Abstract:
The invention relates to a polarisation splitter comprising a substrate which is provided with a pile of alternating layers of PrTiO3 and a material having a lower refractive index. The thickness of said layers e1 and e2 respectively satisfies the relations of the equations (I) and (II) wherein lambda represents the wavelength covered, n1 represents the refractive index of the first layer, and n2 represents the refractive index of the second layer. The invention also relates to a method for producing one such polarisation splitter. The inventive polarisation splitter can be used in an ophthalmic lens comprising inserts for projecting an image towards the user.
Abstract:
Optical article (I) comprises a transparent substrate made up of organic or mineral glass, comprising main phases, which comprises an anti-reflecting multi-layer coating comprising two layers (titanium oxide (under stoichiometric condition)) absorbing in the visible region such as the relative factor of transmission (Tv) of visible light reduced to 10 (preferably 80)% compared to (I) does not comprising the layers in the visible region. An independent claim is also included for the preparation of (I).
Abstract:
The invention concerns a method for making an antiglare stack by vacuum evaporation on an organic substrate (1) at a temperature lower than 150 DEG C, comprising steps which consist in depositing at least a layer of material having a refractive index different from that of MgF2 (4, 4'), preparing the surface of the thus coated substrate, and depositing an outer MgF2 layer (5) without ionic assistance. The resulting antiglare stack on organic substrate exhibits good adherence and good scratch resistance. The invention is applicable to ophthalmic lenses.
Abstract:
Artículo óptico que comprende un sustrato transparente de vidrio orgánico o mineral, que presenta unas caras principales delantera y posterior, comprendiendo por lo menos una de dichas caras principales un revestimiento antireflejos multicapas, comprendiendo dicho revestimiento anti-reflejos por lo menos dos capas que absorben en el visible y comprendiendo un óxido de titanio sub-estequiométrico, siendo las capas que absorben en el visible tales que el factor relativo de transmisión de la luz visible Tv está reducido por lo menos 10%, preferentemente por lo menos 40%, y mejor aún por lo menos 80%, con relación al mismo artículo que no comprende dichas capas que absorben en el visible, comprendiendo dicho revestimiento anti-reflejos un apilamiento de capas alternadas de alto índice de refracción (HI) y de bajo índice de refracción (BI) en el que una por lo menos de las capas que absorben en el visible es una capa de alto índice (HI) que comprende un óxido de titanio sub-estequiométrico, caracterizado porque por lo menos una de las capas de bajo índice (BI) comprende una mezcla de óxido de silicio y de óxido de aluminio.
Abstract:
Optical article (I) comprises a transparent substrate made up of organic or mineral glass, comprising main phases, which comprises an anti-reflecting multi-layer coating comprising two layers (titanium oxide (under stoichiometric condition)) absorbing in the visible region such as the relative factor of transmission (Tv) of visible light reduced to 10 (preferably 80)% compared to (I) does not comprising the layers in the visible region. An independent claim is also included for the preparation of (I).
Abstract:
Optical article (I) comprises a transparent substrate made up of organic or mineral glass, comprising main phases, which comprises an anti-reflecting multi-layer coating comprising two layers (titanium oxide (under stoichiometric condition)) absorbing in the visible region such as the relative factor of transmission (Tv) of visible light reduced to 10 (preferably 80)% compared to (I) does not comprising the layers in the visible region. An independent claim is also included for the preparation of (I).
Abstract:
The invention concerns a method for making an antiglare stack by vacuum evaporation on an organic substrate ( 1 ) at a temperature lower than 150° C., comprising steps which consist in depositing at least a layer of material having a refractive index different from that of MgF 2 ( 4, 4 '), preparing the surface of the thus coated substrate, and depositing an outer MgF 2 layer ( 5 ) without ionic assistance. The resulting antiglare stack on organic substrate exhibits good adherence and good scratch resistance. The invention is applicable to ophthalmic lenses.