Abstract:
A process for making a mould piece having a main curved surface bearing an utilitary microstructure which comprises transferring a utilitary microstructure from a master piece main surface to a main surface of a flat cured elastomeric film; pressing the cured elastomeric film and a master article against each other so as to conform the overall shape of said cured elastomeric film to the curved shape of the main surface of the master article and to spread over a curable coating composition between the curved main surface of the master article and the main surface bearing the replica of the said utilitary microstructure of the cured elastomeric film; curing the coating composition; removing the cured elastomeric film and depositing a layer of a metal or a metallic alloy on the exposed main surface of the hard coating of the master article; and recovering said metal or metallic alloy layer to obtain a mould piece having a curved main surface bearing a replica of said transferred utilitary microstructure.
Abstract:
A stamp for patterning onto a receiving surface (103) of an object (101) according to a defined pattern (P) comprises a stamping surface (21) of a resilient diaphragm (20). The stamping surface (21) is planar at rest. The pattern (P) is reproduced on the stamping surface (21) and the diaphragm (20) is affixed to a rigid body (13) along a peripheral edge, so that a middle part of the diaphragm (20) can move along a direction perpendicular to the stamping surface (21). The diaphragm (20) is more flexible near the peripheral edge than in the middle part. Then, the pattern (P) printed on a pseudo-spherical receiving surface (103) using the stamp exhibits few distortion.
Abstract:
A stamp for patterning onto a receiving surface (103) of an object (101) according to a defined pattern (P) comprises a stamping surface (21) of a resilient diaphragm (20). The stamping surface (21) is planar at rest. The pattern (P) is reproduced on the stamping surface (21) and the diaphragm (20) is affixed to a rigid body (13) along a peripheral edge, so that a middle part of the diaphragm (20) can move along a direction perpendicular to the stamping surface (21). The diaphragm (20) is more flexible near the peripheral edge than in the middle part. Then, the pattern (P) printed on a pseudo-spherical receiving surface (103) using the stamp exhibits few distortion.
Abstract:
The invention relates to a method for manufacturing an optical article with anti-glare properties, including: a) the formation on at least one main surface of a medium, by the application of a base of at least one colloidal mineral oxide with a refractive index no lower than 1.80 having initial porosity; b) optionally, the formation on the first bottom layer, by the application of a base of at least one colloidal mineral oxide with a refractive index lower than 1.65, of a second bottom layer with initial porosity at least equal to the initial porosity of said first layer; c) application to the bottom layer or layers of a top layer composition of an optically transparent polymer material with a refractive index no greater than 1.50; d) filling in the porosity of the bottom layer or layers by penetration in the bottom layer or layers of at least part of the material of the top layer composition formed in step (c) and forming a hardened top layer with a thickness determined such that the top layer and the bottom layer or layers, after filling in the initial porosity thereof, constitute a bilayer anti-glare coating, in the domain from 400 to 700 nm, preferably from 450 to 650 nm.
Abstract:
La invención se relaciona con un método para fabricar un artículo óptico con propiedades contra reflejos, que incluye a) la formación sobre cuando meno una superficie principal de un medio, mediante la aplicación de una bse de cuando menos un óxido mineral coloidal con un índice refrativo no inferior a 180 que tiene porosidad inicial; b) opcionalmente, la formación sobre la primera capa inferior, mediante la aplicación de una base de cuando menos un óxido mineral ooloidal con un índice refractivo inferior a 1.65, de una segunda capa inferior con porosidad inicial cuando menos igual a la porosidad inicial de la primera capa; c) aplicación a la capa o capas inferiores de una composición de capa superior de un material e polímero ópticamente transparente con un índice refractivo no mayor de 1.50; d) llenar en la porosidad de la capa o capas inferiores mediante penetración en la capa o capas inferiores de cuando menos parte del material de la composición de capa superior formada en el paso (c) y formar una capa superior endurecida con un espesor determinado de modo que la capa superior y la capa o capas inferiores, después del llenado de la porosidad inicial de las mismas constituyan un revestimiento contra reflejos de dos capas, en el dominio de 400a 700 nm, de preferencia de 450 a650 nm.
Abstract:
Procédé de fabrication d'un article d'optique à propriétés antireflets, comprenant : a) la formation sur au moins une surface principale d'un support, par application d'un sol d'au moins un oxyde minéral colloïdal d'indice de réfraction supérieur ou égal à 1,80 ayant une porosité initiale; b) optionnellement, la formation sur la première couche inférieure par application d'un sol d'au moins un oxyde minéral colloïdal d'indice de réfraction inférieur à 1,65 d'une seconde couche inférieure de porosité initiale au moins égale à la porosité initiale de ladite première couche; c) l'application sur la ou les couches inférieures d'une composition de couche supérieure d'un matériau polymérique optiquement transparent dont l'indice de réfraction, est inférieur ou égal à 1,50; d) le comblement de la porosité de la ou des couches inférieures par pénétration dans la ou les couches inférieures d'au moins une partie du matériau de la composition de couche supérieure formée à l'étape (c) et la formation d'une couche supérieure durcie dont l'épaisseur est déterminée de sorte que la couche supérieure et la ou les couches inférieures, après comblement de la ou leur porosité initiale, constituent un antireflet bicouche, dans le domaine allant de 400 à 700 nm, de préférence de 450 à 650 nm.
Abstract:
Procédé de fabrication d'un article d'optique à propriétés antireflets, comprenant : a) la formation sur au moins une surface principale d'un support, par application d'un sol d'au moins un oxyde minéral colloïdal d'indice de réfraction supérieur ou égal à 1,80 ayant une porosité initiale; b) optionnellement, la formation sur la première couche inférieure par application d'un sol d'au moins un oxyde minéral colloïdal d'indice de réfraction inférieur à 1,65 d'une seconde couche inférieure de porosité initiale au moins égale à la porosité initiale de ladite première couche; c) l'application sur la ou les couches inférieures d'une composition de couche supérieure d'un matériau polymérique optiquement transparent dont l'indice de réfraction, est inférieur ou égal à 1,50 ; d) le comblement de la porosité de la ou des couches inférieures par pénétration dans la ou les couches inférieures d'au moins une partie du matériau de la composition de couche supérieure formée à l'étape (c) et la formation d'une couche supérieure durcie dont l'épaisseur est déterminée de sorte que la couche supérieure et la ou les couches inférieures, après comblement de la ou leur porosité initiale, constituent un antireflet bicouche, dans le domaine allant de 400 à 700 nm, de préférence de 450 à 650 nm.
Abstract:
The application of a mark on the surface of an ophthalmic glass of the type with an external hydrophobic and/or oleophobic coating with a low surface energy on a substrate or a coating with a high surface energy comprises: (a) positioning a mask, with a configuration complementary to the desired mark, between the surface to be marked and an energizing discharge source able to eliminate the external coating to reveal the underlying substrate or high energy coating; and (b) depositing on the outer coating, a temporary protective coating having a surface energy higher than that of the external coating and a thickness of less than 5 nm in order to allow the discharge to act on the external coating across the temporary protective coating.
Abstract:
A process for making a mould piece 13 having a main curved surface 14 bearing an utilitary microstructure 2 and which comprises transferring a utilitary microstructure 2 from a master piece 1 main surface to a main surface 6 of a flat cured elastomeric film 5; pressing the cured elastomeric film 5 and a master article 8 against each other so as to conform the overall shape of said cured elastomeric film 5 to the curved shape of the main surface 9 of the master article 8 and to spread over a curable coating composition 10 between the curved main surface, 9 of the master article 8 and the main surface 6 bearing the replica of the said utilitary microstructure 2 of the cured elastomeric film 5 to transfer the microstructure 2 to an exposed surface 11 of the coated composition 10; curing the coating composition 10; removing the cured elastomeric film 5 and depositing a layer of a metal or a metallic alloy on the exposed main surface 11 of the hard coating 10 of the master article 8; and recovering said metal or metallic alloy layer to obtain a mould piece 13 having a curved main surface 14 bearing a replica of said transferred utilitary microstructure 2.
Abstract:
The invention concerns a method which consists in a process known per se in producing, on the curved substrate ( 10 ) to be treated, a film of material derived from a specific material source ( 13 ). The invention is characterized in that it consists in inserting, between the curved substrate ( 10 ) and the material source ( 13 ), a mask ( 19 ) relative to the curved substrate ( 10 ), preferably selecting as mask ( 19 ), a mask comprising a ring-shaped part ( 20 ). The invention is particularly useful for providing lenses with antiglare treatment.