Essilor International (Compagnie Generale D'optique)

Centre National De La Recherche Scientifique

Essilor International

Essilor International Cie Generale D'optique

Centre National De La Recherche Scientifique-Cnrs

Christian Bovet

Jean-Paul Cano

Samuel Archambeau

Jerome Ballet

Anthony Saugey

Pierre Chavel

Jérôme Ballet

Paul Lefillastre

Gilles Mathieu

Claudine Biver

Sandrine Duluard

Yves Leclaire

Stephane Perrot

Romain Fayolle

Fabien Berit-Debat

Céline Benoit

Sylvie Vinsonneau

Stéphane Perrot

Antoine Marty

Amélie Kudla

François Goudail

Jerôme Ballet

Jean Paul Cano

Antony Saugey

An ophthalmic lens including an active matrix including pixels, addressing rows serving to control the pixels, data columns serving to supply electrical power to pixels, and at least one transistor for each pixel. In the matrix of the ophthalmic lens: each row or column undulates continuously but non-periodically on either side of a theoretical straight addressing or data line connecting the two end terminals of the row or column.

Ophthalmic lens integrating a disordered array, transparent active matrix

The invention relates to an optical article comprising a substrate coated with an abrasion and scratch resistant coating composed of a lower layer and an upper layer that do adhere to each other, the upper layer and the lower layer being layers of cured upper and lower layer compositions, said upper layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula RYSi(X)and at least one compound, or a hydrolyzate thereof, of formula M(Z), the following ratio being lower than 2.3: said lower layer composition comprising at least one organosilane, or a hydrolyzate thereof, of formula R'Y&#x2032;Si(X&#x2032;)and, optionally, at least one compound, or a hydrolyzate thereof, of formula M&#x2032;(Z&#x2032;), the following ratio being higher than 2.3: In the hereabove formulas, M and M&#x2032; are metals or metalloids of valences x and y, at least equal to 4, R and R&#x2032; groups are monovalent organic groups that are bound to silicon through a carbon atom and that contain at least one epoxy function, X, X&#x2032;, Z and Z&#x2032; groups are hydrolyzable groups, Y and Y&#x2032; are monovalent organic groups that are bound to silicon through a carbon atom, n, m, n&#x2032; and m&#x2032; being integers such that n and n&#x2032;=1 or 2 with n+m and n&#x2032;+m&#x2032;=1 or 2.

Optical article comprising a double-layer abrasion and scratch resistant coating and method for production thereof

The invention relates to a transparent optical component having a cellular structure, comprising a network of walls (), that forms a set of cells () that are juxtaposed parallel to a component surface. In order to produce such a component, an irregular set of points () 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 Vorono&#xef; partition of the surface of the component. The component has a level of transparency that is compatible with an optical or ophthalmological use.

Production of a transparent optical component having a cellular structure

Method for producing a plastic film containing a compound absorbing ultraviolet radiation comprising (a) depositing an alcoholic solution of polyvinyl butyral on a transparent plastic support film, (b) evaporating the solvent from the alcoholic solution of polyvinyl butyral so as to form a polyvinyl butyral layer on the transparent support film, (c) printing the polyvinyl butyral layer with an ink absorbing ultraviolet radiation (UV absorber) in a pattern, (d) heating the transparent plastic support film, coated with the printed polyvinyl butyral layer so as to enable at least part of the UV absorber to pass from the polyvinyl butyral layer to the plastic support film, (e) removing the polyvinyl butyral layer, preferably by washing with a suitable solvent. The application also relates to the film obtained by this method and the use of this film for producing a photochromic element with a spatially non-uniform behavior.

Method for producing an anti-UV plastic film with non-uniform spatial distribution of the UV absorber and photochromic optical elements covered with such a plastic film

An electrically controllable optical component () comprises a transparent array of cells () and two transparent electrodes () which are parallel and lying opposite each other on either side of the array of cells. Certain of the cells located between the two electrodes contain different electroactive materials, so that said cells exhibit different respective variations in at least one optical quantity in response to an electrical signal applied to the electrodes. An optical function is thus temporarily conferred on the component, resulting from gradients in the optical quantity that are formed parallel to the surface of the component.

Electrically controllable optical component comprising an array of cells

The invention relates to transparent electrochromic systems which each include one pair of supply electrodes and at least one pair of polarization electrodes. The polarization electrodes prevent a reaction of mutual neutralization of the electroactive substances of the systems from causing unnecessary consumption of electric current. Said electrodes also prevent a neutralization reaction from limiting a lower value of light transmission of the systems. For this purpose, the polarization electrodes produce an electric field inside the systems, which attracts the electroactive substances that have already reacted with the supply electrodes to different areas.

Transparent electrochromic systems with a plurality of polarisation electrodes

The invention relates to a photochromic optical article with reduced thermal dependency, comprising: (a) a transparent substrate, (b) a saturated photochromic layer having, in the activated state and at a temperature of 20&#xb0; C. or greater, a relative transmission factor of less than 1% in the visible range, and (c) an anti-UV coating of plastic material at least partially covering the saturated photochromic layer, the said anti-UV coating containing at least one agent which absorbs UV radiation (anti-UV agent) and is distributed in a pattern consisting of a multitude of points, each having a surface area of less than 0.15 mm 2, the average distance between two neighboring points lying between 0.5 and 2 mm and the ratio of the overall surface area of all the points to the total surface area of the anti-UV coating being such that the relative transmission factor of the optical article in the visible range in the activated state and at 20&#xb0; C. or greater is at least equal to 5%. The invention also relates to two methods for manufacturing such an optical article.

Photochromic optical article comprising a saturated photochromic coating and a film absorbing UV radiation

The invention relates to a transparent component () comprising active members () that are juxtaposed in parallel to a surface of the component, and that are each switchable between a transparent state and a reflecting state. Each active member establishes a light path between a light passage opening and a side of the component when said active member is reflecting. An addressing system () further controls the switching of the active members so that a reduced number of active members is simultaneously reflecting. Therefore, an image formed by transparency through the component thus appears permanently and continuously. Such a transparent component can be used for making an image superimposition device and an image display and storage device.

Transparent component with switchable reflecting elements, and devices including such component

A method sticks onto a curved surface of a substrate a functional film () that has a substantially planar initial shape. To this end, the film () is retained on a deformable membrane () by connecting means () that allow portions of said film to slip relative to the membrane when said membrane is deformed. This reduces stresses that are created in the film by the deformation. The method is adapted for applying a functional film to an ophthalmic lens.

Method for sticking a film onto a curved substrate

A transparent optical component comprises two sets of cells () disposed in respective superposed layers (). Each cell () contains an optically active material, and the cells in each set are isolated from one another by separating portions () within the corresponding layer. The cells () of one layer are offset relative to the cells of the other layer so as to be located in line with the separating portions () 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.

Optically transparent component with two sets of cells

A transparent optical component () comprises at least one transparent set of cells () juxtaposed parallel to one surface of the component, each cell being separated by absorbing walls () parallel to the component surface, and each cell being hermetically sealed and containing at least one substance with an optical property. The optical component may be cut out along a predefined contour and optionally drilled. The invention also relates to a method of producing such an optical component and its use for the production of an optical element. The optical element may especially be a spectacle lens.

Transparent pixelized optical component with absorbing walls, its method of manufacture and its use in the manufacture of a transparent optical element

A transparent optical component having cells () filled with an optical material is proposed, which has a high transparency. The cells of the component are filled to levels (h, . . . , h) which vary randomly, and the variations of which are adapted so as not to cause a perceptible optical defect. To do this, the fill levels of the cells are adapted so that the phase shifts experienced by the light rays (R, . . . , R) which pass through the cells have a root mean square deviation of less than one quarter of the wavelength (). Such a component may in particular be an ophthalmic lens.

Transparent optical component having cells filled with optical material

An optical component () comprises a transparent set of cells () juxtaposed in parallel to a surface of the component. Each cell is hermetically sealed and contains a substance with an optical property. The set of cells comprises cells of several sizes. The size of the cells can be varied between various locations of the surface of the component (), for making it possible to cut out the component without altering its optical properties. Furthermore, the variation in size of the cells serves to prevent diffraction or scattering from being visible in certain zones of the component.

Optical component with cells

An optical component () comprises at least one transparent set of cells () juxtaposed parallel to a surface of the component, each cell having a size and a geometry that are different from those of its neighbors forming a network of cells with random distribution and random geometry, parallel to the surface of the component. Each cell is hermetically sealed and contains at least one substance with optical property. The invention also comprises a method of producing such an optical component and its use in the fabrication of an optical element. The optical element can in particular be a spectacle lens.

Randomly pixellated optical component, its fabrication method and its use in the fabrication of a transparent optical element

According to a process for manufacturing a series of ophthalmic lenses, each lens consists of a substrate and a film portion () attached to the substrate. The characteristics specific to each lens are obtained by functionalizing the film portion. Film functionalization is carried out when the film is in the form of a large planar sheet (), and then each portion is cut from the sheet. To obtain economic lens manufacture, with a good production yield, the film portions have, right from the start of the process, dimensions corresponding substantially to the housing of a frame into which each lens is intended to be fitted.

Growing community of inventors

Charenton le Pont, France

Christian Bovet