882 results about "Light absorbance" patented technology

A living body is irradiated with a first light beam having a first wavelength and a second light beam having a second wavelength which is different from the first wavelength. The first light beam and the second light beam, which have been reflected or transmitted from the living body, are converted into a first electric signal corresponding to the first wavelength and a second electric signal corresponding to the second wavelength, as the observed pulse data. A light absorbance ratio obtained from the first electric signal and the second electric signal is computed, for each one of frequency ranges dividing an observed frequency band. It is determined that noise is not mixed into the observed pulse wave data in a case where a substantial match exists among light absorbance ratios computed for the respective frequency ranges.

A lytic reagent composition and the method of use for differential analysis of leukocytes using flow cytometry are disclosed. The lytic reagent composition includes a short chain alkyl oxyethanol, such as 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, or 2-isopropoxyethanol, in a sufficient amount to preserve leukocytes; a non-lysing nonionic surfactant as a debris solublizer; and an inorganic buffer to maintain pH of the lytic reagent composition in a range from 9.1 to 10.7. The lytic reagent composition is used to lyse red blood cells and preserve leukocytes, as well as used as the sheath reagent for the focus flow measurement. The lytic reagent composition, when used on a flow cytometric analyzer with multiple angle light scatter and light absorbance measurements, enables differentiation of leukocytes into five subpopulations.

The invention discloses a device and a method for measuring square wave modulated photoelectric volume pulse wave. A microprocessor outputs square waves which have different frequencies and form a double ratio relationship; the square waves drive at least two light-emitting diodes; the light from the light-emitting diodes are received by a photosensitive device after passing through tested finger; the photosensitive device converts the light into a voltage signal; the voltage signal is converted into a predefined amplitude value voltage signal by a current/voltage conversion amplifier; an analogue-to-digital converter converts the predefined amplitude value voltage signal into a digital signal; the microprocessor processes the digital signal to obtain photoelectric volume pulse wave and valley value and peak value thereof, and gets spectrum value by the valley value and the peak value. The measurement method comprises the following steps of: separating the digital signal to obtain the photoelectric volume pulse wave and removing interference of background light by the microprocessor; getting the valley value and the peak value according to the photoelectric volume pulse wave; and calculating the valley value and the peak value to obtain light absorbance difference, and obtaining the spectrum value by the light absorbance difference. The accurate measurement, simple circuit and low cost are realized.

A portable system and method for measuring the concentration of multiple chemical or biological substances where an onsite analysis of such substances is needed. The new and original handheld sensor system uses a disposable optical test element and a spectroscopic detector that measures the test element response to specific analytes through a change in light absorbance, luminescence, and other forms of light-based response. In this way, reflection light intensities indicative of the test element response can be used to measure the concentration of the target analytes. The sensor system is also capable of being interfaced to an information processing unit or computer so that analytical data can be manipulated or stored electronically.

The present invention provides an electrophotographic photoconductor which contains a substrate, at least a photosensitive layer and a surface layer being formed on the substrate in this order; the surface layer contains a cured material which is cured by irradiating with light a trifunctional or more radical polymerizable monomer having no electric charge transportable structure, a radical polymerizable monomer having an electric charge transportable structure, and a photo-radical polymerization initiator; the photo-radical polymerization initiator contains a titanocene derivative; and the relation between the absorption edge wavelength HA (nm) in the light absorption spectrum of the radical polymerization initiator and the absorption edge wavelength HB (nm) in the light absorption spectrum of the radical polymerizable monomer having an electric charge transportable structure is represented by HA>HB and satisfies HA−HB>40 nm.

The depth and a relative dimensional factor of a defect present in the interior of a silicon wafer are measured, and the number of such defects is calculated. A laser beam having a larger energy than the band gap of silicon is radiated obliquely to the semiconductor wafer and a scattered beam from a defect present in a subsurface layer of the wafer is detected by an image pick-up device. The temperature of the wafer is changed to at least two temperatures of T1 and T2 or to any one of plural temperatures by means of a heater and the intensity of a scattered beam is measured. It is taken into account that the light absorbance of silicon and the penetration depth of light in silicon vary depending on temperature, to determine the depth and a relative dimensional factor of an internal defect which causes scattering of light, as well as the number of such crystal defects.

The invention discloses a synthetic method and application of a visible-light responding carbon nitride/iron sesquioxide nano composite, belongs to the fields of composite preparation technologies and photocatalysis and aims to solve the problems that a conventional carbon nitride material is small in specific surface area, high in photon-generated electron-hole recombination rate, low in solar energy utilization ratio and the like. The composite is prepared by taking melamine and iron nitrate as raw materials and methanol as a solvent and adopting the chemical reaction method and the heat treating process. Compared with carbon nitride, the prepared carbon nitride/iron sesquioxide nano composite has a wider light absorption range (expanded from the ultraviolet region to the visible region), greatly improves the solar energy utilization ratio, meanwhile, has a larger specific surface area, is low in photon-generated electron-hole recombination rate, and can effectively degrade Rhodamin B under visible light. The advantages that the preparation technology is simple, the raw material cost is low, mass production is available, and the obtained composite is large in specific surface area, high in solar energy utilization ratio, excellent in catalytic performance, and good in application prospect are achieved.

The invention discloses a chirality graphite phase carbon nitride polymer semiconductor photocatalyst as well as a preparation method and applications thereof, and belongs to the technical field of material preparation and photocatalysis. Chirality graphite phase carbon nitride is synthesized by taking cyanamide as a precursor and chirality mesoporous silica as a hard template, and removing the template through heat polymerization. The chirality graphite phase carbon nitride prepared by the invention has a chirality spiral-bar-shaped morphology and a micro-nano structure, shows particular circular dichroism and optical activity by when being compared with traditional body phase carbon nitride, has a great specific surface area and a high optical absorption performance, and shows a favorable optical catalysis hydrogen generating performance under visible light. According to the invention, the chirality graphite phase carbon nitride polymer semiconductor photocatalyst is synthesized; a preparation technology is improved; and the chirality graphite phase carbon nitride polymer semiconductor photocatalyst as well as the preparation method and applications thereof have an important application prospect.

Photoresist polymers and photoresist compositions containing the same are disclosed that comprise a chain linking compound including an alcohol group and a boron compound represented by Formula 1 as a moiety. As a result, the photoresist polymer and the photoresist composition containing the same have excellent transmissivity, etching resistance, thermal resistance and adhesive property, low light absorbance and high affinity to an developing solution at a wavelength of 13 nm as well as 248 nm and 157 nm, thereby reducing line edge roughness (LER).

• • wherein R₁, R₂, R₃, R₄ and R₅ are as defined in the specification.

A light absorbing layer of a CIGS solar cell and a method for fabricating the same are provided. According to the present invention, a cuprous sulfide layer is prepared by a sputtering process. Then, a CIGS sol-gel solution is provided onto the cuprous sulfide layer by an immersion coating, spin coating, printing, or spray coating process. The CIGS sol-gel solution is then baked to form a plurality of a CIGS stack layers containing copper (Cu), indium (In), gallium (Ga), and selenium (Se). A rapid thermal process is then conducted for melting the cuprous sulfide layer and the CIGS stack layers to form a copper/indium/gallium/sulfur/selenium (CIGSS) light absorbing layer. The CIGSS light absorbing layer is provided for a solar cell to improve the photoelectric transformation efficiency and the light absorbance.

The invention discloses a biomass charcoal based urea which mainly comprises of biomass carbon black and urea. The biomass carbon black is prepared by using agricultural wastes as a biomass material for low-temperature carbonization to form porous biomass carbon black. By using microporous biomass carbon, the biomass carbon based urea has strong adsorption capacity and pretty good light absorbance and warming effects. The biomass carbon based urea has very good slow release ability to effectively reduce leaching loss and waste of the fertilizer, can be preserved for a long time at the normal temperature, and can also be mixed with other organic or inorganic fertilizers for granulating and drying without being affected but with remarkably increased fertilizer effect.

The invention discloses a terahertz or infrared micro-bolometer, which comprises a micro-bridge structure of a micro-bolometer for an uncooled terahertz detector or an uncooled infrared detector, wherein a thermistor material and a light absorbing material in the micro-bridge structure are one of a vanadium oxide-fullerene binary composite thin film or a vanadium oxide-fullerene-carbon nanotube ternary composite thin film. The vanadium oxide composite film is formed by compounding two-dimensional vanadium oxide and zero-dimension fullerene components or two-dimensional vanadium oxide, zero-dimension fullerene and one-dimensional carbon nanotube components. The micro-bolometer and a manufacturing method thereof can overcome the defects existing in the prior art and are suitable for large-scale industrial production; and the working performance of the device is improved.

A spread illuminating apparatus includes LEDs as point light sources fixedly mounted on a flexible printed circuit, a light conductor plate having a light inlet surface, a light reflector plate disposed under the light conductor plate, a light absorbing member constituted by a black tape, and a sheet metal case having walls on all four sides and housing the component members described above. An end of the light reflector plate located toward the LEDs is positioned beyond the light inlet surface of the light conductor plate, and recesses are provided at the end of the light reflector plate. A black tape as a light absorbing member is disposed on the outer surface of the light reflector plate along the light inlet surface, and a light absorbing region is formed such that the black tape is exposed through the recess.

A light transmitting filter including a light absorbing layer and a transparent layer having a microstructured front surface and a microstructured back surface, wherein the front surface is embedded in the light absorbing layer. The microstructures of the front surface provide a path for light transmittance through the light absorbing layer and the microstructures of the back surface focus the transmitted light thorough the path. The light filter can include an optically clear conformable coating covering the microstructured back surface of the transparent layer.

The invention belongs to the field of material science and specifically relates to a TiO2 powder with visible light catalytic activity and a preparation method thereof. The TiO2 powder of the invention contains crystal phases of: 90-100 wt% of anatase (TiO2), and 0-10 wt% of rutile (TiO2). The preparation process comprises main points of: preparing a forerunner liquid A from tetra-n-butyl titanate, absolute ethyl alcohol and glacial acetic acid; preparing secondary distilled water and absolute ethyl alcohol into a solution; adding hydrochloric acid and adjusting a pH value to 1-5; preparing a dropping solution B; adding the dropping solution B into the forerunner liquid A; carrying out isothermal stirring in a water-bath; carrying out stewing for a while, drying, grinding and calcining to obtain the TiO2 powder with high photocatalytic activity. The TiO2 powder of the invention has strong light absorption and photoresponse in wide spectrum scope namely under ultraviolet light and visible light irradiation and has visible light catalytic activity; and the method has advantages of simple preparation technology, low-cost equipment and easily controlled reaction process.

A curved back-projection screen having an angle of curvature greater than 180° is described such as a wrap-around cylindrical or dome screen. The screen includes a first layer and a second synthetic resin diffusing layer on the first layer, the second synthetic resin diffusing layer containing a light absorbing material and light diffusing particles embedded in a resin material, with the second synthetic resin diffusing layer having a value of the product of the absorption coefficient and thickness of between 0.1 and 2. The second synthetic resin diffusing layer can be applied by spraying.

The invention discloses a manufacturing method of fingerprint acquisition optical fiber panel. The method comprises the steps of: inserting a core glass rod into a sheath glass tube for combination, and drawing the combination into a single optical fiber wire; drawing stray light absorption glass into a stray light absorption wire; arranging the single optical fiber wires into a cavity of a bar die, and inserting stray light absorption wires into the single optical fiber wires so as to form a composite bar; carrying out drawing to form a composite optical fiber; arranging the composite optical fibers once again into the bar die to form a secondary composite wire bar, and carrying out drawing to form an optical fiber panel blank bar; and rising the temperature of the optical fiber panel blank bar from a room temperature to about 600 DEG C for about 6 hours, maintaining the temperature for about 6 hours, then decreasing the temperature to about 30 DEG C for about 60 hours, then carrying out cutting to form the panel, and finally carrying out forming machining and fine machining. According to the invention, the material cost is low, the arranging and melting press processes are not needed, the production technology is simplified, the machining period is shortened, a large number of melting press dies, melting press furnaces and melting press equipment are not needed, the cost is substantially lowered, and the market competition demand of a fingerprint identification system is met.

A light-emitting element, a light-emitting element unit and a light-emitting element package are provided, which are each reduced in reflection loss and intra-film light absorption by suppressing multiple light reflection in a transparent electrode layer and hence have higher luminance. The light-emitting element 1 includes a substrate 2, an n-type nitride semiconductor layer 3, a light-emitting layer 4, a p-type nitride semiconductor layer 5, a transparent electrode layer 6 and a reflective electrode layer 7, and the transparent electrode layer 6 has a thickness T satisfying the following expression (1):

wherein λ is the light-emitting wavelength of the light-emitting element 4, and n is the refractive index of the transparent electrode layer 6.

The present invention provides an adhesive sheet having high film strength and excellent section difference followership and foaming resistance of an adhesive layer, a display with excellent section difference followership and foaming resistance, and a method for producing the same. The adhesive sheet (1) is provided with an adhesive layer (11) for bonding a display constituting member (21) to another display constituting member (22), and the adhesive layer (11) is formed by a UV curing adhesive which has a crosslinked structure formed by (meth) acrylate copolymer (A) and a thermal crosslinking agent (B), a UV-curable component (C), and a photopolymerization initiator (D) with a light absorbance over 0.3 at a wavelength of 380 nm in an acetonitrile solution with concentration 0.1 mass%.

The invention discloses a natural gas heat value calculation method based on natural gas component spectrum analysis. In the prior art, the natural gas is still charged by using volume and the heat values of the natural gases from different gas sources are greatly different. In the method, a measured material is irradiated by using infrared light, the light absorbance of the measured material is measured and the content of the measured component is calculated according to the light absorbance. The volume fraction of the components of a mixed gas in a pipeline is calculated through the concentration of the components measured by infrared spectroscopic analysis by utilizing a Fourier infrared spectrometer to obtain the natural gas heat value, so that a possibility is provided for realizing that the natural gas is charged by using the heat value. According to the invention, the spectroscopic analysis technology is employed and is characterized by high resolution, high sensitivity, high signal-to-noise ratio and quickness, and the system is compact in volume and high in stability.

The invention provides a display medium including: a first electrode; a second electrode; a liquid crystal layer provided between the first electrode and the second electrode; a photoconductive layer provided between the second electrode and the liquid crystal layer, the photoconductive layer absorbing light of a predetermined wavelength used for writing, and thereby exhibiting an electrical characteristic corresponding to the intensity distribution of the light used for writing; a first light absorption layer provided between the liquid crystal layer and the photoconductive layer, the first light absorption layer absorbing light transmitted through the liquid crystal layer; a second light absorption layer provided at the side of the second electrode not facing the photoconductive layer, the second light absorption layer allowing transmission of the light used for writing and having an absorbance of 1 or more with respect to light of any wavelength in a range of from 300 nm to 550 nm.

The invention provides a measuring method for content of metal elements in polymer resin. The measuring method includes the steps of firstly, establishing a standard curve of concentration and light absorbance of different metal elements on an atomic absorption spectrograph; secondly, adding digestion liquid into polymer resin to be measured to obtain mixture A, and digesting the mixture A by a microwave digestion method to obtain acid fluid A; thirdly, heating the acid fluid A to allow residual matter to be a wet salt state, and performing constant volume by deionized water to prepare solution A to be measured; and fourthly, measuring the solution A to be measured by the atomic absorption spectrograph to obtain light absorbance of the metal elements in the solution A to be measured, acquiring concentration Ci of the metal elements of the solution A to be measured according to the standard curve of concentration and light absorbance, and calculating to acquire content of the metal elements in the polymer resin to be measured. The polymer resin is digested by the microwave digestion method, metal is free of loss in treatment process, and accuracy of measurement is increased.

The present invention discloses a mask plate, which comprises a mask plate body, wherein a light transmission region of the mask plate body has a light transmission film prepared from a photoresist, and light absorbance of the light transmission film is gradually increased from the center line to the direction of non-light transmission regions on both sides. According to the present invention, light absorbance of a light transmission film is gradually increased from the center line to the direction of non-light transmission regions on both sides so as to reduce a diffraction effect of the light in the light transmission region toward the direction of the non-light transmission region, the light absorbance of the light transmission film from the center line to the direction of the non-light transmission regions on both sides is a gradual change process, and light on the center region of the light transmission region diffracts toward positions on both sides of the light transmission region, such that intensity of the whole light transmission region light emitting on the photoresist on the surface of the substrate is uniform, widths of both sides of the photoresist remaining on the substrate can be well controlled during exposure development, uniformity of both side edges of the photoresist is good, burrs are less, and control accuracy of line width of the obtained structure is increased. The present invention further provides a preparation method for the mask plate.

The present invention provides a large-capacity preparation flow cell with an optical fiber interface, which comprises a flow cell body, a flange connector, a plurality of adjusting rods, a quartz light column, a light column sealing gasket, a light column sealing pressure plate, a light column adjusting piece, a flat convex lens holder, a flat convex lens, a flat convex lens gasket, an optical fiber adapter, a standard optical fiber connector, an adjusting rod sealing gasket, an adjusting rod sealing pressure plate and a plurality of cell nuts. A detection area is formed between the opposite adjusting rods on the left side and the right side, and the end face of the standard optical fiber connector is arranged at the focal point of the flat convex lens, so that parallel light can be transmitted into the detection area. The present invention has the advantages that the optical path of the large-capacity preparation flow cell can be adjusted conveniently according to the difference of the concentration and light absorbance of materials to be tested, so that the detected values fall into the detection range of a detector. In addition, the flow cell can be arranged away from the detector due to the optical fiber interface, so as to facilitate explosion-proof applications.

An organic solar cell includes a first sub-cell including a first active layer and a second sub-cell including a second active layer, wherein at least one of the first active layer and the second active layer includes at least two types of electron acceptors having different light absorbance from each other.

An optical apparatus and method comprising a light source, an array detector for area imaging and an optical cell assembly. The optical cell assembly comprises a chamber which is arranged to receive a sample of a material including an analyte, a fluid inlet and a fluid outlet coupled to the chamber. A fluid dissolution medium stream passes through the chamber such that the sample can dissolve into the dissolution medium. The chamber is in at least one light path created between the light source and the array detector. The array detector comprises a two dimensional array of detector locations arranged to provide an output signal indicative of the light absorbance of the analyte within the chamber such that the output of the array detector is indicative of the concentration profile of the analyte near the surface of the sample.

Methods and apparatuses for measuring a light absorbance are provided. The method measures light absorbance of at least one detection chamber of a microfluidic device, including the detection chamber and at least one reference chamber. The detection chamber may accommodate a test subject. The method includes detecting a plurality of reference transmitted light intensities for the at least one reference chamber and estimating a value between the plurality of reference transmitted light intensities through nonlinear approximation. The estimated value is then applied to light absorbance measurement of the detection chamber to reduce a light absorbance error of the detection chamber.

Provided is a stacked image sensor. Particularly, provided are a stacked image sensor including a photosensitive element portion having a photo-conductive thin film on an upper portion of a wafer where a peripheral circuit is formed and a method of manufacturing the stacked image sensor. In the stacked image sensor according to the present invention, since a wafer where a circuit is formed and a photosensitive element portion are formed in a stacked structure, a whole size of the image sensor can be reduced, and there is no optical crosstalk due to absorption of incident light to adjacent pixels. In addition, since a photo-conductive element having a high light absorbance is used, a high photo-electric conversion efficiency can be obtained. In addition, in the method of manufacturing a stacked image sensor according to the present invention, since the upper photosensitive element can be formed by using a simple low-temperature process, a production cost can be reduced.

The invention discloses a preparation method and an implementation method of a graphene-based ultra-black extinction coating with excellent visible light absorptivity and infrared absorptivity. The problems that existing black paint is high in substrate selectivity, poor in adhesive force, poor in aging resistance, not ideal in visible-infrared light absorption effect and the like are solved. Graphene is introduced, and the types and dosages of a binder and a cross-linking agent are adjusted, so that the matrix resin shrinks to form nano-scale and micron-scale holes during cross-linking and curing, an excellent light trapping structure can be formed on the outer surface of the coating under the condition that the strength of the matrix is not influenced, the reflectivity is further reduced, and the light absorption performance of the coating is optimized. The extinction coating prepared by the method is simple in coating process, wide in substrate selectivity, high in production efficiency, good in weather resistance and excellent in adhesion properties. The absorption rate of the coating in the wavelength range of 400-2300nm is 98.0%-98.5%, and the coating is suitable for opticalcomponents, baffles, lens hoods, lens cone inner walls, darkrooms and other systems and parts needing stray light elimination.

The invention realtes to a display device and a manufacturing method thereof. The manufacturing method equipped with an organic electroluminescent element in which collective removal of organic layers formed on an auxiliary wiring in high precision is possible, and by this, yield improvement and productivity improvement can be achieved, and provide the display device obtained by this. The lower part electrode 4 is pattern-formed at respective pixels a on a substrate 2. An auxiliary wiring N with a constitution that is provided with a light-absorbing layer 9 composed of a conductive material having a higher light absorbance than that of the lower part electrode 4 is formed between respective pixels a. An organic layer 5 is formed in a state covering the lower part electrode on the substrate at which the lower electrode and the auxiliary wiring N have been formed. Laser beam is converted into heat at the light absorbing layer exposed to the lower part of the organic layer by irradiation of the laser beam from the organic layer side, and the organic layer part on the upper part of the light absorbing layer is selectively removed. The organic layer is made to be pinched between the lower part electrode, and on the light absorbing layer part where the organic layer has been removed, the upper part electrode 6 connected to the auxiliary wiring N is formed on the substrate.