Rodenstock Gmbh

Optische Werke G. Rodenstock

Herbert Zinner

Manfred Melzig

Udo Weigand

Yven Rohlfing

Herbert Schuster

Andrea Welk

Werner Mueller

Qiang Zheng

Donald Scott Nelson

Stephan Trumm

Werner Müller

Erhard Effer

Michael Voegt

Karl Huber

Hans-Peter Sommer

Erich Koell

Reiner Beck

Ferdinand Schreder

Charles William Carper, Jr

Erich KÖLL

A spectacle lens for a spectacle frame having a first spectacle lens area and a second spectacle lens area. The first spectacle lens area is more strongly colored than the second spectacle lens area. The spectacle lens is phototropic at least in the second spectacle lens area.

Eyeglass lens, use of an eyeglass lens, and process for manufacturing an eyeglass lens

The present invention relates to new photochromic, fused naphthopyran systems having specific substituents R, which can be used to attain very rapid lightening speeds, without detriment to the depth of darkening after excitation, and also to the use thereof in plastics of all kinds.

Photochromic annelated naphthopyrane systems with special substituents, for attaining rapid lightening speeds

The present invention relates to photochromic polyfused naphthopyrans having very long-wave absorption of the closed form extending well into the visible wavelength range, and to the use thereof in all kinds of plastics, especially for ophthalmic purposes, preferably in driving glasses.

Photochromic multiple ring-fused naphthopyrans having extreme longwave absorption extending far into the visible wavelength range

A method for producing a spectacle lens having in particular a diffractive microstructure on at least one lens surface. To this end, a thin structural support layer is initially made available, which on a surface has a microstructure. A lens main body is then cast to the microstructure of the structural support layer.

Producing microstructured spectacle lenses by means of transfer layer

The present invention relates to UV-curing-compatible photochromic single- or double-fused naphthopyrans of the general formulae (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by their excellent UV-curing compatibility, i.e. they remain undamaged&#x2014;incorporated, for example, in an acrylate monomer matrix with UV initiator&#x2014;by a free-radical polymerization of the matrix initiated by strong UV light. The photochromic dyes according to the invention, by means of suitable choice of substituents, are in addition characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having one discrete absorption band, can be replaced with a molecule of this type.

UV-curing-compatible photochromic fused naphthopyrans

The present invention relates to photochromic fluorenopyrans with defined dibenzo[b,d]pyrano fusion in accordance with general formulae (I) or (II) and to their use in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds of the invention are distinguished by two pronounced absorption bands of the open form in the visible wavelength range, meaning that with dye molecules of this kind it is possible to replace two conventional photochromic dyes each having only one discrete absorption band. The compounds of the invention, moreover, have a very good lifetime with very high performance.

Photochromic fluorenopyrans with defined dibenzo[B,D]pyrano fused attachment

The present invention relates to photochromic double-fused naphthopyrans of the general formula (I) or (II) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.

Photochromic double-fused naphthopyrans

The present invention relates to photochromic double-indeno-fused naphthopyrans of the general formula (I) and the use thereof in plastics of all kinds, particularly for ophthalmic purposes. The photochromic compounds according to the invention are characterized by two distinct absorption bands of the open form in the visible wavelength range, i.e. two conventional photochromic dyes, each having only one discrete absorption band, can be replaced with dye molecules of this type. The compounds according to the invention, moreover, have a very good lifetime with a very high performance.

Photochromic bis-idenofused naphthopryans

A photochromic compound suitable for use as a single substance for photochromic tinting of a transparent plastic article so that the tinted article has a neutral gray or brown color in the excited state, is made by fusing at least two non-identical photochromic sections to an aromatic structure. The photochromic sections are selected so that the different absorption wavelengths of the excited photochromic sections give rise to a neutral gray or brown color in the plastic material and are selected from the group consisting of oxazines and pyrans. At least one of the photochromic sections is not an indolino spiropyran. The aromatic structure to which the photochromic sections are fused is selected from the group consisting of benzene, biphenyl, naphthalene, anthracene and phenanthrene. The positions of fusion of the photochromic sections on the aromatic structure are directly adjacent to the oxygen atom of the pyran or the oxygen or nitrogen atom of the oxazine.

Photochromic compounds

A high refractive index, curable, synthetic resin composition comprising a core resin composition composed of a mixture of ethylenically unsaturated compounds, and an initiation system containing both photo and thermal initiators, particularly a photochromic resin composition which further includes at least one photochromic dye. Also a curing process, which includes a combination of multi-step radiation curing and thermal annealing. Articles produced of cured composition exhibit superior physical and, in appropriate cases, photochromic properties and can be easily mass produced on a commercial scale due to short processing time and use of readily available chemicals.

High index curable photochromic composition and its process

Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their special structure, have a reduced tendency of the molecules to migrate in plastics.

Diaryl-2H-naphthopyrans

Process for the production of a photochromic object

Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their spacial structures, have a reduced tendency of the molecules to migrate in plastics.

Growing community of inventors

Rohrbach, Germany

Herbert Zinner