Visible radiation absorbers for ophthalmic lenses materials

FIELD: chemistry.

SUBSTANCE: invention relates to azocompounds, corresponding to general formula, represented below, in which R1 represents C(O)C(CH3)=CH2;R2 represents H; R3 represents C1-C4alkyl or XOC(O)C(CH3)=CH2; X represents C1-C4alkyl. The invention also relates to material for ophthalmological device, which contains said azocompound, to ophthalmological device, made of said material, and intraocular lens, made of material that includes azocompound.

EFFECT: azocompounds, absorbing visible radiation, which are capable to copolymerisation with other compounds in materials for ophthalmological devices.

11 cl, 5 dwg, 5 tbl, 8 ex

 



 

Same patents:

FIELD: physics.

SUBSTANCE: this flat lens is made from blank is made from high-temperature plastic straining of plate produced from Al2O3 crystal Z-cut. Mirror axis of said plate is aligned with that of male die with working surface described by 4th degree polynomial y = ΣKakxk, where y, x are coordinates of cross-section with centre at mirror axis, ak are factors describing the focal length and lens depth at k = 1…4. Flat lens inlet and outlet surfaces are planes perpendicular to mirror axis of the blank and lens. Flat lens outlet surface and blank have common point at lens mirror axis. Outlet surface is defined by required depth of the flat lens.

EFFECT: lens for parallel light beam directed perpendicular to part inlet surface.

1 dwg

FIELD: medicine.

SUBSTANCE: invention refers to transparent silicone hydrogels. What is presented is silicone hydrogel prepared by polymerisation of mixture of monomers containing (a) 30-98 wt % of at least one silicone (meth)acrylamide monomer and (b) 1-50 wt % of at least one non-silicone (meth)acrylamide monomer containing two or more hydroxyl groups in its molecule; wherein weight percentage is calculated from a total amount of monomer and polymer components in the monomer mixture, and a total amount of monomers (a) and (b) makes 90 wt % or more in relation to the total amount of the monomer and polymer components in the monomer mixture. There are also presented a medical device, an ophthalmic lens and a contact lens made of the above silicone hydrogel.

EFFECT: presented silicone hydrogel has the high content of acrylamide monomer and the excellent balance of humidity, elasticity, wetting ability and transparency, and is applicable to produce lenses having the excellent characteristics.

19 cl, 4 tbl, 27 ex

FIELD: physics, optics.

SUBSTANCE: invention relates to a laser beam focusing head for laser cutting, a method and an apparatus for laser cutting of a metal component. The focusing head comprises a collimating lens (13) and a focusing lens (14). The collimating lens (13) and the focusing lens (14) are made of ZnS and have peripheral thickness of at least 5 mm. A deflecting mirror (15) operating at an inclination angle (α) from 40° to 50° is placed between the collimating lens (13) and the focusing lens (14) on the path of the laser beam. The laser cutting apparatus comprises a solid-state laser device (SL) emitting a laser beam with wavelength of 1.06 mcm to 1.10 mcm and power of 0.1 kW to 25 kW, said focusing head and a conveying fibre (CF) connecting the solid-state laser device (SL) and the focusing head.

EFFECT: invention provides a stable focusing position of a laser beam during cutting.

13 cl, 5 dwg, 1 tbl

FIELD: nanotechnology.

SUBSTANCE: invention relates to the field of optical nanotechnologies, optical instrument-making, rocket, space, laser optics, quantum and optical nanoelectronics, useful for display, television and medical technology. The optical coating is a thin layer (100 nm or less) coating based on carbon nanotubes with the magnitude of inhomogeneities on the nanometer level. For application of carbon nanotubes on the substrate a slot CO2-laser is used with the laser beam controlled in power. The optical element consists of the coating based on carbon nanotubes and a hygroscopic substrate. The substrates of KBr, NaCl, KCl are used for providing functioning of this optical coating up to the middle infrared region of the spectrum. The coating is able to function in the infrared regions of the spectrum.

EFFECT: increased moisture resistance of the coating.

3 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of forming a transparent doped layer containing zinc oxide on a polymer substrate for optoelectronic devices and a transparent doped layer. The method includes contacting a polymer substrate with at least one precursor containing a dopant and zinc, and exposing to ultraviolet light during chemical vapour deposition to decompose at least one precursor and deposit a layer on the polymer substrate. The polymer substrate is selected from a group consisting of fluoropolymer resins, polyesters, polyacrylates, polyamides, polyimides and polycarbonates. The contacting step is carried out at pressure approximately equal to atmospheric pressure.

EFFECT: providing a chemical vapour deposition method for depositing doped zinc oxide films on polymer substrates for use in optoelectronics.

12 cl, 1 tbl, 8 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: group of inventions relates to a polimerisation-able photochromic isocyanate composition, containing a photochromic compound, to a photochromic mesh optical material and to a method of its obtaining. The polimerisation-able photochromic isocyanate composition includes. wt.p.: an organic photochromic compound 1-15; a polymerisation catalyst 0.01-5, polymerisable compounds 100. The polymerisable compounds contain, wt.p.: diisocyanates and/or oligoisocyanurateisocyanates 60-100, monoisocyanates 0-40. The catalyst is used in an amount of 0.01-5 wt.p. per 100 wt.p. of the polymerisable compounds. Also described is the photochromic mesh optical material - the product, obtained by thermal hardening of the polymerisation-able composition, described above, at least, on one surface of a sheet of a transparent substrate, made of polymethylmethacrylate, polycarbonate, polyethyleneterephthalate, cellulose derivatives, polyvinyl alcohol, polyvinylchloride, polyvinylidenchloride, polyethers, polyurethanes. Also described is a method of obtaining the photochromic mesh optical material.

EFFECT: obtaining the polymerisation-able photochromic isocyanate composition with high adhesion ability and product based on it with high optical properties, such as transparency, colourlessness, or colouration, and long-term exploitation.

13 cl, 2 tbl, 25 ex

FIELD: physics, optics.

SUBSTANCE: invention can be used in optical systems of UV, visible and IR optical, optoelectronic and laser devices. A flat-concave lens is made of a plastically deformed piece part, wherein an integral flat surface is perpendicular to an axis of symmetry of the piece part and formed from an apex of the piece part at x0<H, wherein H is the thickness of the piece part. An output surface of the lens has a profile providing measuring the thickness hy=h0×n0/ny, wherein h0 is the lens thickness in the centre, n0 is an ordinary beam refraction index, while ny is an extraordinary beam refraction index at a distance Y from the lens centre. The piece part is made by the plastic deformation of a parallel-sided plate of a crystal Z-section by the central annular bend. The lens surface is formed by removing an excessive layer of the material from the piece part.

EFFECT: producing the leucosapphire lens forming the flat wavefront of extraordinary beams and transparent within 25,000-2,000 cm-1 for a parallel beam of light perpendicular to the input surface.

2 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to improved method of obtaining workpieces from silver halides and their solid solutions for fibrous infrared lightguides, which includes application on silver halide crystal-core of crystalline shell of crystalline silver halide with refraction index lower than in crystal-core, and thermal processing. Shell on crystal-core is applied by ion-exchange diffusion in ion-exchange source, as the latter taken is finely disperse silver halide powder with coarseness 1-20 mcm, diffusion is carried out at temperature, close to melting temperature of crystal-core in atmosphere of mixture of vapours of halides, included into composition of crystal material and powder, taken in equal ratio under pressure 0.2-0.5 atm.

EFFECT: method makes it possible to reduce optic loss of lightduides, operating in infrared spectrum range.

2 ex

FIELD: chemistry.

SUBSTANCE: multilayered coating contains three successive layers with an even thickness: a lower mirror metal radio-reflecting skin-layer of pure aluminium, an intermediate protective thermoregulatory dielectric layer of zirconium dioxide and an upper protective wear-resistant highly strong diamond-like carbon layer.

EFFECT: provision of the operation in extreme conditions of open space due to the application of a thin substrate-envelope from a polymer composite material.

3 cl, 1 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to a monocrystal with a garnet-type structure to be used in optical communication and laser processing devices. This monocrystal is described by general formula (Tb3-xScx)(Sc2-yAly)Al3O12-z, where 0<x<0.1; 0≤y≤0.2; 0≤z≤0/.3.

EFFECT: translucent monocrystal that can inhibit cracking at cutting.

5 cl, 3 dwg, 1 tbl, 5 ex

FIELD: physics, optics.

SUBSTANCE: invention relates to visible light absorbers, particularly novel azo compound monomers, particularly suitable for use in materials for implantable ophthalmic lens materials. The ophthalmic device material includes an azo compound, a device forming acrylic monomer and a cross-linking agent. The ophthalmic device is made from the ophthalmic device material and is in the form of intraocular lenses, contact lenses, keratoprostheses and corneal inlays or rings.

EFFECT: azo compounds are suitable for use as monomers which absorb part of the visible light spectrum (about 380-495 nm).

17 cl, 6 dwg, 3 tbl

FIELD: chemistry.

SUBSTANCE: the invention relates to polymer colouring agents used in coating compositions to protect the image forming layer of the offset plates. Described are a new water-soluble polymer colouring agent with the absorption band ranging from about 300 nm to about 600 nm, and a coating composition for a thermographic offset plate which comprises: (a) the said polymer colouring agent with the absorption band ranging from about 300 nm to about 600 nm, and (b) organic microparticles which contain cross-linked copolymers of acrylate ot methylacrylate and styrole, 2-hydroxymethylacrylate, methacrylate, poly(oxyethylene)methacrylate or a linear or branched alkylmethacrylate; or inorganic nanoparticles containing silicone oxide or aluminium oxide. Described is the thermographic offset plate for reverse printing, containing (a) water receptive plate, (b) a layer positioned on the plate which forms the image in the near-infrared region, and (c) the coating layer which is positioned on the image-forming layer and contains the said coating composition.

EFFECT: reduction or elimination of background filling of the offset plates in the conditions of white light, elimination of the need to use separating paper when packaging offset plates.

7 cl, 10 dwg, 13 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of marking materials with coded microparticles. Described is a method of marking materials with coded microparticles, characterised by that the coded microparticles used are obtained (i) through polymerisation of at least one water-soluble monoethylene unsaturated monomer in the presence of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, through reverse suspension polymerisation of water in oil, where the suspension agent used is doped nanoparticles, or (ii) emulsion polymerisation of water-insoluble monoethylene unsaturated monomers containing 0-10 wt %, in terms of the mixture of monomers, of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, where the emulsifying agent for stabilising the dispersion phase is in form of doped nanoparticles, or (iii) polymerisation of at least one ethylene unsaturated monomer and a copolymerisable dye containing an ethylene unsaturated double bond and, if needed, agglomeration of these particles, where during polymerisation in accordance with (i) and (ii), nanoparticles used are radioactively doped or doped with at least one dye and one compound from the group of rare-earth elements of the periodic table. Described also are materials containing coded microparticles for marking, obtained using the described method. The invention describes use of coded microparticles obtained using the described method.

EFFECT: novel method of marking materials.

14 cl, 1 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: present invention pertains to new photochromic monomers

Alk=CH3-C10H21 X=Cl, Br, I, F, NH2, CH2OH, CH2Cl, CH2Br, CHO, CO2H, method of obtaining them, photochromic polymers- polyazomethines, which are reversibly photocontrolled due to introduction into their structure, of dihetarylenthane class photochromic fragments.

EFFECT: obtaining new photochromic photocontrolled polymers for designing new information technologies.

8 cl, 25 dwg, 15 ex

FIELD: nonferrous metallurgy industry; aircraft industry; other industries; production of the heat-resistant alloys on the basis of the nickel.

SUBSTANCE: the invention is pertaining to the dispergated coloring agents intended for the ink-jet recording. The invention describes the dispergated coloring agent containing the coloring agent and the pseudo-finely-dispergated particles of the polarizable polymer having the dimension less, than the particles of the coloring agent. In the dispergated coloring agent the coloring agent itself and the particles of the polarizable polymer are attached to each other. At that the pseudo-finely-dispergated particles of the polarizable polymer contain the interpolymer consisting of the monomeric components containing, at least, one type of the hydrophobic monomer and, at least, one type of the hydrophilic monomer, where the hydrophobic monomer contains, at least, the monomer having the methyl group in α - position and the radically-polymerizable non-saturated double bond. The invention also describes the method of production of the indicated dispergated coloring agent and the water ink produced on its basis. The presented dispergated coloring agent has the high stability for a long time and practically in the absence of the surface-active substance or the dispergator. The ink produced on its basis has stability of blowout in the ink-jet printing method.

EFFECT: the invention ensures, that the ink produced on the basis of the presented dispergated coloring agent has the high stability of blowout in the ink-jet printing method.

20 cl, 14 dwg, 7 tbl, 15 ex

FIELD: chemistry of polymers, leather industry, chemical technology.

SUBSTANCE: invention relates to a method for preparing polymeric products that are used in processes for dressing leather or fur, in treatment and disinfection of natural and sewage waters. Method for preparing polymeric products involves the hydroxymethylation reaction of polyhexamethylene guanidine chloride with formaldehyde and arylation reaction of prepared product with aromatic compound comprising o-amino- or o-hydroxy-groups. The hydroxymethylation reaction is carried out in the presence of acetic acid or formic acid up to formation of trimethylol derivative of polyhexamethylene guanidine chloride. In some cases the arylation product is subjected for complex formation with transient metal salt or azo-coupling reaction with diazonium salt taken among group including sulfanilic acid, naphthionic acid, j-naphthyls, p-nitroaniline, 2,6-dichloro-4-nitroaniline. Invention provides simplifying, accelerating and enhancing the effectiveness of process in dressing leathers with derivatives of polyhexamethylene guanidine showing tanning effect, staining properties, flocculating capacity and high antibacterial activity.

EFFECT: improved preparing method.

3 cl, 1 tbl, 9 ex

The invention relates to the production of dye sintanol used for processing leather and fur
The invention relates to the production of the tanning agent used in the production of leather and fur

FIELD: physics, optics.

SUBSTANCE: invention relates to visible light absorbers, particularly novel azo compound monomers, particularly suitable for use in materials for implantable ophthalmic lens materials. The ophthalmic device material includes an azo compound, a device forming acrylic monomer and a cross-linking agent. The ophthalmic device is made from the ophthalmic device material and is in the form of intraocular lenses, contact lenses, keratoprostheses and corneal inlays or rings.

EFFECT: azo compounds are suitable for use as monomers which absorb part of the visible light spectrum (about 380-495 nm).

17 cl, 6 dwg, 3 tbl

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