157 results about "Narrow spectrum" patented technology

The present invention relates to characterizing changes in mammalian gastrointestinal microbiota associated with antibiotic treatment and various disease conditions (such as obesity, metabolic syndrome, insulin-deficiency or insulin-resistance related disorders, glucose intolerance, diabetes, non-alcoholic fatty liver, abnormal lipid metabolism, short stature, osteoporosis, and other disorders of bone formation and mineralization, etc.) and related diagnostic and therapeutic methods. Therapeutic methods of the invention involve the use of probiotics, prebiotics, or narrow spectrum antibiotics/anti-bacterial agents that are capable of restoring healthy mammalian bacterial gastrointestinal microbiota.

Binary and Quadrature Feher's Modulation (F-Modulation, or FMOD) Transmitter-Receiver systems and circuits exhibit reduced envelope fluctuation and peak radiation, and increased efficiency. A subclass of these systems has a constant envelope. They advantageously provide lower power operation with improved performance including robust BER performance, and compatibility with both linearly and nonlinearly amplified narrow spectrum, and without disadvantages of conventional BPSK, DBPSK QPSK and pi/4-QPSK. Feher's BPSK (FBPSK) is an improved efficiency transmitter which is compatible with conventional BPSK receivers. FBPSK modems are based on using quadrature structure where Q-channel data is inserted in quadrature with I-channel data for certain applications. The Q-channel data may be “offset” from the I-channel data by an amount selectable between zero and a specified time. Further improvement in the spectrum is attained using correlation between I and Q channels. FBPSK modem is shown to meet the IEEE 802.11 specified spectral direct sequence spread spectrum mask (−30 dB point) for wireless LAN, and leads to an output power gain of 6.5 dB over conventional BPSK modems. The cross-coupled quadrature FMOD structure is also suitable for continuous mode and for burst operated TDMA, FDMA, CDMA, WCDMA and CSMA Frequency Modulation Quadrature AM (QAM), QPSK and offset QPSK, as well as pi/4-shifted QPSK modems/processors. Reduced modulation index Gaussian FSK (GFSK), multilevel FM and cross-coupled Quadrature Amplitude Modulated (QAM) transmitters and combinations of these modulations and corresponding coherent demodulators are disclosed. Controlled rise and fall time descriptions of burst operated systems are included.

A security document with optically excitable dyes for authenticity checking. Dyes are applied to or embedded in the security documents. The dyes are advantageously embedded in a carrier material which in conjunction with the dyes forms a laser-active element. Certain optically excitable dyes are incorporated in a security document in such a way that when the security and/or sensitive document is optically excited, the dyes embedded in the security and/or sensitive document resonate with the material of the securities and secure documents, so that a well-defined narrow spectrum of all excited materials is emitted.

The invention discloses a method for epitaxially growing an InAs/GaSb type-II superlattice narrow-spectrum infrared photoelectric detector material. The method comprises the following steps of: selecting a substrate as a supporting body of an epitaxial layer; epitaxially growing a buffer layer on the substrate; cooling, and epitaxially growing a p-type doped InAs/GaSb type-II superlattice layer on the buffer layer; epitaxially growing an intrinsic InAs/GaSb type-II superlattice absorbing layer on the p-type doped InAs/GaSb type-II superlattice layer; epitaxially growing an n-type doped InAs/GaSb type-II superlattice layer on the intrinsic InAs/GaSb type-II superlattice absorbing layer; and epitaxially growing an n-type doped InAs cover layer on the n-type doped InAs/GaSb type-II superlattice layer to finish the epitaxial growth of the InAs/GaSb type-II superlattice narrow-spectrum infrared photoelectric detector material.

The present invention provides a method of recycling a plastic thereby forming a narrow spectrum of hydrocarbons having from 4 to 14 carbon atoms that can be directly used as gasoline without additional processing or refining. The method includes the step of feeding the plastic, selected from the group of polyethylene, polypropylene, polystyrene, and combinations thereof, into a heated vessel for melting. The method also includes the step of decomposing the plastic at a temperature of from 400° C. to 500° C. in the presence of a metallocene catalyst and a zeolitic catalyst thereby forming the hydrocarbons having from 4 to 14 carbon atoms. The metallocene catalyst includes dichlorobis(2-methylindenyl)zirconium (IV). The zeolitic catalyst includes ammonium Y zeolite and has a pore size of from 1 to 4 Angstroms.

An optical transmitter that reduces the stimulated Brillion scattering occurred within a transmission optical fiber and a method to control the optical transmitter are disclosed. The optical transmitter with a type of the chirp managed laser diode (CML) comprises a laser diode modulated with a high frequency signal and biased with a relatively large bias current and an optical filter. When the modulation signal is stopped, an optical signal with relatively large power and narrow spectrum may enter the transmission fiber, which causes the stimulated Brillouin scattering. In the present optical transmitter, when the modulation signal is absent, an auxiliary signal is superposed on the bias current.

The invention relates to a high-effect laminated solar-energy battery and a relative production, which can improve the utilization of solar energy and the photoelectric conversion efficiency of solar-energy battery, belonging to the solar-energy battery and production technical field. The invention is composed of a top solar-energy battery and a transparent battery of bottom solar-energy battery which are adhered via sealing glue, or the top and bottom share one glass baseboard, wherein the top solar-energy battery is leaded out a couple of electrodes, and the bottom solar-energy battery is leaded out another couple of electrodes, to form a laminated solar-energy battery with four terminal structures. The invention can realize the best match of solar-energy battery, to improve the photoelectric conversion efficiency of solar-energy battery, and improve the quality and property of solar-energy battery. The invention can effectively resolve the problems of single solar-energy battery as narrow spectrum adsorption range and low light adsorption utilization efficiency, to effectively improve the spectrum adsorption of solar-energy battery and improve the photoelectric conversion efficiency, while the photoelectric conversion efficiency can reach 25-30%.

The invention belongs to the technology of ionizing radiation, in particular to an energy spectrum analytical method of X-ray filtering reference radiation. The energy spectrum analytical method of X-ray filtering reference radiation measures X-ray filtering reference radiation of low air kerma rate and narrow-spectrum through an HP Ge energy disperse spectroscopy, finds out a method that energy spectrum analysis of the measured spectrum can be conducted through a backscrolling energy spectrum method, obtains fluence spectrum and characteristic values of a reference radiation field, and compares the fluence spectrum and characteristic values with the recommended value of the fluence spectrum and characteristic values of the national standard, good in conformance, and verifies accuracy and reliability of the established X-ray reference radiation.

The invention discloses a differential pressure sensing method and a sensor thereof. According to the differential pressure sensing method, pressure produced through detection fluid impacts one surface of an elastic membrane (113), meanwhile narrow-spectrum laser irradiates the other surface of the elastic membrane (113), the elastic membrane (113) can deform, the output light intensity of a receiving optical fiber (41) can change after the elastic membrane (113) deforms, and pressure variation caused by the fluid on the elastic membrane (113) is judged by detecting the variation of the output light intensity of the receiving optical fiber (42). By the adoption of the method, the sensor is high in sensing accuracy, reliable in performance, simple in structure, low in volume and mass and low in manufacturing cost.

A high power diode laser system utilizes an external cavity to narrow the spectral width of a high power multimode diode laser to change the output power normally produced by the diode from a broad spectrum to a very narrow spectrum. The power output of the laser system is concentrated over a narrow spectral range which falls within the useable range for particular applications, such as optical pumping of noble gas samples for magnetic resonance imaging. The output of the diode is received by a collimating element which directs the light on a beam path to a diffraction grating which is oriented at an angle to the incident beam. A portion of the beam may be directed from the diffraction grating to provide useable output light, and a portion of the light incident on the grating is directed back to be focused on the diode to provide feedback to cause the diode to preferentially lase at the wavelength of the light that is fed back. A polarization rotation element may be used to orient the polarization of the light passing through it to control the amount of feedback light.

The invention relates to a non-refrigerated infrared imaging sensor based on a super surface. The sensor includes a double-layer non-refrigerated infrared detector; the double-layer non-refrigerated infrared detector includes a semiconductor substrate and a detector body; the detector body includes a first-layer suspended structure and a second-layer suspended structure; the first-layer suspendedstructure is composed of a metal reflecting layer, an insulated medium layer, a metal electrode layer, an electrode protection layer, a first supporting layer, a thermosensitive protection layer and athermosensitive layer; the second-layer suspended structure includes a metamaterial supporting layer and a metamaterial supporting protection layer; a metamaterial structure is arranged on the metamaterial supporting protection layer and made of NiCr or/and Al, and the thickness of the metamaterial structure is within a range from 2 nm to 30 nm; the invention also relates to a preparation methodof the sensor; according to the method, the double-layer non-refrigerated infrared detector without carrying out release on a sacrificial layer is provided, and after the metamaterial structure is prepared on the detector, the release on the sacrificial layer is carried out; the preparation process is simple and compatible with a CMOS process, and the functions of multi-color detection, broadbanddetection, narrow-spectrum detection and the like can be achieved.

The invention discloses a bituminous pavement surface structure 2D test evaluating system and method. The system comprises an image acquiring module, an image processing module, a surface structure line acquiring module, a surface structure line processing module, and an analyzing and computing module. The method comprises the following steps of: 1, making a bituminous mixture test piece; 2, acquiring a profile scanning image of the bituminous mixture test piece; 3, preprocessing the profile scanning image to obtain a profile scanning grey-scale map; 4, acquiring the surface structure line of the profile scanning grey-scale map; 5, performing bad point deletion, anti-confusion filtering, window function addition, and DFT on the surface structure line to obtain the constant-bandwidth narrow spectrum of the surface structure line; and 6, analyzing the power spectrum of the constant-bandwidth narrow spectrum of the surface structure line and computing an evaluation index octave index L<TX, I j> for the bituminous pavement surface structure. The system and the method are high in testing precision, simple in operation, low in cost, and easy to popularize.

An optical transmitter for use in high-density WDM (Wavelength Division Multiplexing) optical transmission system generates an RZ-AMI (Return to Zero—Alternate Mark Inversion) signal which contains not only high reception sensitivity suitable for a high-density WDM optical transmission system, but also a narrow spectrum bandwidth. The transmitter includes a precoder for coding an input binary-data electric signal, a modulation drive amplifier for amplifying the coded signal, a light source for generating an optical carrier signal, a first optical modulator for modulating a phase of the optical carrier signal upon receiving the amplified signal from the amplifier, a second optical modulator for modulating an output signal of the first optical modulator into an RZ (Return to Zero) signal, and an optical filter for filtering an output signal of the second optical modulator to tailor the output signal for a predetermined bandwidth.

An observation apparatus includes an imager, a light source unit, an image processor and a light intensity adjusting section. The imager includes types of elements which generate a first signal when the elements receive light included in a sensitivity region. The light source unit includes light sources to emit narrow spectrum light, wavelengths of the light being different from one another and being set so that at least one of the wavelengths is included in each of the sensitivity regions. The image processor generates display data indicating a color image on the basis of the image data. The light intensity adjusting section separately adjusts respective light intensity of the light sources.

The invention belongs to the technical field of atomic clocks and frequency standards and particularly relates to a single electron atom light clock and a preparation method thereof. In the technical scheme adopted by the invention, transition of a laser frequency band between a ground state and a second excited state of a single electron atom is used as a quantum frequency standard of an optical frequency band and an optical comb is combined to obtain the light clock implemented after the frequency is transferred. In the scheme, a cesium atom is used as an example, the narrow spectrum line width characteristic of the second excited state of the cesium atom can be utilized, and a magnetic sub energy level in an outer magnetic field generated by a coil can be decomposed out for laser frequency stabilization. Temperatures of the magnetic field and an atomic furnace can be controlled to optimize a system to enable the system to be in a good working state. Additionally, due to the housing design of the system, electromagnetic interference of the outside can be shielded. By regulating the current and the temperature of a semiconductor laser and controlling the voltage of a piezoelectric ceramic with a cavity length, the final output frequency of laser is stabilized on a transition spectral line of the cesium atom, which has a wavelength of 459nm from 6S to 7P1/2 or 455nm from 6S to 7P3/2.

The invention relates to a device for inspecting eggs for the presence of blood. The device comprises a light source in order to pass light at a first wavelength which is not selectively absorbed by blood and light at a second wavelength which is selectively absorbed by blood through an egg to be inspected. Furthermore, the device comprises detection means for converting the light transmission through the egg to be inspected for each of the two wavelengths into corresponding signals, each of the said signals being representative of the light transmission at the relevant wavelength. The device also comprises signal-processing means which are transmission associated with the first wavelength and the light transmission associated with the second wavelength based on the signals emanating from the detection means and to emit a decision signal which is representative of the decision whether or not an egg contains blood on the basis of this ratio. According to the invention, the light source comprises one or more identical LED's (Light Emitting Diode) for generating light which passes through the egg. In use the one or more LED's emit light within a certain narrow spectrum, which spectrum comprises both the first and the second wavelength.

The invention discloses a lighting device, which at least comprises a base, wherein the base is provided with a or a plurality of laser diode chips and a or a plurality of lighting diode chips, wherein at least a laser diode and a lighting diode is arranged on the base. The lighting device can have characteristic illuminating of the laser diode when an extremely narrow spectrum frequency bandwidth is needed, and characteristic illuminating of the lighting diode which has better heat dissipating characteristics when the extremely narrow spectrum frequency bandwidth is not needed.