859results about How to "Increase luminous flux" patented technology

A color projection display device may include SLMs or other panels. One embodiment includes a device for displaying a color image including first and second sequences of temporally-integrateable primary color image components, the device also includes first (209) and second (206) SLM panels (604, 606), first and second driving circuitry, and first through fourth polarizing beam spitters.

The invention provides a substrate-free LED filament and a manufacturing method thereof, and a substrate-free LED filament lamp. The filament comprises at least a string of LED chips with same or different illuminant colors, electric lead-out wires, and electric connecting wires arranged between the chips and between the chips and the electric lead-out wires, welding terminals of the chips, the electric connecting wires, and the electric lead-out wires are coated by first luminescent powder layers to form an initial substrate-free LED filament, the other side of the initial substrate-free LED filament is coated by a second luminescent powder layer to form the substrate-free LED filament, and the substrate-free LED filament can be adhered on the external surface of a transparent high-heat-conductivity tube via transparent adhesive tapes or luminescent powder glue to form a cylindrical substrate-free LED filament light source used for manufacturing a high-power LED filament lamp. The substrate-free LED filament lamp comprises at least a bulb shell sealed in a vacuum manner and inflated with heat radiation protection gas, at least one substrate-free LED filament light source is arranged in each bulb shell, and the substrate-free LED filament light source comprises the initial substrate-free LED filament, the substrate-free LED filament or the cylindrical substrate-free LED filament light source; an LED drive, a drive shell, and an electric connector etc. and used for illumination.

The invention discloses a liquid crystal television backlight control system and a method thereof, in which the backlight control system mainly comprises a video signal analyzing unit, a region data correcting unit, a region backlight signal control unit and an average illumination adjusting unit. The backlight control method comprises the following steps: performing statistics and analysis for the video signal by regions; correcting the video signal in individual backlight regions according to the analyzed result; and generating the backlight control signal for controlling the light emitting source at each region independently according to the analyzed result and performing dynamical illumination control for each light emitting source independently. The liquid crystal television backlight control method of the invention controls independently the illumination of each light emitting source according to the grayscale level distribution conditions of video signal at individual backlight regions, thus performing dynamical control on the backlight illumination by regions, saving power consumption, enhancing contrast, and improving observational comfort.

A multispectral photodetector array includes a two-dimensional array of photodetectors, either photodiodes or photoconductors, are coupled to a read out integrated circuit. The integrated circuit collects electrical signals from individual pixels of the array. Such an array differs from a conventional array in that each row or group of rows in the array has a distinct spectral response.

The invention discloses a local aluminum back surface field solar battery with two diaphanous faces. The aluminum back surface field solar battery comprises a silicon substrate, an emitting electrode, a front antireflection passive film, a front electrode, a back passive film, a back surface field and a back electrode, wherein the emitting electrode, the front antireflection passive film and the front electrode are arranged on the front face of the silicon substrate, and the back passive film, the back surface field and the back electrode are arranged on the back face of the silicon substrate. The back surface field is a local aluminum back surface field, a hole or a groove is formed in the back passive film, the area where the hole or the groove is formed is covered with linear aluminum paste, partial back passive film is reserved not to be covered with the aluminum paste, and the local aluminum back surface field is formed in the area where the hole or the groove is formed after sintering. The local aluminum back surface field is communicated with the back electrode. The back passive layer (film) of the solar battery is not completely covered with the aluminum paste, the battery can absorb part of incident light or scattered light on the back, the current of the battery and the current of components are increased, and therefore the photoelectric conversion efficiency of the battery and that of the components are improved. The invention further discloses a preparation method for the local aluminum back surface field solar battery with the two diaphanous faces.

The invention relates to a two-dimensional compression ghost imaging system based on coincidence measurement. The two-dimensional compression ghost imaging system comprises a laser, rotating frosted glass, an object, a spatial light modulator, a first set of convergent optical absorption lens, a second set of convergent optical absorption lens, a first point detector, a second point detector, a coincidence measurement circuit and an algorithm module, wherein laser emitted by the laser irradiates the frosted glass to produce pseudo calorescence which is divided into an object arm optical path and a reference arm optical path; on the object arm optical path, an optical field of the pseudo calorescence is spread to the object, and the total light intensity is collected through the first set of convergent optical absorption lens and the first point detector; on the reference arm optical path, the optical field of the pseudo calorescence is spread to the spatial light modulator, and after modulation, the total light intensity is collected through the second set of convergent optical absorption lens and the second point detector; the coincidence measurement circuit is used for carrying out coincidence measurement on the total light intensity of the object arm optical path and the reference arm optical path and outputting coincidence measurement values, and the algorithm module is used for reconstructing the distribution of spatial correlation coefficients according to a measurement matrix and the measurement values by applying a compression perception algorithm.

An apparatus and method for non-invasive determination of attributes of human tissue by quantitative infrared spectroscopy to clinically relevant levels of precision and accuracy. The system includes subsystems optimized to contend with the complexities of the tissue spectrum, high signal- to-noise ratio and photometric accuracy requirements, tissue sampling errors, calibration maintenance problems, and calibration transfer problems. The subsystems include an illumination / modulation subsystem, a tissue sampling subsystem, a calibration maintenance subsystem, an FTIR spectrometer subsystem, a data acquisition subsystem, and a computing subsystem.

An optical device and method for fabricating an optical device. The optical device comprising: a semiconductor material comprising an active layer configured to emit light when an electrical current is applied to the device and / or to generate an electrical current when light is incident on the active layer, wherein the semiconductor material comprises a first surface and an opposed second surface, from which light is emitted from and / or received by the device, and wherein the first surface defines a first structure comprising the active layer and configured to reflect light emitted from the active layer toward the second surface and / or to reflect light received by the device toward the active layer, and the second surface defines a second structure configured to permit light incident on the second surface at an angle outside a critical angle range to the planar normal to pass therethrough.

The invention discloses a rotary Fourier transform interference imaging spectrometer, which includes a front collimation objective, a cube corner reflector, a beamsplitter, a rear imaging objective, a detector and a control and processing module, aims to reduce the light energy loss of a target, and has the characteristics of high luminous flux and detection sensitivity. The traditional rectilinear motion scanning manner of a moving mirror is substituted by the rotary scanning manner of the beamsplitter or the cube corner reflector, so as to avoid series of technical difficulties brought by precise rectilinear scanning of the moving mirror; a lateral shear interferometer based on the Michelson interference principle is adopted, and the characteristic of common path is obtained, so that the interference effect cannot be influenced even if the beamsplitter slightly shakes during the rotation; a planemirror in the traditional Fourier transform imaging spectrometer is substituted by the cube corner reflector, so that the problem brought by the inclined planemirror is avoided; therefore, the stability, reliability and vibration and impact resistance of the instrument are improved, and the structure of the spectrometer is more compact.

A compact, optically fast catadioptric imager. In one embodiment, the catadioptric imager of this invention includes a first group of optical elements optically disposed to receive electromagnetic radiation from an object and having positive optical power, a second group of optical elements, optically disposed between the first group of optical elements and an image plane, having at least one optical surface and having positive optical power, a third group of optical elements, optically disposed between the object and the second group of optical elements, having at least one optical surface and having negative optical power, a fourth group of optical elements substantially centered along an optical axis of said second group of optical elements and having negative optical power, and a fifth group of optical elements having positive optical power.

An optical device for projecting an image is disclosed. In one embodiment, the optical device includes a configurable optical diffuser adapted to produce a diffuse optical beam having a temporally varying pattern of angular divergence. The optical device further includes a plurality of lenslet pairs to shape the diffuse optical beam and a spatial light modulator to spatially modulate the shaped optical beam to project an image.

The present invention discloses apparatuses and methods for non-invasive determination of attributes of human tissue by quantitative infrared spectroscopy. The embodiments of the present invention include subsystems optimized to contend with the complexities of the tissue measurements. The subsystems can include an illumination / modulation subsystem, a tissue sampling subsystem, a calibration maintenance subsystem, a data acquisition subsystem, and a computing subsystem. Embodiments of the present invention provide analyte property determination and identity determination or verification from the same spectroscopic information, making unauthorized use or misleading results less likely that in systems that include separate analyte and identity determinations. The invention can be used to prevent operation of automobiles or other equipment unless the operator has an acceptable alcohol concentration, and to limit operation of automobiles or other equipment to authorized individuals who are not intoxicated or drug-impaired.

An optical proximity correction method includes the following steps: acquiring a current correction mask plate figure subjected to at least one time of optical proximity correction, and performing optical simulation on the current correction mask plate figure to acquire a simulation figure; comparing the simulation figure and a target figure to obtain an error of multiple border positions; when the error of the border positions is greater than a preset value and the distance from a to-be-corrected edge of the current correction mask plate figure to an adjacent mask plate figure is greater than the minimum design size of a mask plate, correcting the to-be-corrected edge of the current correction mask plate figure; when the error of the border positions is greater than a preset value and the distance from a to-be-corrected edge of the current correction mask plate figure to an adjacent mask plate figure is equal to the minimum design size of the mask plate, moving outwards an adjacent edge of the to-be-corrected edge of the current correction mask plate figure; and repeating the procedures until the error of the border positions is within the preset value. The method disclosed by the embodiment of the invention improves the efficiency of optical proximity correction.

The present invention relates to an LED retrofit lamp (700) adapted for operation with an alternating current. The LED lamp comprises an LED unit (740), a mains current line, first and second switching devices (710, 720) (e.g., first and second relays), and a control unit (730). The control unit (730) detects an ignition voltage on the mains current line. In response to detecting the ignition voltage on the mains current line, the control unit (730) sets the first and second switching devices (710, 720) to a conducting state such that the LED unit (740) is connected to power. By using the first and second switching devices (710, 720), safety of the LED lamp (700) is improved, in particular when installing the lamp (700) into a fixture designed for fluorescent lamps.

The invention discloses an acousto-optic tunable filter imaging spectrometer which is applied to the field of remote sensing. The invention relates to a hyperspectral imaging technology in the remote sensing field and an integrated system, wherein the technology is a novel method by combining an acousto-optic tunable filter taken as a band selector with area array imaging technology; and the system comprises a pre-optical system, the acousto-optic tunable filter, a post-optical system, an area array detector, a radio-frequency signal generator and a data collecting system. The invention can be applied to various remote sensing fields of ground detection, airborne detection, satellite-borne detection and deep space detection, passively receives reflex of an object to obtain an atlas cube of the object to be detected and can flexibly choose observation wave band by an electric tuning way.

The invention relates to the apparatus for and a method of sensing impact between a vehicle and an object and particularly between a pedestrian and the front bumper (12) of a vehicle. An optical fiber array (14) extends along the bumper (12) and the array (14) has sensors spaced along the bumper (12). A sensor comprises light loss areas spaced peripherally and axially on a fiber. An impact distorts the sensors, modulating light transmitted along the fiber or fibers. A signal is produced which is processed by a signal processor and an output signal generated. The output signal is used to actuate a safety device, such as elevating the vehicle hood to increase clearance between hood and engine, to reduce the severity of any injuries.

The invention discloses a light-emitting device and a projecting system. The light-emitting device comprises a first wavelength converting material layer which is used for absorbing laser light and emitting mixed stimulated light, wherein the first wavelength converting material layer comprises a first face and a second face which are opposite; the first face is used for receiving exciting light; the light-emitting device additionally comprises a first wavelength converting material which is used for absorbing the exciting light and producing first stimulated light, and a second wavelength converting material which is used for receiving at least part of the first stimulated light and producing second stimulated light; the energy transformation efficiency of the first wavelength converting material is higher than that of the second wavelength converting material; and the light-emitting device also comprises an optical film which is positioned on one side of the second face close to the first wavelength converting material layer and is used for reflecting the first stimulated light and the second stimulated light from the first wavelength converting material layer. Compared with a light-emitting device separately using the first or the second wavelength converting material, the light-emitting device disclosed by the invention can obtain higher luminous flux of monochromatic light.

A light emitting diode (LED) based detection system is employed for spectroscopy based applications. LEDs are used as monochromatic light sources for applications at specific and pre-defined wavelengths. Spectrographic information is generated using LEDs of different wavelengths ranging from 260 nm to 1400 nm. Multiple wavelength information is generated by coupling light from each LED into an intensity and mode mixing fiber bundle. A dual beam approach of using a reference and a sample photodiode ensures automatic drift correction. Interference filters at the LED input fiber reduce the spectral bandwidth of the monochromatic light emission to a useful 10 nm bandwidth by cutting off the LEDs trailing emission distribution allowing for absorbance measurements similar to typical spectrometers.

A lighting device comprising a phosphor arrangement (2) having a phosphor region; (31-33), a first laser (5) for irradiating a part of the phosphor region (31-33) with a first laser radiation; wherein the phosphor region (31-33) comprises at least one phosphor which can be irradiated by the first laser radiation and re-emits said first laser radiation at least partly in a manner wavelength-converted into colored light having a first light color; a second laser (6) configured for emitting a second laser radiation having a second light color, wherein the second light color of the second laser radiation is identical in color to the first light color of the wavelength-converted colored light; and wherein the lighting device is configured to simultaneously emit the second laser radiation and the wavelength-converted colored light of identical color emitted by the phosphor.

A substantially uniform distributed illumination pattern of light is generated on and along a symbol to be read by image capture. A solid-state imager is mounted on a tilted printed circuit board in a tilted handle of an ergonomic reader. An imaging lens assembly captures return light over a field of view from the symbol along an imaging axis, and projects the captured return light onto the imager. An illumination light source is mounted on the board for emitting illumination light at an acute angle of inclination relative to the imaging axis. An optical component includes a first lens portion with a polynomial incident surface for intercepting, bending and aligning the emitted illumination light to generate the pattern in a scan direction along the symbol, and a second lens portion with a toroidal or cylindrical aspherical surface for collimating the aligned illumination light to generate the pattern in a transverse direction.

The invention discloses an organic electroluminescent display device, which comprises a glass substrate and an ITO conductive layer arranged on the upper surface of the glass substrate, wherein an anode interface modification layer, a hole transport layer, an electron transport layer, a luminescent layer, a metal cathode Mg layer and a metal cathode Al layer are sequentially arranged on the ITO conductive layer, and the anode interface modification layer is ZnO-doping PEDOT: PSS. The device takes the ZnO-doping PEDOT: PSS as the anode interface modification layer so as to reduce the hole injection barrier of a PEDOT: PSS layer and an ITO interface and improve the composite efficiency of holes and electrons, and meanwhile, the ZnO-doping PEDOT: PSS is also taken as a light scattering layer, so that crystal scattering can increase the luminous flux of the PEDOT: PSS layer, reduces the possibility that total-internal emission occurs among organic layers of a luminescent device, and improves the luminescent efficiency and brightness of organic OLED.

The invention discloses a grade-C halogen lamp. 75 to 85 percent of krypton gas, 6 to 15 percent of dibromomethane, 3 to 7 percent of nitrogen gas and 3 to 7 percent of argon gas are charged into a quartz glass bulb shell, and the charge pressure in the bulb shell is 2.5 to 3.5 atmospheres. Through an optimal halogen gas ratio and an optimal formula of auxiliary gases, the luminous flux of the lamp bulb, under the same conditions (the same voltage and constant lamp filament specifications, shape and size), can be improved by about 15 percent, the actually consumed power of the lamp bulb can be reduced by 5 to 8 percent, the actual life of the lamp bulb can be improved by 30 to 50 percent, and the X-ray shielding capacity of the lamp bulb can be improved by 20 percent. According to the data, under the same conditions, the light efficiency of the lamp can be improved considerably, energy can be saved and radiation can be reduced, so the lamp contributes to environment protection and health of human body.

The invention discloses an infrared spectrum monitoring system based on an MEMS grating light modulator linear array, which comprises a light source, a dispersion element, a grating light modulator linear array, a probe and the like. The light emitted by the light source is incident onto a grating through a collimation system; the light with different wavelengths has different diffraction angles; diffraction light with various wavelengths passes through an imaging system and then is incident onto the programmable grating light modulator linear array; the grating light modulator linear array is operated by applying the voltage to ensure that the grating light modulator linear array has a function of controlling the diffraction states of the light with different wavelengths; and the single point probe arranged on the test surface can orderly acquire the intensity of the light with various wavelengths or the synthetic light intensity of the light with several wavelengths, thereby the infrared spectrum monitoring on detected substances is realized. The system adopts a novel light path system, does not use an expensive infrared detection array, only needs the single point infrared probe, and has the advantages of low cost, small volume, quick response speed, high precision, low power consumption, portable use and the like.

A spectrometer generates Vibrational Circular Dichroism (VCD) measurements having an exceedingly high signal-to-noise ratio, as well as a greater wavelength range over which measurements may be accurately provided. This is achieved by utilizing reflective optics (preferably solely reflective optics, i.e., no refractive elements) to supply a concentrated and collimated input light beam to a sample within a sample cell, and similarly collecting the light output from the sample cell via reflective optics for supply to a detector.

The invention discloses a high-precision method for detecting wave aberration of a system, belonging to the field of optical detection. The method comprises the following steps of: emitting lighting beams by a light source, and generating an ideal spherical wavefront beam through diffraction after entering into a lighting system and a spatial pinhole filter with pinholes; enabling incidence beamsto enter into a detected projection objective, enabling emergent beams with aberration information to generate interference after being diffracted by an optical grating and passing through the spatial filter, acquiring the emergent beams by an image sensor, and carrying out wave surface fitting to obtain an aberration difference; enabling the incidence beams to enter into the detected projection objective through radiating and rotating by 180 DEG to obtain two wavefront measurement results, separating non-rotational symmetry components in system errors by using the characteristic of the Zernike polynomial in a unit circle field, increasing two optical axis exterior point measurements, figuring out the system errors, and subtracting the system errors by a measured value to obtain the actual wave aberration of the detected projection objective. The method for calibrating the system errors of an interferometer in the invention can be used for calibrating the system errors caused by the interferometer and improving the measuring precision of the interferometer.

Provided is a light-emitting device having good binning characteristics with suppressed changes in color derived from shifts in excitation wavelength.The present invention achieves the above object by way of a light-emitting device that comprises a blue semiconductor light-emitting element, and a wavelength conversion member, wherein the wavelength conversion member comprises:a phosphor Y represented by formula (Y1) below and having a peak wavelength of 540 nm or more and 570 nm or less in an emission wavelength spectrum when excited at 450 nm,(Y,Ce,Tb,Lu)x(Ga,Sc,Al)yOz  (Y1)(x=3, 4.5≦y≦5.5, 10.85≦z≦13.4); anda phosphor G represented by formula (G1) below and having a peak wavelength of 520 nm or more and 540 nm or less in an emission wavelength spectrum when excited at 450 nm.(Y,Ce,Tb,Lu)x(Ga,Sc,Al)yOz  (G1)(x=3, 4.5≦y≦5.5, 10.8≦z≦13.4)

A light-emitting diode (LED) bulb comprises a light-permeable bulb shell, an LED luminous source, a stem, a driver and an electric connector, wherein the stem is provided with a support pillar, a horn tube, an exhaust tube and electric lead wires; the bulb shell and the stem are sealed in a vacuum mode, and low-viscosity high-thermal-conductivity gas is filled in the bulb shell; the LED luminous source is composed of at least one transparent LED light-emitting column; the LED light-emitting column comprises a high-thermal-conductivity transparent tube inserted in the outer surface of the support pillar; at least one string of LED chips and a luminescent powder layer are arranged on the surface of the transparent tube; the chips are in series connection or in series-parallel connection, electric lead wires of chip electrodes are connected with the electric lead wires of the stem, a stem electrical connection wire is connected with the output end of the driver, the input end of the driver is connected with the electric connector, and the electric connector is communicated with an external alternating current (AC) or direct current (DC) power supply. The LED bulb has the advantages that thermal resistance between the LED chips and the heat dissipation gas is low, heat dissipation effect is good, an LED bulb with higher luminous flux and higher luminous efficiency can be manufactured, the light-emitting component is firmly fixed, can withstand strong shock, and is high in reliability, and the LED bulb is simple in manufacturing process and low in cost.

The present invention provides a compact, inexpensive fluorescence microscope capable of high-resolution imaging with high light throughput suitable for use in both laboratory and field environments, and methods of use. A simple and inexpensive fluorescence microscope allows health care workers to perform various medical assays at the point of care instead of having to collect and transport biological samples to distant labs, and subsequently return the results to the patient. The microscope of the present invention is also useful for educational use and field use, and other uses as well.

The invention relates to a high-brightness white-light source with an optical waveguide. The high-brightness white-light source is characterized by comprising an excitation light source and an optical waveguide corresponding to the excitation light source, wherein the optical waveguide is provided with an incident port and an emitting port; a white-light excitation body internally provided with fluorescent powder is connected to the emitting port of the optical waveguide; the light emitted by the excitation light source is transmitted through the optical waveguide to excite the fluorescent powder in the white-light excitation body so as to be combined to form the white light. The high-brightness white-light source with the optical waveguide is high in optic-electro conversion efficiency and luminous flux; the fluorescent powder is far from the excitation light source and can be in a deferred degradation without being cooled; the high-brightness white-light source is a compact structure, and is very suitable for the place required for introducing the white light through the optical waveguide.

The invention discloses a light and small interference imaging spectrum full-polarized detection device comprising a preposed optics looking-out system, a static full-light modulation module, an angle shearing static interference imaging spectrometer, an imaging mirror set and a detector which are coaxially and successively arranged in sequence, wherein the detector is connected with a signal obtaining and processing system; after being collected, collimated and performed with stray light elimination by the preposed optics looking-out system, irradiation light emitted by a target source enters the static full-light modulation module; after passing through an angle shearing birefringent crystal set, one beam of modulation line polarized light is sheared into polarization light at an angle; after passing through an analyzer, the polarization light is divided into two beams of line polarized lights; the two beams of the line polarized lights are gathered in the detector after passing through the imaging mirror set; and the received signal is processed by the signal obtaining and processing system to obtain a target image, hyperspectral information and full-polarized information. The invention has the characteristics of compact and simple structure, no moving components and large luminous flux, can obtain a target two-dimensional space image, one-dimensional hyperspectral information and integral polarization information in one time.