168 results about "Transmittance spectra" patented technology

Within a method of making an optical interference filter, sample spectra and measurements of a predetermined characteristic associated with respective spectra are provided. Upon selection of an initial number of filter layers and a thickness for each layer, a transmission spectrum is determined. Each sample spectrum is applied to a regression formula that relates interaction of light with the transmission spectrum to a regression value. A comparison relationship between the calculated regression values and the sample measurements is defined and optimized, wherein thickness of each layer is an optimization variable.

Hybrid dual layer filter can be employed can be employed as filters. A multispectral imager comprises a two layer filter array monolithically integrated onto detector array, a top layer of pigment based filter and a lower layer of plasmonic nano-optic filter to make a low cost and narrow bandwidth filter without side leaking or side peaks. Multispectral imager comprises a microlens array, a mosaic patterned optical filter array underlying the microlens array and including a two-dimensional repetition of a unit mosaic pattern, and a pixelated detector array underlying the mosaic patterned optical filter array. The unit mosaic pattern comprises an array of composite filter elements having different peaks in a respective transmittance spectrum. Each composite filter element comprises a pigment based filter portion and a plasmonic nano-optic filter portion.

Optical devices with versatile spectral attributes are provided that are implemented with one or more modulated and homogeneous layers to realize leaky-mode resonance operation and corresponding versatile spectral-band design. The first and / or higher multiple evanescent diffraction orders are applied to excite one or more leaky modes. The one- or two-dimensional periodic structure, fashioned by proper distribution of materials within each period, can have a resulting symmetric or asymmetric profile to permit a broadened variety of resonant leaky-mode devices to be realized. Thus, the attributes of the optical device permit, among other things, adjacent, distinct resonance frequencies or wavelengths to be produced, convenient shaping of the reflection and transmission spectra for such optical device to be accomplished, and the wavelength resonance locations to be precisely controlled so as to affect the extent to which the leaky modes interact with each other. Further, the profile asymmetry allows for the precise spectral spacing of interactive leaky modes so as to provide greater flexibility in optical device design.

A color display is provided that includes a light emitting sub-pixel and a filter layer including first and second color filter materials. The first color filter material is adapted to reduce transmittance of visible light outside a first transmittance spectrum corresponding to a first color, and the second color filter material is adapted to reduce transmittance of visible light outside a second transmittance spectrum corresponding to a second color. The second color is different than the first color. A color display having a white-balanced pixel is provided. A method of white-balancing a light emitting device is provided. A method of reducing unwanted light output due to electrical leakage is provided to fall below a pre-determined threshold. An opaque layer may be interposed between the sub-pixels and / or may frame illuminated areas of sub-pixels, and may be a combination of red, green, and / or a blue filter material.

A display device and a method of manufacturing the same are provided. The display device includes an illuminate unit and a color filter. The illuminate unit has a light-emitting chip and a plurality of quantum dot phosphors for generating a color light which has an optical spectrum including the first blue peak wavelength, a first green peak wavelength, and a first red peak wavelength. The color filter is disposed in the light path of the color light, wherein the color filter has a transmittance spectrum having a second blue peak wavelength, a second green peak wavelength, and a second red peak wavelength. The first blue peak wavelength, the first green peak wavelength, and the first red peak wavelength respectively match the second blue peak wavelength, the second green peak wavelength, and the second red peak wavelength in order to enhance the color performance of the display device.

An anti-glare film with no color alone is provided, and it is applied to a display by combining with a back light or liquid crystal cell, so that unnecessary coloring is avoided and superior coloring development properties are exhibited. In an anti-glare film having a transparent substrate and an anti-glare layer provided on at least one surface of the transparent substrate, the anti-glare layer is formed by transparent resin which disperses at least two kinds of resin fine particles, and when a layer is formed by transparent resin which disperses each kind of the resin fine particles alone and light transmittance spectrum in a visible light region of the layer is measured, each of the light transmittance spectra is different.

A SWIR hyperspectral imaging filter has serial stages along an optical signal path with angularly distributed birefringent retarders and polarizers. The retarders can include active retarders such as tunable liquid crystal birefringent elements, passive retarders such as fixed retarders, and / or combinations thereof. Distinctly different periodic transmission spectra are provided by different filter stages, each having multiple retarders, in particular with some stages having broad bandpass peaks at wide spectral spacing and other stages have very narrow closely spaced peaks. The respective spectra include at least one tunably selectable band at which the transmission spectra of the filter stages coincide, whereby the salutary narrow bandpass and wide spectral spacing ranges of different stages apply together, resulting in a high finesse wavelength filter suitable for spectral imaging. The filter may be configured to provide faster switching speed and increased angle of acceptance and may operate in the rage of approximately 850-1700 nm.

There is provided a near-infrared cut filter which has a visible light transmitting property and a near-infrared shielding property both at high levels by that its transmission spectrum has a steep inclination in the vicinity of the boundary between the visible light and the near-infrared, and which can also be sufficiently reduced in size and thickness. The near-infrared cut filter has a near-infrared absorbing layer which contains a near-infrared absorbing dye containing at least one dye in which a condensed ring structure containing at least a benzene ring and a ring having nitrogen atom is bonded to both sides of a squarylium skeleton and which have a carboxylic acid amide structure at a second position of the benzene ring (where the carboxylic acid has a substituent having 5 to 25 having one or more branches), and a transparent resin with a refractive index of 1.45 or more.

The present invention is embodied in an eyewear lens with at least two controlled, limited visible light blocking filters that attenuate its transmittance spectrum. More specifically, in the present invention, the eyewear lens attenuates limited amounts of light in at least two visible wavelength regions via controlled, limited blocking filters, wherein the overall luminous transmittance is at least 75%. The at least two controlled, limited blocking filters have their peak blocking wavelengths in the region of 410-500 nm and 530-620 nm, respectively. In a preferred embodiment, the minimum transmittance that occurs within the 410-500 nm region is ≧55% and the minimum transmittance that occurs within the 530-620 nm region is ≧65%. In another preferred embodiment, the eyewear lens comprises an anti-reflective coating on its inner surface (the eye-side of the lens).

The present invention is embodied in an eyewear lens with at least two controlled, limited visible light blocking filters that attenuate its transmittance spectrum. More specifically, in the present invention, the eyewear lens attenuates limited amounts of light in at least two visible wavelength regions via controlled, limited blocking filters, wherein the overall luminous transmittance is at least 75%. The at least two controlled, limited blocking filters have their peak blocking wavelengths in the region of 410-500 nm and 530-620 nm, respectively. In a preferred embodiment, the minimum transmittance that occurs within the 410-500 nm region is ≧55% and the minimum transmittance that occurs within the 530-620 nm region is ≧65%. In another preferred embodiment, the eyewear lens comprises an anti-reflective coating on its inner surface (the eye-side of the lens).

A SWIR hyperspectral imaging filter has serial stages along an optical signal path with angularly distributed birefringent retarders and polarizers. The retarders can include active retarders such as tunable liquid crystal birefringent elements, passive retarders such as fixed retarders, and / or combinations thereof. Distinctly different periodic transmission spectra are provided by different filter stages, each having multiple retarders, in particular with some stages having broad bandpass peaks at wide spectral spacing and other stages have very narrow closely spaced peaks. The respective spectra include at least one tunably selectable band at which the transmission spectra of the filter stages coincide, whereby the salutary narrow bandpass and wide spectral spacing ranges of different stages apply together, resulting in a high finesse wavelength filter suitable for spectral imaging. The filter may be configured to provide faster switching speed and increased angle of acceptance and may operate in the rage of approximately 850-1700 nm.

The invention discloses a color screen that contains plural pixels, each of which includes red, green, and blue sub-pixels. The sub-pixels contain nm particles that could control the transmitted spectrum range of each sub-pixel. The diameter of the particle is 1x10-9-1x10-7meter. It could be metal, semiconductor, or semiconductor compound. The particle would improve the thermal endurance, light transmission rate and contrast of color screen.

The invention discloses a tera-hertz photoelectric characteristic test system capable of realizing multiple test functions on photoelectric characteristics and the like of Fourier spectra, transmittance spectra, reflection spectra and tera-hertz electronic devices by combination of various customized light sources and detectors, light path components selected by a user, and addition of peripheral auxiliary equipment. The tera-hertz photoelectric characteristic test system has the advantages of high signal-to-noise ratio, high resolution, strong expandability, low cost and the like, and can be widely suitable for tera-hertz technical research, new material research, environmental detection and biomedical analysis. In the tera-hertz photoelectric characteristic test system, the light paths, circuits and control of the spectra and photoelectric response test system are subjected to design optimization and systematic integration; compact and reasonable optical, mechanical and vacuum cavity structures are designed; computer controlled accurate mechanical scanning and data acquisition are adopted; and finally the aim of testing and analyzing tera-hertz photoelectric characteristics of materials and core devices such as tera-hertz light sources and detectors by using combination of various light sources and detectors can be fulfilled.

The invention discloses a temperature sensing method and device based on a double-core optical fiber. The existing optical fiber sensing technology has the disadvantages of small temperature measuring range, high demodulation cost and the like. The device disclosed by the invention is characterized in that the output port of a broadband light source is in optical fiber connection with the input port of a single-mode optical fiber section; the output port of the single-mode optical fiber section is connected with the input port of a double-core optical fiber; the output port of the double-coreoptical fiber is connected with the input port of another single-mode optical fiber section; and the output port of the single-mode optical fiber is in optical fiber connection with the input port ofan optical spectrum analyzer. The method disclosed by the invention is implemented by placing the double-core optical fiber in a measurement environment, and determining the temperature exerted on the double-core optical fiber by measuring the wavelength shift of transmittance spectra through the optical spectrum analyzer. The invention avoids electromagnetic interference, can realize remote sensing, and has the advantages of low price, compact structure, large measurement range and the like.

The invention relates to an electrolyte measurement method and an electrolyte measurement device for a vanadium redox flow battery. The electrolyte measurement method comprises the following steps of: measuring the absorption or transmission spectra of a plurality of groups of electrolyte samples with known configuration parameters under the irradiation of a set light waveband, recording the absorption or transmission spectra of the groups of electrolyte samples, and establishing a standard spectral database; in the light waveband, measuring the absorption or transmission spectrum of an electrolyte to be measured; finding out a spectrum closest to the measured spectrum from the standard spectral database; and determining configuration parameters corresponding to the closest spectrum to be measured parameters of the electrolyte to be measured. With the adoption of the electrolyte measurement method and the electrolyte measurement device for the vanadium redox flow battery, the concentrations of vanadium ions of various valences in the electrolyte of the vanadium battery can be effectively measured in an on-line manner, the measurement manner is simple, and the speed is fast.

A device and a method for measuring the micro-zone spectrum of a phase-transformation film are provided. The device comprises a light source, a light diaphragm, a light chopper, a second dichroic mirror, a third dichroic mirror, an object lens, an imaging lens, a first lens, a first spectrometer, a first photoelectric detector, a phase-lock amplifier, a second photoelectric detector, a second spectrometer, a second lens, a third lens, an acousto-optic device, a fourth lens, an expander, a laser and a computer. The device can detect the micro-domain transmission spectrum and reflection spectrum of a sample to be tested before and after the laser-induced phase transformation under different laser excitation conditions including different laser power, pulse widths, repetition frequencies and action times, and can be applied in evaluating the micro-domain optical response characteristic and the photo-thermal stability of the phase-change film.

A color display device particularly adapted for use in flat panel applications provides a bright picture with high saturation and excellent color reproduction. The color display device includes a light shutter mechanism which controls the amount of light passing therethrough. Color filters of different colors are disposed adjacent to the light shutter mechanism and include a plurality of color elements. Each color filter has a peak at the transmittance spectrum thereof. A light source illuminates the light shutter mechanism with the light source having peaks in a luminance spectrum adjusted to correspond to the peaks of the transmittance spectrum of each color filter.

The present invention relates to a graphene coated tilted fiber grating-based liquid refractive index sensor, the surface of a tilted fiber grating gate region is coated with graphene, by change of the evanescent field distribution and transmission spectral characteristics, a surrounding liquid environment refractive index sensing sensitive area can be enlarged, and the sensitive area moves toward a low refractive index region. When the external environmental parameters (such as molecular concentration, solution refractive index and the like) change to cause graphene complex dielectric constant change so as to cause consequent changes of the effective refractive index of the fiber cladding to cause cladding mode resonance wavelength shifts and coupling strength changes of a tilted fiber grating. By extracting and analyzing of cladding mode resonance wavelength and coupling strength and cladding mode upper and lower enveloping normalized area and other spectral feature amounts, and the external environment liquid refractive index change values can be obtained. Ultimately, the liquid refractive index sensor which has high sensitivity in a low refractive index region and is free of ambient temperature influence can be achieved.

The invention provides a terahertz metasurface biosensor based on Fano resonance, and a preparation method thereof. An ultrathin flexible polyimide film is used as a substrate of the sensor, and a periodically arranged metal asymmetric split ring structure is prepared on the upper surface of the sensor. When a line-bias terahertz wave of which the electric field vibration direction is parallel tothe structure opening direction is vertically incident, the Fano resonance effect can be excited, and a sharp asymmetric transmission spectrum line type is generated. Based on the metasurface design of Fano resonance, the ultrathin polyimide with low dielectric constant and low loss is used as the substrate, so that the detection sensitivity can be further improved, and the trace detection is realized. The terahertz metasurface biosensor has the advantages of low preparation cost, good ductility, small size, simple and convenient measurement and the like, and can be widely applied to terahertzwave spectrum biosensing.

The invention discloses a transmission spectrum non-destructive quantitative evaluation method of apple watercore, and belongs to the technical field of rapid evaluation of food quality. The transmission spectrum non-destructive quantitative evaluation method disclosed by the invention comprises the following steps: non-destructively obtaining entire optical information in an apple by using an near-infrared transmission spectrum collection system, collecting an image of a equatorial profile of the apple by using a camera, dividing the image by using an encirclement and suppression algorithm, calculating a watercore area and a sectional area of the apple, using the ratio of the area of a watercore section on a cross section to the area of the entire section as a quantitative prediction index, establishing a transmission spectrum non-destructive quantitative evaluation model of the apple watercore by using a multielement correction method after preprocessing an obtained near-infrared transmission spectrum, so as to achieve the non-destructive quantitative prediction of the apple watercore. According to the transmission spectrum non-destructive quantitative evaluation method disclosedby the invention, the degree of the apple watercore is quantitatively predicted by using the transmission spectrum technology, thereby avoiding the disadvantages of destructive sampling of a sectionvisualization method, and solving the technical problems of low recognition rate and blurred boundary of the watercore.

A liquid sample is dropped onto the upper surface of a transparent and cylindrical light-transmitting body (22), and the liquid sample is maintained as a droplet by the surface tension. From above the liquid sample, a transparent cover plate (25) is lowered down to the position where the lower surface thereof touches a spacer (23) in order that the liquid sample is held in the small gap formed between the upper surface of the light-transmitting body (22) and the lower surface of the transparent cover plate (25). A measurement light is provided into the liquid sample held in this manner from immediately above it, and passes through the liquid sample. The transmitted light emitted downwards through the light-transmitting body (22) is introduced into a spectro-detecting unit to be spectro-measured. The measurement optical path length can be adjusted by the height of the spacer (23). This enables an easy transmission spectro-measurement of an extremely small amount of liquid sample.

There is provided a near-infrared cut filter which has a visible light transmitting property and a near-infrared shielding property both at high levels by that its transmission spectrum has a steep inclination in the vicinity of the boundary between the visible light and the near-infrared, and which can also be sufficiently reduced in size and thickness. The near-infrared cut filter has a near-infrared absorbing layer which contains a near-infrared absorbing dye containing at least one dye in which a condensed ring structure containing at least a benzene ring and a ring having nitrogen atom is bonded to both sides of a squarylium skeleton and which have a carboxylic acid amide structure at a second position of the benzene ring (where the carboxylic acid has a substituent having 5 to 25 having one or more branches), and a transparent resin with a refractive index of 1.45 or more.

The invention relates to the technical field of optical fiber magnetic field sensor, and specifically discloses a vector magnetic field sensor based on side-polished fiber surface plasmon resonance and a manufacturing and detection method thereof. The vector magnetic field sensor comprises a side-polished fiber, a metal film plated on a polishing zone, a magnetic fluid, a light source, and a spectrometer for detecting a transmission spectrum. The polished fiber is made by polishing a part of the cladding and the core of an optical fiber, and is provided with a glass capillary and an optical UVglue. The magnetic fluid is wrapped in seal around the polished fiber via the glass capillary and the optical UV glue. The invention utilizes the surface plasmon resonance (SPR) effect to form a resonance trough (the lowest transmitted light intensity) in the transmission spectrum. In the different magnetic field strengths or magnetic field directions, the refractive index of the magnetic fluid above the metal film is different, which results in the difference of the SPR resonance trough position. The sensing characteristics of the sensor on the direction and intensity of the magnetic field can be calibrated by recording the drift of the resonance spectrum.

The invention relates to a device and a method for automatic surface scanning and measuring of a transmitted spectrum of an optical element. The device comprises a light source, a light diaphragm, a first convergent mirror, a monocolor system, a collimating lens assembly, a second half-reflection pellicle mirror, a reference path, a measuring light path, a third half-reflection pellicle mirror, a second convergent mirror, a sample to be tested, a signal receiving system and a computer. The device and the method are characterized in that the measuring light path measures the horizontally-placed sample to be tested; and the computer is provided with control software, and is connected with a first half-reflection pellicle mirror, the second half-reflection pellicle mirror, the third half-reflection pellicle mirror, the monocolor system, a two-dimensional electric translational platform and the signal receiving system respectively through signal wires. The method realizes the transmitted spectrum measurement of the optical element, can measure the optical element with the maximum dimension of 400 mm x 600 mm, and realizes the automatic surface scanning and measuring of the optical element through the control of the control software of the computer.

The invention discloses a display panel and a manufacturing method therefor, and a display apparatus. The display panel comprises multiple light emitting layers and filtering patterns corresponding to the light emitting layers, wherein the filtering patterns are positioned above the corresponding light emitting layers; the filtering patterns have special transmittance spectra; and the filtering patterns are used for filtering light rays corresponding to spectra except the special transmittance spectra, and transmitting the light rays corresponding to the special transmittance spectra. According to the technical scheme of the display panel and the manufacturing method therefor, and the display apparatus, the filtering patterns are positioned in the light output direction of the corresponding light emitting layers; the filtering patterns have the special transmittance spectra; and the filtering patterns are used for filtering the light rays corresponding to the spectra except the special transmittance spectra, and transmitting the light rays corresponding to the special transmittance spectra; partial light rays are filtered by the filtering patterns, so that the light rays transmitting the filtering patterns are reduced; and consequently, the reflectivity of the ambient light irradiated to the display panel is lowered, so that the contrast ratio of the display panel is further improved.

The invention relates to a biological aerosol water-content determination based on a near infrared spectroscopy and a classification method thereof. The method comprises using an open FTIR atmospheric transmission spectrum determination system for collecting and calculating near-infrared transmittance spectra of the biological aerosol to be detected; using an optical particle counter for determining an average particle size of biological particles in the biological aerosol to be detected; inversely calculating a real part of an infrared complex refractive index of the biological particles in the biological aerosol according to the near-infrared transmittance spectra of the biological aerosol and the average particle size of the biological particles in the biological aerosol; inversely calculating the water content of the biological particles in the biological aerosol according to the infrared complex refractive index of the biological particles in the biological aerosol; and classifying the to-be-detected biological aerosol according to water-content differences of different types of biological particles. An online identification of the biological aerosol can be realized by employing concise experiment steps, thereby overcoming problems of difficult implement and poor real time existing in present identification methods of the biological aerosol.

The invention provides an inter-fiber-cable Mach-Zehnder interferometer of writing linear waveguide based on femtosecond laser. The inter-fiber-cable Mach-Zehnder interferometer of writing linear waveguide based on femtosecond laser includes a broadband light source, a sensing head and a spectrum analyzer, wherein the sensing head is formed through writing of a linear waveguide in a fused single-mode-coreless-single-mode fiber through the femtosecond laser. The inter-fiber-cable Mach-Zehnder interferometer of writing linear waveguide based on femtosecond laser is characterized in that the femtosecond laser writes the linear waveguide in the fused single-mode-coreless-single-mode fiber, wherein the linear waveguide connects the fiber cores of the single-mode fibers at both ends of the coreless fiber; after completion of writing of the linear waveguide, one part of the light of the first section of single-mode fiber core is introduced out by the linear waveguide to penetrate the corelessfiber and transmit to the second section of single-mode fiber core, and one part of the light closely attaches to the linear guide so as to be transmitted to the next single-mode fiber core; and thelight of the broadband light source is transmitted to the spectrum analyzer through the sensing head, thus forming a Mach-Zehnder interferometer to measure the wavelength drift distance of the transmitted light spectral characteristic peak so as to calculate the values of the measured environmental parameters. The inter-fiber-cable Mach-Zehnder interferometer of writing linear waveguide based on femtosecond laser has the advantages of being firm in the apparatus, being low in cost, being small in volume, being high in sensitivity and the like, and can be used for high temperature and flexuralmeasurement.

A seed automatic identification and sorting device based on near-infrared diffuse transmittance spectra includes a feed hopper; a seed counter mounted below the feed hopper; a sample stage having the front end directly connected with an outlet of the seed counter; a light source located above the sample stage; a near-infrared spectrometer located below the sample stage; a near-infrared spectroscopic analysis system connection with the near-infrared spectrometer; a plurality of collecting containers located below the tail end of the sample stage; and a mechanical arm located above the plurality of collecting containers. The seed automatic identification and sorting device overcomes the detect that a quantitative analysis technology needs to know the certain chemical composition and content of seeds in advance, and solves the problem of a positional effect of diffuse reflection spectroscopic analysis of single-grain solid seeds, and has the advantages of automatic and rapid identification and sorting of the single-grain seeds.

A SWIR hyperspectral imaging filter has serial stages along an optical signal path with angularly distributed birefringent retarders and polarizers. The retarders can include active retarders such as tunable liquid crystal birefringent elements, passive retarders such as fixed retarders, and / or combinations thereof. Distinctly different periodic transmission spectra are provided by different filter stages, each having multiple retarders, in particular with some stages having broad bandpass peaks at wide spectral spacing and other stages have very narrow closely spaced peaks. The respective spectra include at least one tunably selectable band at which the transmission spectra of the filter stages coincide, whereby the salutary narrow bandpass and wide spectral spacing ranges of different stages apply together, resulting in a high finesse wavelength filter suitable for spectral imaging. The filter may be configured to provide faster switching speed and increased angle of acceptance and may operate in the rage of approximately 850-1700 nm.