52 results about "Photo damage" patented technology

The present invention relates to a hair treatment composition which provides an excellent finishing effect and superior protection against environmental, chemical, and grooming-associated damage. The compositions of the present invention comprise hydrolyzed protein having an abundance of anionic amino acids and in particular, sulphur-containing amino acids, as well as divalent cationic compounds, such that the anionic components of the hydrolyzed protein may effectively bind to the hair by means of cationic bridges. While bound to the hair, the sulphur containing amino acids in the hydrolyzed protein may serve as "decoys" for the effects of a variety of damaging agents. Compositions of the present invention may further comprise a vitamin compound which enhances these protective benefits.

Dual wavelength laser energy in the near infrared electromagnetic spectrum is described as destroying bacteria via photo-damage optical interactions through direct selective absorption of optical energy by intracellular bacterial chromophores. Use of various dual wave length laser systems include use of optical assembly including two distinct diode laser ranges (including 870 nm and 930 nm) that can be emitted to achieve maximal bacterial elimination without intolerable heat deposition. Related processes for medical procedures are also described.

A method to retard, prevent and reverse the sign of skin photo-damage, comprising administering, to a human subject in need thereof, a therapeutically effective dose of a formulation comprising an extract of Emblica officinalis as the active ingredient.

The invention relates to a method and composition for treating aged or photo-damaged skin. In one embodiment, the invention includes using a composition comprising about 1% to about 2% of 1-isobutyl-1H-imidazo [4,5,-C] quinolin-4-amine in a topical preparation or cream. In further embodiments, the method includes identifying topical compositions that can diagnose or identify precancerous region of the skin, as well as methods for treating aged or photo-damaged skin by applying a Toll-like receptor activator, such as 1-isobutyl-1H-imidazo [4,5,-C] quinolin-4-amine.

The invention provides an erbium-doped lithium niobate crystal and a preparation method thereof; the preparation method comprises the step of taking 99.99 percent of MgO, 99.99 percent of Er2O3, 99.99 percent of Nb2O5 and 99.99 percent of LiCO3 by weight percentage as raw materials, wherein the doping quantities of MgO, Er2O3 and Li/Nb are respectively 0-8mol%, 1-4mol% and 0.946-0.65mol%. The invention comprehensively utilizes the two means of doping of photo-damage resistant elements and growth of stoichiometric ratio, and simultaneously realizes the Er ion low-cluster concentration and strong photo-damage resistance of the lithium niobate crystal which is a substrate material for an active optical waveguide device, thereby obtaining the significantly improved optical emission property with a wave band of 1.5Mum and promoting the advancement of the active LN optical waveguide device to a practical use stage.

The invention provides an indium cerium iron triple-doped lithium niobate crystal and a preparation method thereof, belonging to the non-linear optical crystal field. The crystal is prepared by Li2CO3, Nb2O5, Fe2O3, CeO2 and In2O3 with purity of 99.99 percent; the preparation method comprises steps of: 1) weighing the powder according to certain proportion, fully mixing and then sintering the powder; 2) heating the powder by an intermediate frequency furnace, and adopting a pulling method to develop the indium cerium iron triple-doped lithium niobate crystal according to procedures of seeding, necking, shouldering, back shouldering, growing with a constant diameter, pulling and separating and annealing; 3) testing the crystal through two-wave coupling; and 4) testing the crystal through a direct transmission light spot distortion method. The invention comprehensively employs two means of light-resistant damage element doping and stoichiometric ratio growth, and obvious improves the photo damage resistance and the response time of the lithium niobate crystal on the basis of maintaining the original excellent performances of the lithium niobate crystal, and the invention will greatly promote the application of the lithium niobate crystal material in the three-dimensional body holographic storage field, and has broad market prospect.

The invention relates to a design of a polarizing prism, comprising a right-angle prism design and a film spacer layer option, wherein the crystal optical axis direction of the right-angle prism is parallel to the plane of a normal of an inclined surface and vertical to a normal of an end surface, and a wedge angle of the right-angle prism falls within a range of 38.10-39.30 degrees; and the film spacer layer is an organic film which is 50-100 microns thick, an elliptical hole is formed in the middle of the film spacer layer, and the proportion between the longer axis and the shorter axis of the ellipse is 1.3. A BBO (Barium Boron Oxide) crystal is cut according to requirements on the optical axis direction to be made into two right-angle prisms; and incident end surfaces and inclined surfaces of the prisms both need to be polished and plated with moisture-proof films. The device provided by the invention is applicable to lights within a wavelength range of 250-35000 nm and has the characteristics of extinction ratio of superior to 1x(10)-5 and photo damage resistance threshold of 1.2 GW/cm2; and the angle range of light incidence from -0.6 degree and +0.6 degree is allowed while the device is used within the wavelength of 250-35000 nm. The transmittance and the photo damage resistance of the laser polarizing prism are superior to those of a calcite polarizing prism.

A method for fabricating a semiconductor package is disclosed, which includes the steps of: providing a carrier having a release layer and an adhesive layer sequentially formed thereon; disposing a plurality of semiconductor chips on the adhesive layer; forming an encapsulant on the adhesive layer for encapsulating the semiconductor chips; disposing a substrate on the encapsulant; exposing the release layer to light through the carrier so as to remove the release layer and the carrier; and then removing the adhesive layer, thereby effectively preventing the semiconductor chips from being exposed to light so as to avoid any photo damage to the semiconductor chips.

The invention relates to a bio-particle three-dimensional manipulation device based on a coil in the technical field of life science. The device comprises a paramagnetism solution, a chamber and a chip, wherein the chamber is internally provided with the paramagnetism solution, the chip is bonded with the chamber and the chip is photo-etched with a coil array. By using a magnetic Archimedes effect and adopting a manipulation chip formed and assembled by an MEMS (Micro-Electro-Mechanical System) process, the invention has simple integral structure and easy manipulation, and can realize bio-particle micro-manipulation in a non-contact way without mechanical or photo damages under common magnetic field environment at normal temperature.

The invention discloses a novel cone lens generating a single bottle beam, which is an axicon, wherein a concave circular truncated cone structure is formed at the bottom of the axicon, and the bottom angle of the circular truncated cone structure is less than that of the axicon. The novel cone lens can acquire the single bottle beam through one element, has the advantages of relatively easy element processing, simple structure, high conversion efficiency and high photo damage threshold, and provides a novel concise and efficient way for acquiring the bottle beam; furthermore, the size of the single bottle beam can be adjusted by adjusting the size of the bottom angle or the inner bottom radius of the circular truncated cone structure. In practical application, the novel cone lens can be used as laser conduits, optical tweezers, optical wrenches and other tools, and can be used for confining microscopic particles, neutral atoms, molecules, biological cells and the like by laser, thus has special significance in life science and nano-technology, in particular single-plane and multi-plane manipulation on microparticles.

The invention relates to topical compositions comprising a fluorescent dye that absorbs UVA and UVB radiation and converts it into a healing light, in combination with a dermatologically acceptable excipient. The compositions of the invention are useful for repairing photo-damaged skin cells and reducing or preventing future skin damage as a result of exposure to UV light.

The invention relates to the technical field of photoelectric crystals, and especially relates to a double-doped lithium niobate crystal which comprises SmxMy(Li0.946NbO3)100-x-y, wherein M is one of Mg and Zn; 0.15<=x<=0.3; when M is Mg, 5<=y<=8; when M is Zn, 6<=y<=7. In the double-doped lithium niobate crystal of the invention, rare earth ion samarium Sm adopts lithium niobate doped with photorefraction-resistant ion Mg or Zn as a substrate, not only has high photo damage resistance, but also realizes short-wavelength orange red light output; with the excitation of ultraviolet light, Sm realizes the output of orange red light of 606 nm and 613 nm within a visible light wave band directly in a down-conversion manner, realizes the high-power output of orange red visible light. The invention also relates to a preparation method of the double-doped lithium niobate crystal, and the prepared high-quality double-doped lithium niobate crystal has no macroscopic defect, no obvious growth striation, and uniform distribution of the doped ions.

This invention relates to certain complexes of ascorbic acid and its derivatives with certain aryl alkyl ketones; said complexes having being formed via a kinetically-controlled process, and having general chemical formula (I) in FIG. 1. Said complexes can be in their various optically active or racemic forms. This invention also relates to a method of treatment of skin condition, including dark skin, age spots, acne, inflammation, loss of cellular antioxidants, collagen loss with aging, loss of skin pliability, loss of skin suppleness, skin wrinkles, oxidation, damage from radiation, malfunction of matrix metalloproteases, malfunction of tyrosinases, damage from free radicals, photo-damage, and combinations thereof; [FIG. 1].

A topical composition of improved spreadability and aesthetical appeal is provided, which contains a stable emulsion base formed by combining an alkoxylated diphenylacrylate compound and a nonionic organic emulsifier with a pharmaceutically or cosmetically acceptable carrier. Preferably, the topical composition is a sunscreen composition that further contains inorganic or physical sunscreen agents dispersed in such a stable emulsion base, which is characterized by improved photo-protection of the skin and is effective in preventing/reducing photo-damage of the skin upon exposure to sunlight or other sources of light in the ultraviolet (UV), visible, and infrared (IR) ranges.

The invention relates to a Mg, Hf and Fe tri-doped lithium niobate crystal and the method for preparing the same. The method solves the problems that the response time is slow and the photo damage resistance ability is low in the Fe doped lithium niobate crystal prepared by the prior art. The Mg, Hf and Fe tri-doped lithium niobate crystal is prepared by Li2CO3, Nb2O5, Fe2O3, MgO and HfO2. The method comprises the following steps: (1) weighing up the required components; (2) sintering the components; (3) growing the crystal by czochralski method; (4) obtaining the Mg, Hf and Fe tri-doped lithium niobate crystal by polarization treatment. The method obviously improves the photo damage resistance ability of the lithium niobate crystal and reduces the response time based on maintaining the original excellent performance of the lithium niobate crystal because of doping elements Mg, Hf and Fe in the lithium niobate crystal.

The invention relates to a method and a device for identifying laser damage of an optical thin film based on polarization parameters. The method and the device overcome phenomenon of 'erroneous judgment' frequently caused by judging whether the thin film is damaged or not in the prior art, are suitable for on-line judgment of surface damage of various optical elements and coating elements in laserdamage threshold measurement, and have the characteristics of rapidness and accuracy. The device comprises a two-dimensional workbench for mounting a thin film test sample, an incident light path anda reflection light path are arranged on the two sides of the two-dimensional workbench respectively, a light source, an optical filter, a collimator and a polarizer are sequentially arranged on one side of the incident light path, a wave plate, a polarization analyzer and a photoelectric receiver are sequentially arranged on one side of the reflection light path, a laser emitting end of a high-energy laser directly faces the surface of the thin film test sample, an attenuator and a convergent lens are sequentially arranged in the laser pulse output direction of the high-energy laser, and thetwo-dimensional workbench, the wave plate, the polarization analyzer, the high-energy laser, the receiver and the attenuator are all connected to an industrial control computer.

The invention discloses a laser damage threshold and nonlinear absorption co-target-surface measuring device and method. The device comprises an ultrafast laser, an adjustable attenuation sheet, a shutter, a focusing lens, a first spectroscope, a first photoelectric detector, a to-be-measured sample, an electric control displacement table, a second spectroscope, a second photoelectric detector, abeam expander set, a CCD camera, a computer and a light beam quality analyzer, wherein the adjustable attenuation sheet, the shutter, the focusing lens, the first spectroscope, the to-be-measured sample, the second spectroscope, the beam expander set and the CCD camera are sequentially arranged in the laser output direction of the laser device; and the effective area of the laser focus is measuredby adopting the beam quality analyzer. In addition, the same focusing light field and image transmission method are adopted, it is ensured that a light source causing sample damage and a light sourceexciting sample nonlinear absorption have completely equal target surface light spot distribution, and the relation between laser damage and sample nonlinear absorption is further analyzed conveniently.

A topical composition containing an alkoxylated diphenylacrylate compound and an aryl carboxylic ester is provided. Preferably, the topical composition is a sunscreen composition containing α-ethylhexyl α-cyano-β-(4-methoxyphenyl)-β-phenylacrylate and 2-phenylethyl benzoate, and optionally further containing 4,4′-t-butyl methoxydibenzoylmethane, which is characterized by improved photo-protection of the skin and is effective in preventing/reducing photo-damage of the skin upon exposure to sunlight or other sources of light in the ultraviolet (UV), visible, and infrared (IR) ranges.

The invention relates to a preparation method of a collagen polypeptide skin photo-damage repairing film, and belongs to the field of biomedical materials. According to the collagen polypeptide skin photo-damage repairing film disclosed by the invention, the basic framework structure of the film is formed by collagen polypeptide, sodium carboxymethylcellulose, glutaraldehyde and starch, glycerol is added as a moisturizer to control the moisture of the film, and antioxidants of ganoderma lucidum polysaccharides, mushroom polysaccharides, lycium barbarum polysaccharides and the like are added; finally the uniformly mixed pasty mixed solution is poured in a die and formed, and dried in an oven at a constant temperature; and the collagen polypeptide skin photo-damage repairing film with good biocompatibility and oxidation resistance is obtained after being uncovered.

The invention provides a rare earth doped gain fiber and a fiber laser oscillator. According to the thulium-doped gain fiber and the fiber laser, a low-doping thermally conductive channel is established in the optical fiber by utilizing the mechanism in which the thermal conductivity of the material increases as the concentration of the doped ions decreases, thereby accelerating the heat dissipation to prevent heat from accumulating in the center of the core, and effectively preventing the generation of thermal lens effects and reducing photo damage to materials, which improves the output beamquality and the output power; and the preparation method of the core is simple and easy to implement.

The invention relates to the field of fruit tree cultivation, in particular to a cultivation method of actinidia kolomikta. When leaves of the actinidia kolomikta start to go red, 5%-15% of shading net is adopted for shading. On the basis of determining the colored leaf occurrence space and time rule, the method aims at the situation that the photo damage phenomenon of color leaves is likely to happen at the development later stage, so that the leaf photosynthesis efficiency is affected. The method is characterized in that the occurrence period and the occurrence position of the color leaves of the actinidia kolomikta are investigated for the first time, on the basis of understanding the occurrence rule of the colored leaves, the photosynthesis efficiency of the colored leaves under different shading degree conditions is measured from the perspectives of the photosynthetic rate and the photochemical activity through shading in the key period when photo damage is likely to happen, the shading degree through which photo damage of the colored leaves can be avoided and the photosynthetic rate cannot be reduced is screened out, therefore, the high photosynthesis efficiency of the colored leaves can be kept within the whole growth period, and it is avoided that photo damage of the colored leaves is generated, so that the leaf photosynthesis efficiency is seriously reduced and even lost.