162 results about "Light damage" patented technology

Disclosed is a method for preparing quasi-periodic micro-lens arrays through femtosecond laser wet etching. The method comprises that the velocity of a target material moved by an accurate processing platform is controlled according to the individual average size of quasi-periodic micro lenses needed to be processed, femtosecond lasers act for one pulse on the target material surface at a fixed interval, and a light damage area is produced on the target material with the acting focus of each femtosecond laser pulse serving as a center; chemical corrosion is performed on the target material processed by the femtosecond lasers through a hydrofluoric acid solution with a volume concentration in a range of 1% to 10%, and ultrasonic water-bath heating is assisted; and the corroded target material is cleaned thoroughly in deionized water to obtain a template finished product of mass quasi-periodic micro-lens arrays. The method has the advantages of being high in efficiency, low in cost, controllable in micro-lens individual shape size and the like, and negative effects of air breakdown effects of laser focusing, periodic light field coupling stacking effects and the like generated in a dodging process can be prevented effectively.

The invention discloses an amido benzopyran cyanine fluorochrome and a probe as well as a synthetic method and application thereof. The fluorochrome is any one kind in structural formulas I-II as shown in the description. According to near infrared fluorochromes I and II with an amido benzopyran cyanine structure provided by the invention, the fluorescence quantum yield is high, the light stability is good, the fluorescence-emission spectrum ranges from 650nm to 900nm and belongs to near infrared spectrum areas, the fluorescence imaging analysis in a living body level can be realized, meanwhile, the penetrating power of biological tissue samples is enhanced, the light damage is reduced, the fluorescence of biomolecules per se is relatively weak, and the biological system can be prevented from self-emitting fluorescent interference to obtain a relatively high signal-to-noise ratio, so that the sensitivity is improved.

The invention discloses a combined cone lens for generating a long-distance diffraction-free Bessel beam. The combined cone lens has a structure formed by tightly gluing two conical surfaces of a positive-axis pyramid and a negative-axis pyramid. Base angles of the conical surfaces of the positive-axis pyramid and the negative-axis pyramid are equal, and a refractive index of the positive-axis pyramid is slightly more than that of the negative-axis pyramid. In the invention, the positive-axis pyramid and the negative-axis pyramid can be manufactured by using two kinds of common optical glass having slightly-different refractive indexes and combined, and the long-distance diffraction-free Bessel beam can be obtained by a combined single element, so the problems that the conventional pyramid cone has a small cone angle and is difficult to process are solved. The combined cone lens for generating the long-distance diffraction-free Bessel beam has the advantages of easiness of element processing, simple structure, high conversion efficiency and high light damage threshold and provides a new simple and effective way to acquire the long-distance diffraction-free Bessel beam. Moreover, a diffraction-free distance of the diffraction-free Bessel beam can be adjusted by adjusting the radius of an incident beam and a difference value between the refractive indexes of the positive-axis pyramid and the negative-axis pyramid. The combined cone lens for generating the long-distance diffraction-free Bessel beam has a great practical value in the fields of high-precision collimation, large-scale linear measurement, equipment manufacturing industry and laser communication.

The invention discloses a method and a device for separating an optical crystal by using two laser beams. The method comprises the following steps of: forming a damage section formed by light damage lines in the optical crystal by using a first laser beam with high peak power and low pulse energy; and acting on the damage section formed by the light damage lines by using a second laser beam with low peak power and high pulse energy so as to separate the optical crystal. The device comprises a two-dimensional working table and two sets of laser processing systems; each laser processing system comprises a Z-axis moving mechanism, and a laser, a beam expansion collimating lens, a first reflection lens and a focusing lens which are positioned on the same light path; and the focusing lenses are fixed on the Z-axis moving mechanisms. In the invention, the optical crystal is separated by using the characteristics that a mechanical action force is absent in the mutual action between the laser and the material, and the material is transparent to laser; therefore, aims of no fragmentation, high separating precision, arbitrary direction separation and no pollution during separation of the optical crystal can be fulfilled. The invention is particularly applicable to separation of potassium dihydrogen phosphate (KDP) optical crystals.

The invention discloses a green quantum dot film and a preparation method of a backlight module thereof. The method performs functional design on the protective layer of the green quantum dot film; the outer surface of the protective layer has a good light diffusion effect after being coated, and inorganic diffusion particles in the coated layer play a role in blocking light in some bands, thus the light damage caused by long-time light irradiation on the quantum dot is slowed down. The invention also provides a using method of the green quantum dot film, the using method matches the green quantum dot film and a blue chip with red phosphor to make a novel LED light source, and the using method improves the stability of the quantum dot film while greatly increasing the color gamut coverageof the LCD.

The invention relates to a thermal imager for resisting strong-light damage, which comprises an infrared camera lens, a shutter and an infrared detector, wherein the shutter is connected with a drive motor capable of driving the shutter to be opened and closed. The thermal image also comprises an FPGA (Field Programmable Gate Array) controller, wherein the FPGA controller comprises an image gray monitor module, am image comparison module and a shutter control module. According to the invention, a method for resisting the strong-light damage comprises a step of controlling a detector to close the shutter on a condition that the FPGA controller detects that multiple frames of images include strong light so as to ensure that the strong light cannot pass through the shutter to damage an imaging element behind the shutter, therefore, the effect of protecting the thermal imager can be achieved.

The invention discloses an anti-ageing face cream composition. The anti-ageing face cream composition contains nonapeptide-1, copper tripeptide-1, acetyl octapeptide-3 and palmitoyl tripeptide-5, wherein nonapeptide-1 can fade stains, brighten skin color and improve dark complexion; copper tripeptide-1 can reduce light damage and stain, brighten skin color, astringe loose skin, improve the elasticity, density, firmness and clarity of skin, decrease fine creases and deep wrinkles and greatly increase the proliferation of keratinocytes; acetyl octapeptide-3 can reduce deep wrinkles caused by contraction of facial mimetic muscles, especially wrinkles around the forehead and eyes; and palmitoyl tripeptide-5 can stimulate collagen synthesis in human fibrocytes and reduces any type of wrinkles. Through combined usage of the above components, the anti-aging face cream composition can significantly improve dull yellow skin color and fine creases just appearing on skin, fades and reduces long-lasting deep laugh lines, dry lines, nasolabial folds, etc., enhances early-stage aged and already aged skin, and has obvious anti-aging effect.

A method of reducing light damage in a shutterless imaging device includes receiving a signal from a hardware device. The signal from the hardware devices is analyzed. In response to the analysis of the signal from the hardware device, a lens of the shutterless imaging device is adjusted. Adjusting the lens spreads out energy of far-field image light incident on an image sensor of the shutterless imaging device.

The invention provides a high-power ASE light source with multi-section cascade 1064nm wave bands. The ASE light source comprises a source beam combiner, an optical isolator, an active doubly coated optical fibre, a cladding mode filter, a functional multi-mode optical fibre, a semiconductor pumping laser and the like. The ASE light source is characterized by comprising an n-section cascade structure, wherein the output power of the semiconductor pumping laser is divided into n parts according to certain proportion for respectively pumping N YDF (Ytterbium-doped Fibre) sections, so that pumping power at each level is rationally distributed and sufficiently utilized; the active beam combiner is adopted to simply the process, so that a complicated welding and re-coating process is avoided in the use of the traditional beam combiner; the functional multi-mode optical fibre is adopted to restrain the light reflection on the end surface of the optical fibre and to reduce the light damage effects on the end surface of the optical fibre. Besides, the adopted cladding mode fibre can effectively filter the pump light of a residual cladding, and prevent the residual cladding from breaking the effects. In a word, the high-power ASE light source can effectively restrain the generation of the laser, and can ensure the high-power ASE light output.

Resveratrol, a component found in common edible plants, including peanuts and red grapes, is a phytoestrogen. Resveratrol can inhibit the proliferation of skin epidermal cells (keratinocytes) and promote their differentiation. Resveratrol has also been found to relieve skin irritation caused by alpha hydroxy acids. Resveratrol is effective in improving the appearance of wrinkled, lined, dry, flaky, aged or photodamaged skin and improving skin thickness, elasticity, flexibility, radiance, radiance and fullness.

The invention discloses an efficient and stable anti-light and anti-oxidation composition, which is prepared from the following components in parts by weight: 0.0001 to 0.2 part of astaxanthin; and 0.01 to 2.0 parts of glucosylrutin. The astaxanthin and the glucosylrutin are compounded, the light stability is high, and good light damage resistance and oxidation resistance effects are achieved. Theefficient and stable anti-light and anti-oxidation composition disclosed by the invention can be applied to preparation of skin care products, including smoothing toner, toner, essence, emulsion, face cream, essence, facial masks, sun cream, spray, essential oil, massage cream and the like. The efficient and stable anti-light and anti-oxidation composition disclosed by the invention can also be compounded with glycerol, glyceryl stearate, hydrogenated palm oil/palm kernel oil PEG-6 esters, lysolecithin, tocopherol and water to form a compound.

The invention belongs to the interdisciplinary field of cultural relic protection, lighting technology and analytical chemistry, relates to a scientific, precise and operable technology for evaluatingthe illumination damage of a light source to cultural relics, and provides a method for detecting and evaluating light source products produced by different enterprises. The method for determining the light damage on cultural relics based on Raman spectroscopy analysis comprises: 1) preparation of a model specimen, wherein based on a cultural relic made of a single material, a model specimen is prepared from the single material for forming the cultural relic, and based on a cultural relic made of a composite material, model specimens are respectively prepared from the main materials for forming the cultural relic; 2) selection of experimental light sources, wherein a standard comparing light source is selected, and a to-be-detected experimental light source is selected; 3) irradiation experiment; 4), parameter detection, wherein the quantitative influence of the illumination on the microscopic molecular structure of the material is obtained by analyzing the change of the Raman spectroscopy characteristic peaks before and after the irradiation of the specimen; and 5), data analysis. The method of the present invention is mainly used for cultural relic protection and lighting occasions.

The invention relates to a reflected light damage preventing device for a high-power semiconductor laser, belonging to the technical field of laser. The reflected light damage preventing device comprises a polarization spectroscope, a lambda/4 wave plate and an absorber. In the invention, the polarization spectroscope and the lambda/4 wave plate are sequentially placed in an outgoing light path of a semiconductor laser light-emitting chip, a property that a semiconductor laser beam is a linearly polarized light is utilized, the polarization property of a reflected light beam of a workpiece is changed by the lambda/4 wave plate, and a reflected light is separated from an outgoing light beam of a semiconductor laser array by the polarization spectroscope so that the reflected light cannot irradiate the surface of the semiconductor laser light-emitting chip to prevent damage of the reflected light of the semiconductor laser in the processing of laser materials.

A topical composition comprising: (a) conjugated linoleic acid and/or derivatives thereof; (b) a retinoic acid, retinol, retinyl ester and/or an LRAT/ARAT inhibitor; and (c) a dermatologically acceptable vehicle. Such skin care compositions are useful for treating and/or preventing normal, but undesirable, skin conditions selected from the group consisting of wrinkling, sagging, photodamaged skin, dry skin and age spots and soothing sensitive skin.

The invention belongs to the technical field of skin light damage repair, and discloses application of exosome secreted by a human umbilical cord mesenchymal stem cell to preparation of a medicine forrepairing skin ultraviolet injury. The umbilical cord mesenchymal stem cell exosome is a natural vesica, so that the immunogenicity is lower. Meanwhile, the exosome has functions of oxidation resistance, antiinflammatory effect, proliferation, apoptosis inhibition, collagen synthesis and the like similar to the functions of a parent cell in tissue regeneration repair, and can play a role in skinprotection in multiple ways. Therefore, the exosome hopefully become an alternative strategy for decellularization treatment, and has important clinic application prospect and market transformation value in multiple skin regeneration related diseases.

The invention discloses a preparation method of a biologically active chronic wound auxiliary material and an application thereof. The method firstly prepares an epsilon-polylysine or polyethyleneimine functionalized polyether F127 polymer, and then oxidizes sodium alginate or pullulan by sodium periodate to obtain polysaccharide having an aldehyde group, a hydrogel having a three-dimensional network structure is formed by reacting a Schiff base between the cationic functionalized F127 polymer and the aldehyde-based polysaccharide, the exosomes are loaded into the hydrogel by electrostatic interaction with the cationic polymer, and the bioactive antibacterial and photodamage-resistant chronic wound auxiliary material can be prepared. The bioactive antibacterial and photodamage-resistant chronic wound auxiliary material prepared by the method has excellent mechanical properties such as temperature sensitivity, injectability and self healing, good antibacterial, anti-light damage and promotion of wound healing. Therefore, the hydrogel has the good application prospect in antibacterial, anti-light damage and promoting chronic wound healing.

The invention relates to a light damage measurement instrument based on the relationship between pupil size and ambient brightness, which consists of a light source, a field diaphragm, a control table, an illuminance probe, a controllable diaphragm, an integrating sphere, a spectrometer and a computer, wherein the light source, the field diaphragm and the integrating sphere are positioned on the control table respectively, the controllable diaphragm is connected with the integrating sphere which is connected with the spectrometer, the spectrometer is connected with the computer which is connected with the illuminance probe and the controllable diaphragm, the illuminance probe sends illuminance to the computer in the form of electric signal, the computer converts the illuminance value to a brightness value by means of computation, determines the size of pupil in human eyes under relevent situations according to the brightness level of the brightness value, and sends a control signal to change the size of the controllable diaphragm, afterwards, brightness is measured and finally, relevant spectrum data and brightness are obtained in the computer. The instrument effectively simulates the quantity of light entering pupil under different brightness levels through the controllable diaphragm; the data derived from measurement accords better with actual situation. Measurement precision can be effectually improved by the integrating sphere instead of using a portable optical spectrum instrument directly. Direct brightness measurement is replaced by the use of the illuminance probe for measurement.

The invention relates to application of a ginsenoside Rb1 and Rd combination to preparation of a medicine for treating photoreceptor cell death related diseases. A mouse model suffering from retinal light damage is adopted to simulate the common key pathological links in the process of various degenerative retinal diseases so as to research the intervention effects of the ginsenoside Rb1 and Rd combination on the mouse model suffering from retinal light damage, and the results show that the medicinal combination can maintain the format of the retina outer nuclear layer, effectively prevent the retina outer nuclear layer from degenerative damage and thickness reduction, inhibit death of photoreceptor cells, block oxidative stress of retinal pigment epitheliums and photoreceptor cells, effectively inhibit retinal damage related immuno-inflammatory responses and remarkably improve the degenerative retinal diseases. Therefore, the ginsenoside Rb1 and Rd combination can be used for preparing the medicine for treating various degenerative retinal diseases including age-related macular degeneration, retinal pigment degeneration, Stargardt disease, cone-rod cell dystrophy, diabetic retinopathy and the like.

The invention relates to a video restoration method, a video restoration device, computer equipment and a storage medium, and belongs to the technical field of video processing. The method comprises the following steps: acquiring a to-be-restored video frame; determining the image quality damage degree of the to-be-restored video frame; if the image quality damage degree of the to-be-restored video frame is greater than or equal to a preset damage degree threshold, performing first restoration processing on the to-be-restored video frame through at least one restoration algorithm according toa serious damage restoration sequence; and if the image quality damage degree of the to-be-restored video frame is smaller than a preset damage degree threshold, performing second restoration processing on the to-be-restored video frame through at least one restoration algorithm according to the light damage restoration sequence. By adopting the method and the device, after the to-be-restored video frames are distinguished, the to-be-restored video frames can be restored through at least one restoration algorithm according to different restoration sequences. The restoration processing is relatively targeted, and the image quality of the obtained restored video frames is relatively high.

The present invention discloses a moisturizing protective milk and a preparation method thereof. A butterflybush flower extract, a laminaria ochroleuca extract and a caprylic/capric triglyceride complex are combined with a composite berry ultraviolet protective agent complex, synergy effects of the butterflybush flower extract, laminaria ochroleuca extract, caprylic/capric triglyceride complex andcomposite berry ultraviolet protective agent complex in nourishing and moisturizing, anti-oxidation, sunscreen and after-sun repair are fully exerted, a multi-layered protective effect is formed, andthe moisturizing protective milk effectively protects skins from harmful light damages.

A light sensitive media packaging with unique shrink-wrap light protection label that works as a light barrier to protect media from light damage.