Abstract:
The invention concerns an article comprising a substrate having a main surface covered with a coating part of which at least is mesoporous and has a refractive index profile with optical function, the variation of which is imposed by the mesopore content and/or the filling factor of the mesopores. The profile may be such that the refractive index varies depending on the distance to a given axis, or such that the refractive index variation is monotone decreasing along any axis perpendicular to the surface of the substrate underlying the mesoporous part of said coating and oriented away from the substrate. The invention also concerns methods for making said articles, which differ depending on the technique from which the refractive index profile is created. The invention is applicable to ophthalmological optics.
Abstract:
A composition having a polysulfide polysilane formed by the reaction of a polythiol and an alkenyl silane. The reactants are combined in a thiol-ene addition process driven by UV radiation or heat, preferably by UV radiation. The polysulfide polysilane is then hydrolyzed and may be combined with other hydrolyzed compounds. For coatings, the polysulfide polysilane is hydrolyzed and may optionally be combined with nanoparticles. For bulk materials, the polysulfide polysilane is hydrolyzed, concentrated and heated to form a high refractive index material which can be used to form lenses.
Abstract:
The invention relates to an optical article, for example, an ophthalmic lens, comprising at least one multilayer anti-reflective coating on a transparent substrate made from organic or mineral glass. Said coating comprises successively and starting at the substrate, a layer of material with high refractive index (HI), made from a hybrid organic/inorganic matrix within which are dispersed particles of mineral oxide or chalcogenide with a diameter of 2 to 50 nm and a layer of material with low refractive index (BI), obtained by hardening of a composition comprising at least one silane precursor (I) with 4 hydrolysable groups and at least one fluorosilane precursor (II), said second composition comprising at least 10 % in mass of fluorine in a theoretical dry extract and with a molar ratio I/I+II greater than 80 %.
Abstract translation:本发明涉及光学制品,例如眼科镜片,其包括在由有机或无机玻璃制成的透明基底上的至少一个多层抗反射涂层。 所述涂层连续地并且在基底处开始具有高折射率(HI)的材料层,其由混合的有机/无机基质制成,其中分散有直径为2-50nm的矿物氧化物或硫族化物颗粒和 通过使包含至少一种具有4个可水解基团的硅烷前体(I)和至少一种氟代硅烷前体(II)的组合物硬化而获得的具有低折射率(BI)的材料层,所述第二组合物包含至少10质量% 的氟在理论干提取物中并且具有大于80%的I / I + II的摩尔比。
Abstract:
Composición polimérica para elaborar una lente oftálmica transparente caracterizada por que se obtiene por polimerización de una composición polimerizable que comprende al menos: - un monómero u oligómero (A) que comprende al menos un grupo reactivo seleccionado entre epoxi, tioepoxi, epoxisilano, (met)acrilato, tio(met)acrilato, vinilo, uretano, tiouretano, isocianato, mercapto y alcohol, donde dicho monómero (A) se contrae durante la polimerización; - un monómero (B) que comprende al menos un grupo cíclico no aromático donde durante la polimerización dicho grupo cíclico se abre y reacciona con otra molécula de monómero (B) y/o con un grupo reactivo del monómero u oligómero (A), - donde dicho monómero (B) se expande durante la polimerización y donde dicho monómero (B) se selecciona entre tetraspiroortocarbonato y sulfatos cíclicos.
Abstract:
"artigo e processo de fabricação de um artigo". a presente invenção refere-se a um artigo de óptica, por exemplo uma lente oftálmica, compreendendo pelo menos um empilhamento anti-reflexos de múltiplas camadas sobre um substrato transparente de vidro orgânico ou mineral, o referido empilhamento compreendendo, sucessivamente e na ordem a partir do substrato, pelo menos uma camada de material de índice de refração elevado (hi) compreendendo uma matriz híbrida orgânica - inorgânica na qual são dispersas as partículas de óxido metálico e/ou calcogeneto de um diâmetro de 2 a 50 nm, e uma camada de material de índice de refração baixo (bi) obtida por endurecimento de uma composição compreendendo pelo menos um silano precursor (i) tendo 4 partes hidrolisáveis e pelo menos um fluorossilano precursor (ii), esta segunda composição compreendendo pelo menos 10% em massa de flúor em seu extrato seco teórico e uma relação molar i/i + ii superior a 80%.
Abstract:
The invention relates to a method of producing a substrate which is coated with a mesoporous layer and to the use thereof in ophthalmic optics. The inventive method comprises the following steps comprising: preparing a precursor sol containing (i) a precursor agent that is selected from compounds having formula M(X)4 (I), in which X is a hydrolysable group and M represents silicon or a tetravalent metal and mixtures thereof, (ii) at least one organic solvent, (iii) at least one pore-forming agent and (iv) water; depositing a film of the precursor sol on a main surface of the substrate; optionally consolidating the mesoporous structure of the deposited film; eliminating the pore-forming agent; and recovering the substrate coated with the mesoporous layer. The method is characterized in that: (i) the pore-forming agent is eliminated at a temperature of less than or equal to 150° C.; and (ii) the method comprises a step involving the introduction of at least one reactive agent bearing at least one hydrophobic group, before the deposition step and/or after said step.
Abstract:
The present invention relates to an article comprising a substrate having a main surface coated with a coating, part of which at least is mesoporous and has a refractive index profile with optical function, whose variation is imposed by the mesopore content and/or the filling ratio of the mesopores. The profile may be such that the refractive index varies depending on the distance to a given axis, or such that the refractive index variation is monotone, decreasing along any axis which is perpendicular to the surface of the substrate underlying the mesoporous part of said coating and oriented away from the substrate. The present invention also relates to methods for making said article, which differ depending on the technique from which the refractive index profile is created. The invention is applicable to ophthalmic optics.
Abstract:
La présente invention concerne un procédé de fabrication d'un support revêtu d'un film photochrome mésoporeux, comprenant :a) la préparation d'un sol précurseur d'un film mésoporeux comprenant un agent précurseur inorganique, au moins un solvant organique, de l'eau, au moins un agent porogène et un agent précurseur hydrophobe porteur d'au moins un groupe hydrophobe ;b) le dépôt d'un film du sol précurseur sur une surface principale d'un support ;c) l'élimination de l'agent porogène du film résultant de l'étape précédente à une température
Abstract:
The light-polarizing solid coating composition which comprises (i) particles of at least one magnetic material suspended in a solvent, is characterized in that it comprises (ii) at least one dichroic dye compound. Application to ophthalmic optics.