248results about How to "Wide wavelength range" patented technology

Apparatus and methods that utilize tunable elements to provide for selective wavelength tuning of a light beam. The apparatus comprises a first tunable wavelength selection element having a first adjustable free spectral range, a second tunable wavelength selection element having a second adjustable free spectral range, with the first and second tunable wavelength selection elements configured to define a tunable joint transmission peak. The first and second tunable wavelength selection elements respectively define first and second pluralities of tunable transmission peaks, wherein respective ones of each of the first and second plurality of transmission peaks are aligned to obtain a joint transmission peak that may be adjusted by tuning the wavelength selection elements. The free spectral ranges of the wavelength selection elements are configured to enable a Vernier tuning effect.

The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.

A low-noise laser diode module comprises a laser diode for emitting light with a wavelength in the range from UV to IR, a drive circuit for injecting electrical current into said diode, and an automatic power control circuit for monitoring and adjusting laser output power using front-facet photodiode external to the laser assembly and a feedback loop. Said drive circuit produces injection current modulated by an RF signal with variable degrees, depending on the wavelength to be stabilized, the desired spectral bandwidths of the laser output, and / or other applications. Said RF signal can be a sine wave, a distorted sine wave, a rectified sine wave, a non-sine wave, a series of narrow pulses, or repetitive shunt. The present invention encompasses a method for producing stable, broadband, and low-coherent laser. The present invention also encompasses a method for producing stable narrowband or single longitudinal mode laser. The present invention further encompasses a compact light source applicable to DPSS lasers, fiber lasers, optical parametric oscillators, low-speckle laser display systems, and seeders, with or without nonlinear frequency conversion processes.

A graded-index multimode fiber includes a core containing fluorine and a cladding which is provided at an outer periphery of the core, and the fiber has a refractive index profile which satisfies the following Formula (1):n⁡(r)={n1⁡[1-2⁢⁢Δ⁢⁢(ra)α]1 / 2(O≤r≤a)n1⁡(1-2⁢⁢Δ)1 / 2(r>a)(1)where n(r) is a refractive index of the optical fiber at a distance “r” from the center of the core, n1 is a refractive index at the center of the core, Δ is a relative refractive index difference of the center of the core with respect to the cladding, “a” is a core radius, and α is a refractive index profile exponential parameter.

The invention discloses a multi-channel parallel near infrared spectrum imaging system. A multi-wavelength light emitting diode (LED) is applied to finishing emission of near-infrared light. An avalanche photodiode is used for detecting a weak optical signal, the simulating lock-in amplifier technology is used for achieving amplification of the signal, and a near infrared spectrum cerebral function imaging helmet disclosed in Chinese patent application CN200520002784.8 can be used for improving the partial unreasonable design of a self-adaptation head portion. The multi-channel parallel near infrared spectrum imaging system can achieve continuous rapid accurate detection and collection of cerebral blood oxygen signals, overcomes the defect of an existing functional near infrared system, and brings superiority of the near infrared spectrum imaging technology compared with other cerebral function imaging technologies into full play.

The invention provides an image reading apparatus includes a feeder that feeds a sheet, a transfer path on which the sheet fed by the feeder is transferred, a first reading unit that captures a first image on a first face of the sheet from one side of the transfer path to obtain first image data, a second reading unit that captures a second image on a second face of the sheet from the other side of the transfer path to obtain second image data, and a correction unit that substantially equalizes image density of the first image data and that of the second image data in a case where the first image and the second image are captured at a single transfer of the sheet through the transfer path.

The invention provides an image reading apparatus includes a feeder that feeds a sheet, a transfer path on which the sheet fed by the feeder is transferred, a first reading unit that captures a first image on a first face of the sheet from one side of the transfer path to obtain first image data, a second reading unit that captures a second image on a second face of the sheet from the other side of the transfer path to obtain second image data, and a correction unit that substantially equalizes image density of the first image data and that of the second image data in a case where the first image and the second image are captured at a single transfer of the sheet through the transfer path.

The present invention provides an optical component comprising a dielectric layer and a nanorod array; the nanorod array is formed on a surface of the dielectric layer and extends along a lateral direction and a vertical direction. The nanorod array comprises a plurality of nanorods extending along the dielectric layer. The nanorods have a gap between one another, and an angle is defined by two adjacent nanorods. A bump is formed at each of two ends of the nanorod.

A photoelectric converter includes: a lower electrode layer; a compound semiconductor thin film of chalcopyrite structure disposed on the lower electrode layer and having a high-resistivity layer in its surface; a transparent electrode layer disposed on the compound semiconductor thin film; an interlayer insulating layer; a zinc-oxide-based compound semiconductor thin film; and electrodes. With application of a reverse bias voltage between the transparent electrode layer and the lower electrode layer, and application of a bias voltage between the electrodes, the photoelectric converter photoelectrically converts ultraviolet region light. Thus, the photoelectric converter achieves photoelectric conversion of light in a wider region. Such a photoelectric converter and a process for producing the same, and a solid state imaging device to which the photoelectric converter is applied are provided.

The invention relates to a surface-enhanced Raman scattering active substrate and a preparation method thereof. A HAuCl4 solution and a AgNO3 solution are added in a polyvinyl alcohol aqueous solution with a certain mass concentration, then sodium citrate is added to prepare a polyvinyl alcohol / Au-Ag alloy nanoparticle spinning solution after sufficient reaction, and a parallel type electrostatic spinning technology is adopted to obtain the surface-enhanced Raman scattering active substrate with a polyvinyl alcohol / Au-Ag alloy nanoparticle composite nanofiber structure, wherein the content of Au-Ag alloy nanoparticles is 2*10<-4> to 2*10<-2> mol / g, and the molar ratio of Au:Ag is (1:2)-(1:3). As gold-silver alloy nanoparticles can absorb light from blue to green and the plasma resonance wavelength can be controlled and adjusted between silver and gold, the applicable wavelength range of the surface-enhanced Raman scattering active substrate material provided by the invention is wider than that of a gold or silver single-component substrate.

A graded-index multimode fiber includes a core containing fluorine and a cladding which is provided at an outer periphery of the core, and the fiber has a refractive index profile which satisfies the following Formula (1): n⁡(r)={n1⁡[1-2⁢ ⁢Δ⁢ ⁢(ra)α]1 / 2(O≤r≤a)n1⁡(1-2⁢ ⁢Δ)1 / 2(r>a)(1)where n(r) is a refractive index of the optical fiber at a distance “r” from the center of the core, n1 is a refractive index at the center of the core, Δ is a relative refractive index difference of the center of the core with respect to the cladding, “a” is a core radius, and α is a refractive index profile exponential parameter.

A method for evaluation of a multi-component medicine comprising judging the degree of difference of the multi-component medicine to be evaluated from a group of multi-component medicines selected as a reference group by using a Mahalanobis distance obtained by a process comprising the following steps (1) to (8),(1) a step of obtaining fingerprint data of three-dimensional high performance liquid chromatography of the multi-component medicine to be evaluated,(2) a step of combining the fingerprint data obtained in (1) with fingerprint data of three-dimensional high performance liquid chromatography of other multi-component medicines of the same kind forming a reference group,(3) a step of allocating variable axes in the MT method to the number of multi-component medicine and either the elution time or detection wavelength of the fingerprint data of (2) above and regarding a signal strength as a characteristic amount in the MT method,(4) a step of obtaining a unit space from the characteristic amount of (3) using the MT method,(5) a step of obtaining the Mahalanobis distance of all multi-component medicines for each detection wavelength or elution time using the MT method from the unit space obtained in (4),(6) a step of allocating variable axes in the MT method to the number of the multi-component medicine and either the elution time or detection wavelength to which the variable axes are not allocated in the step (3) and regarding the Mahalanobis distance obtained in step (5) as a characteristic amount in the MT method,(7) a step of obtaining a second unit space from the characteristic amount of (6) using the MT method, and(8) a step of obtaining the Mahalanobis distance of the multi-component medicine to be evaluated using the MT method from the second unit space obtained in (7).According to the present invention, because the waveform processing of HPLC peaks is unnecessary, dispersion among data are small, thereby bringing highly reliable results; because the amount of information (the number of data points) is not limited to the number of peaks of a specific component, the amount of information can be freely increased or decreased; in addition, because it is not necessary to judge by combining the value of the content of two or more components, but can be judged using a single numerical value, the degree of difference of the multi-component medicine to be evaluated from a reference group can be simply judged.

Designs of optical devices particularly useful for separating channels signals that are originally multiplexed are disclosed. In accordance with one design, an optical filter configured to reflect a particular channel signal is positioned to receive a multiplexed signal at a small incident angle so as to minimize residuals of other signals in the channel signal. To further increase isolation from the other channel signals, another filter is introduced to transmit only the reflected channel signal, the another filter has a frequency response reciprocal to that of the original optical filter. One of the key advantages, benefits and objects of the designs is to increase channel signals separation efficiency by increasing isolation among separated channel signals.

An all-fiber Doppler lidar wind field detection system comprises a laser emission system, an optical receiving system, a frequency discrimination and optical detection system and a signal processing system, wherein the frequency discrimination and optical detection system is connected with the signal processing system; the laser emission system and the optical receiving system are connected with the frequency discrimination and optical detection system through multi-mode / single-mode converters; the laser emission system emits laser light into the atmosphere; the optical receiving system receives backscattering light of atmospheric molecules and couples the backscattering light into multimode fibers, then, the backscattering light is fed into the signal processing system after entering the frequency discrimination and optical detection system for processing through the multi-mode / single-mode converters, and wind speed information is obtained after the backscattering light is processed. A fiber M-Z interferometer is used as a frequency detector, the wavelength range is wide, the selectivity of a laser light source is high, the ability to resist external interference is high, and spectral resolution and light splitting efficiency are high; in this way, the stability of detection is improved, detection accuracy is high, and the all-fiber Doppler lidar wind field detection system is convenient to use.

The invention discloses a nanometer titanium dioxide photocatalyst responding visible light with high absorbance and a wide wavelength range on the visible light. The photocatalyst is characterized in that a mass ratio of nanometer TiO2 to active carbon is 1:5-15; a mass ratio of metal silver to the nanometer TiO2 is 0.5-2:100; and a mass ratio of metal copper or iron or rhodium or platinum or gold or tin to the nanometer TiO2 is 0-2:100. The method for preparing the photocatalyst comprises the following steps: preparing a titanium ester solution and a soluble metal salt solution to be mixed and evenly stirred; evenly loading TiO2 particles and metal ions onto the surface of the active carbon by a sol-gel method; and carrying out thermal treatment under the protection of inert gases at a temperature of between 300 and 600 DEG C for 2 to 6 hours so as to prepare the metal doped and active carbon loaded anatase type TiO2 photocatalyst. The photocatalyst and the method have a simple process; compared with the prior loading type visible light photocatalyst, the prepared product can sufficiently utilize sunlight, has the absorbance to the visible light reaching about 85 percent and wide wavelength range, can be industrially applied, has the characteristics of energy conservation, environmental protection and the like; meanwhile, due to larger particles of the active carbon, recycle of the photocatalyst is convenient, and treatment cost is reduced.

Oligonucleotide probes containing two labels are provided and are useful in hybridization assays. The probes can also contain a minor groove binding group.

A wavelength measurement or monitoring system provides a tunable Fabry-Perot optical filter. At least one known light source is used to calibrate and correlate separate wavelength bands scanned by the tunable Fabry-Perot optical filter. At least one wavelength reference is utilized to calibrate at least one wavelength band of the tunable Fabry-Perot optical filter. The wavelength reference is transferred to a wavelength band that is identified for measurement when the wavelength reference is not in a wavelength band identified for measurement by the tunable Fabry-Perot optical filter. An unknown optical signal is scanned through the tunable Fabry-Perot optical filter. The wavelengths in the unknown optical signal are specified.

Provided is a resin composition for light scattering layer for use in forming a light scattering layer of an organic EL device, including: a binder composition including at least one type of resin (A); and light scattering particles (B). In a resin composition for light scattering layer of the invention, the light scattering particles (B) have an average particle diameter of 200 nm to 500 nm in the resin composition and have a content of 20 vol % or less of particles with a particle diameter of 600 nm or more with respect to a total amount of the light scattering particles (B); and a refractive index difference between the binder composition and the light scattering particles (B) is 0.1 or more.

Multimode optical fiber local area networks, both intrabuilding and interbuilding, are optimized to take advantage of the wide wavelength operating range offered by co-pending patent application Ser. No. 10 / 408,076 “Enhanced Multimode Fiber”—a fiber provided both with: longitudinally spaced perturbations for inducing mode coupling and thereby lessening mode dispersion; and with a radial discontinuity for discouraging conversion of bound-to-cladding-modes and thereby lessening added loss previously associated with induced mode coupling.

The invention relates to a coating composition consisting of an oxide compound. The invention also relates to a method for producing a coating composition consisting of an oxide compound and to a method for coating substrates composed of metal, semiconductor, alloy, ceramic, quartz, glass or glass-type materials with coating compositions of this type. The invention further relates to the use of a coating composition according to the invention for coating metal, semiconductor, alloy, ceramic, quartz, glass and / or glass-type substrates.

The invention provides a conducting film integrated structure, which comprises a base material, an anti-glare layer, an anti-Newton ring layer, a hard layer and a transparent conducting film. The anti-glare layer and the anti-Newton ring layer are arranged on the two opposite sides of the base material respectively; and the hard layer and the transparent conducting film are arranged on the anti-glare layer and the anti-Newton ring layer respectively. The conducting film integrated structure provided by the invention has the advantages of high conductivity, wide wavelength range and high visible light transmission, can prevent the Newton ring phenomenon and has an uneasily damaged structure and a stable environment.

A silicate luminescent material excitable by an excitation light source having emissions in UV to blue light region, a process for producing the same, and a white light emitting device. The luminescent material has an emission spectrum with at least two peaks in a range of from 370 to 760 nm, and has a general chemical composition formula of aAO.bA′O.cSiO2:xEu.yLn.zM.δN, wherein A is selected from the group consisting of Sr, Ca, Ba, and combinations thereof; A′ is selected from the group consisting of Mg, Zn, and combinations thereof; Ln is selected from the group consisting of Nd, Dy, Ho, Tm, La, Ce, Er, Pr, Bi, Sm, Sn, Y, Lu, Ga, Sb, Tb, Mn, Pb and combinations thereof; M is one or a combination of halogen ions; N is selected from the group consisting of Li+, Na+, K+, Ag+, and combinations thereof; and a, b, c, x, y, z, and δ are molar coefficients.

The invention relates to angle-limiting optical reflectors and optical dispersive devices such as optical spectrum analyzers using the same. The reflector has two reflective surfaces arranged in a two-dimensional corner reflector configuration for reflecting incident light back with a shift, and includes two prisms having a gap therebetween that is tilted to reflect unwanted light and transmit wanted light. A two-pass optical spectrum analyzer utilizes the reflector to block unwanted multi-pass modes that may otherwise exist and degrade the wavelength selectivity of the device.

The present invention provides a wavelength-selective diffraction element, configured such that light having a plurality of wavelengths are incident thereon as incident light, which is provided with: a transparent substrate; a concavo-convex part, formed on the transparent substrate such that concave portions and convex portions are cyclically extended in one direction, and comprised of a first material which is optically isotropic; and a filling part, filling at least the concave portions and comprised of a second material which is optically isotropic. The first material and the second material have no absorbance with respect to the wavelengths of the incident light. The first material and the second material have an identical refractive index with respect to light having a first wavelength which is at least one of the wavelengths of the incident light. The first material and the second material have different refractive indices with respect to light having a second wavelength which is at least one of the wavelengths of the incident light and different from the first wavelength.

The hologram recording sheet according to the invention is made up of a base film and hologram sensitive materials sensitive to different wavelength regions formed therein in a desired pattern, or a film and at least two hologram recording sensitive materials sensitive to different wavelength regions laminated on the film with a transparent plastic spacer layer located therebetween, thereby enabling the required diffraction light wavelengths to be recorded on the required sites without producing unnecessary interference fringes. At least two hologram recording sensitive materials sensitive to different wavelength regions are formed on different sites on a film in dotted or striped configuration, the size of which is up to 200 mm or at least twice as large as the thickness of the sensitive material layers, thereby enabling regions diffracting light of different wavelengths to be formed in the form of independent sets of interference fringes.

The invention provides a method for producing an ultrathin quartz crystal phase retardation plate with high yield and stable quality. The method sequentially comprises the following working procedures of checking raw materials, designing the shape of a crystal, orientating an angle, designing a cutting form of a crystal plate, cutting a plurality of lines, processing the shape of the crystal plate, and grinding, polishing, washing, plating, gluing, forming, detecting and packaging the crystal plate, and putting into storage. The key point is that: in the polishing working procedure, the crystal plate to be polished is glued on a substrate, and then is polished; and in the washing working procedure, the substrate is separated from the crystal plate, and then the crystal plate is washed. The single quartz crystal to be polished is glued on the substrate, so that the mechanical strength of the single quartz crystal to be polished is improved; and then the single quartz crystal to be polished is polished, so that the crystal plate has extremely high parallelism, high transmittance, high light loss resistance threshold value and high mechanical performance, is particularly stable in use occasions with a large temperature difference range, has a wide wavelength range, permits large-angle incidence (about 20 degrees), and can be applied to the use occasions with high loss threshold value (more than 1 GW / cm<2>).

An optical filter includes: a first variable wavelength bandpass filter that can extract light of a first wavelength band (400 to 460 nm), the first wavelength band having a first spectral band having a central wavelength equal to a first wavelength in the first wavelength band and a second spectral band having a central wavelength equal to a second wavelength in the first wavelength band; and a second variable wavelength bandpass filter that can extract light of a second wavelength band (480 to 540 nm) adjacent to the first wavelength band, the second wavelength band having a third spectral band having a central wavelength equal to a third wavelength in the second wavelength band and a fourth spectral band having a central wavelength equal to a fourth wavelength in the second wavelength band.