phase-shift distribution with greater precision. Additionally, the maximum amplitude of optical phase shift variations that are produced by the element increases with the number of stacked layers. The chromatism of the diopter function of the element can also be reduced.Type: ApplicationFiled: March 8, 2012Publication date: January 2, 2014Inventors: Marius Peloux, Pierre Chavel
-
Publication number: 20130069258Abstract: The invention relates to a transparent optical component having a cellular structure, comprising a network of walls (106), that forms a set of cells (104) that are juxtaposed parallel to a component surface. In order to produce such a component, an irregular set of points (101, 105) in the surface of the component is determined, each point being used to form a centre of one of the cells. A position and an orientation of each wall are then determined such that the set of cells forms a Voronoï partition of the surface of the component. The component has a level of transparency that is compatible with an optical or ophthalmological use.Type: ApplicationFiled: May 16, 2011Publication date: March 21, 2013Applicants: Essilor International (Compagnie Generale D'Optique), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Jérôme Ballet, Céline Benoit, Christian Bovet, Jean-Paul Cano, Pierre Chavel, François Goudail
-
Patent number: 8331007Abstract: A transparent optical component comprises two sets of cells (1) disposed in respective superposed layers (10, 20). Each cell (1) contains an optically active material, and the cells in each set are isolated from one another by separating portions (2) within the corresponding layer. The cells (1) of one layer are offset relative to the cells of the other layer so as to be located in line with the separating portions (2) pertaining to the other layer. Such optical component exhibits transparency that is improved compared with components having a single layer of cells or cells that are superposed.Type: GrantFiled: December 20, 2007Date of Patent: December 11, 2012Assignees: Essilor International (compagnie Generale d'optique), Centre National de la Recherche Scientifique-CNRSInventors: Pierre Chavel, Jerome Ballet, Christian Bovet, Jean-Paul Cano, Paul Lefillastre
-
Publication number: 20110043925Abstract: A transparent optical component comprises two sets of cells (1) disposed in respective superposed layers (10, 20). Each cell (1) contains an optically active material, and the cells in each set are isolated from one another by separating portions (2) within the corresponding layer. The cells (1) of one layer are offset relative to the cells of the other layer so as to be located in line with the separating portions (2) pertaining to the other layer. Such optical component exhibits transparency that is improved compared with components having a single layer of cells or cells that are superposed.Type: ApplicationFiled: December 20, 2007Publication date: February 24, 2011Inventors: Pierre Chavel, Jerome Ballet, Christian Bovet, Jean-Paul Cano, Paul Lefillastre
-
Patent number: 5258024Abstract: The present invention relates to a method of manufacture of an optical lens providing refractive index modulation, characterized in that, starting from a lens of transparent hydrophilic polymer preferably of the hydrogel type, which has previously been shaped, the lens is impregnated with a photopolymerizable composition containing at least one monomer and a photoinitiator, which are in solution in water in the case of a hydrogel, the impregnated lens is subjected to locally modulated irradiation so as to cause local selective polymerization of the monomer, whereupon the excess non-hardened photoinitiator and non-pulverizable monomer is removed.Type: GrantFiled: February 14, 1991Date of Patent: November 2, 1993Assignee: Essilor International (Compaigne Generale d'Optique)Inventors: Pierre Chavel, Denis Joyeux, Daniel Lougnot, Dominique Baude, Jean-Claude Meslard, Jean Taboury
-
Patent number: 5172143Abstract: The manufacture of an artificial optical lens having any given power profile starts from an artificial optical lens having a different power profile. A physical-chemical treatment method modifies the power profile to obtain a required power profile. A rotating mask is used for spatial modulation of the energy flux.Type: GrantFiled: January 15, 1991Date of Patent: December 15, 1992Assignee: Essilor International Cie Generale d'OptiqueInventors: Dominique Baude, Jean-Claude Meslard, Gerard Obrecht, Pierre Chavel, Denis Joyeux, Jean Taboury
-
Patent number: 5114220Abstract: Disclosed is an ophthalmic lens which characteristically comprises at least two concentric regions having diffractive components with different phase profiles in order to use different orders of diffraction. The diffractive components may be formed by holograms in relief or index holograms.Type: GrantFiled: May 15, 1989Date of Patent: May 19, 1992Assignee: Essilor International, Compagnie Generale d'OptiqueInventors: Dominique Baude, Pierre Chavel, Denis Joyeux, Jean Taboury
-
Patent number: 5104212Abstract: A diffractive contact lens in relief includes a smoothing layer (50) of optically transparent material having a smooth outside surface (51) and placed over the optical surface (16) in relief so as to immerse the relief.Type: GrantFiled: November 3, 1989Date of Patent: April 14, 1992Assignee: Essilor International-Compagnie Generale d'OptiqueInventors: Jean Taboury, Pierre Chavel, Denis Joyeux, Dominique Baude
-
Patent number: 5081540Abstract: A holographic apparatus of the type comprising a conoscopic system including a birefringent crystal inserted between two polarizers, wherein the apparatus also includes an aperture angle limiter inserted on the path of the light rays and wherein one of the birefringent crystal and the aperture angle limiter is disposed off the optical axis of the apparatus.Type: GrantFiled: April 20, 1990Date of Patent: January 14, 1992Assignee: Etat Francais, represente par le Ministre des Postes, Telecommunications et de l'Espace (Centre National d'Etudes des Telecommunications)Inventors: Eric Dufresne, Pierre Chavel, Gabriel Sirat
-
Patent number: 5016977Abstract: The present invention relates to an optical lens for correcting astigmatism. It includes diffractive components whose outlines are delimited by conic section curves having non-degenerate centers. More precisely, in accordance with the invention, the lens includes adjacent diffractive components having hyperbolic or elliptical outlines with a periodicity in r.sup.2 in two mutually orthogonal directions x and y intersecting on the axis of the lens and coinciding with the main axes of the hyperbolas or of the ellipses, which are determined respectively by the equations: .DELTA.r.sub.x.sup.2 =2.lambda..vertline.f.sub.x .vertline.; and .DELTA.r.sub.y.sup.2 =2.lambda..vertline.f.sub.y .vertline.; in which: .DELTA.r.sub.x.sup.2 represents the periodicity in r.sup.2 along the x direction; .DELTA.r.sub.y.sup.2 represents the periodicity in r.sup.2 along the y direction; .lambda. represents the mean utilization wavelength; f.sub.x represents the desired focal length in the X direction; and f.sub.Type: GrantFiled: February 5, 1990Date of Patent: May 21, 1991Assignee: Essilor International-Compagnie GeneraleInventors: Dominique Baude, Pierre Chavel, Denis Joyeux, Jean Taboury