1079 results about "Spectrum light" patented technology

The invention discloses a high efficiency incandescent and Compact Fluorescent (CFL) bulb replacement LED lamp having a good color reproduction. The LED light bulb includes two groups of semiconductor light emitters and a luminescent material to emit four different spectrums of light. The two groups of semiconductor light emitters are enclosed around an interior wall of the light bulb housing, which has a plurality of fins at an exterior surface for effective heat dissipation. A high reflective member having a dome shape in the center is disposed under the two groups of semiconductor light emitters to redirect the emission and excitation lights from the two groups of semiconductor light emitters and recycle the backscattered light for multi-spectrum light mixing. The LED-light bulb further includes a single power line connecting to the two groups of semiconductor light emitters and a high efficiency electrical AC/DC conversion and control device. The light bulb has a diffuser dome for an output window and a conventional Edison-mount screw-type light bulb socket, a conventional fluorescent tube coupler arrangement or a conventional halogen MR-16 socket arrangement connecting to an AC power base. If a voltage is supplied to the AC/DC conversion and control device, a mixture light from the diffuser dome produces a warm white light with a color rendering index of at least 85 and a luminous efficacy of at least 80 lumens per watt.

A light source apparatus including light spectrum-converting materials that emit light primarily over large portions of the 360 nm-480 nm and the 590-860 nm spectral range is provided. This apparatus provides a cooled, high-luminance, high-efficiency light source that can provide a broader spectrum of light within these spectral ranges than has been cost-practical by using many different dominant peak emission LEDs. Up to 15% of the output radiant power may be in the spectral range 350-480 nm in one embodiment of this device, unless a specific separate source and lamp operating mode is provided for the violet and UV. Control methods for light exposure dose based on monitoring and controlling reflected or backscattered light from the illuminated surface and new heat management methods are also provided. This flexible or rigid light source may be designed into a wide range of sizes or shapes that can be adjusted to fit over or around portions of the bodies of humans or animals being treated, or mounted in such a way as to provide the special spectrum light to other materials or biological processes. This new light source can be designed to provide a cost-effective therapeutic light source for photodynamic therapy, intense pulsed light, for low light level therapy, diagnostics, medical and other biological applications as well as certain non-organic applications.

The invention provides an all-fiber testing device for testing the polarization crosstalk of an optical device. The all-fiber testing device comprises a wide-spectrum light source (501), a polarizer (511), a to-be-tested polarizing device (522), an optical path correlator (530), a difference detector (550) and a photoelectric signal conversion and signal recording device (560), wherein the wide-spectrum light source (501) is connected with the to-be-tested optical fiber device (522) through the polarizer (511) and a first rotary connector (521) and is connected with the optical path correlator (530) with a polarization beam splitting Michelson structure through a second rotary connector (523); and the optical path correlator (530) is connected with the polarization difference detector (550) through a third rotary connector (541) and is connected with an interference signal detecting and processing device (560). The all-fiber testing device has the advantages of small size, high measurement accuracy, high temperature and vibration stability and the like, so that the all-fiber testing device is widely applied to high-accuracy measurement and analysis of the polarization performance of the optical device.

The invention provides a device and a method for improving polarization crosstalk measurement performance of an optical device. The device comprises a wide spectrum light source (301), a polarizer (311), a polarization device to be tested (632), an optical path correlator (640) and a polarization crosstalk detection and signal recording device (150), wherein the wide spectrum light source (301) is connected with the optical device to be tested (632) by the polarizer (311) and a first rotation connector (631) and then is connected with the optical path correlator (640) by a second rotation connector (633). By the device and the method, noise amplitude can be greatly suppressed, the sensitivity of polarization crosstalk measurement is improved, the dynamic range of polarization crosstalk measurement is expanded, and the device and the method are widely used for high-precision measurement and analysis on polarization performance of the optical device.

The invention provides a space division multiplexing Mach-Zehnder cascade fiber interferometer and a measurement method thereof. The space division multiplexing Mach-Zehnder cascade fiber interferometer is composed of a wide-spectrum light source, a photodetector, a coupler, a single-mode connection optical fiber, an optical fiber sensor, a continuous-variable optical delay device, and a reflector, wherein the optical fiber sensor is composed of a Mach-Zehnder interferometer and forms a cascade optical fiber sensor array or a network. The wide-spectrum light source and a photodetector are connected with the optical fiber sensor through the coupler to form a sensor network; and the sensor network is connected with the continuous-variable optical delay device and the reflector through the coupler and is used for enquiring and demodulating the optical fiber sensor. The space division multiplexing Mach-Zehnder cascade fiber interferometer solves the problem of breakage of the optical fiber sensor array, improves the anti-damage characteristics of the optical fiber sensor array and the network and solves the temperature compensation problem in the measurement process. The space division multiplexing Mach-Zehnder cascade fiber interferometer has the advantages of simple interferometer structure, easy implementation, improved measurement reliability and low cost, and better facilitates the technology generalization and popularization.

A high speed, low cost, wide spectrum light scanning and sensor unit (10) for receiving reflected light from an object and diffracting the light into segments of wavelengths and a linear sensor array (32) having elements positioned to receive the segments and to measure the relative magnitude of such segments to define a spectral distribution of the object together with a digital identifier-controller (36) connected to said sensing device and having a memory for memorizing a spectral distribution of light representing a first standard object, and additional memory for receiving a spectral distributions of other objects and programmable logic circuitry containing a program for determining the similarity between the standard object and the other objects.

What is disclosed is an electroluminescent apparatus comprising: an OLED device emitting light in the blue and green spectrums; and at least one down conversion layer, said down conversion layer absorbing at least part of the green spectrum light and emitting in at least one of the orange spectra and red spectra.

The invention provides a method for detecting on-line a multi-component gas and the testing arrangement for the method. The method comprises the following procedures: the current and temperature are tuned by a semi-conductor laser; after double modulation, the laser emitted from the semi-conductor laser passes an optic-fiber coupler, partial laser reaches to an open multi-optic-path pond, in which the emitted light that is absorbed by the gas to be measured is again transmitted through an optic fiber to a balance receiver; another partial laser from the optic-fiber coupler is also sent into the balance receiver; the signals picked up by the balance receiver is sent into a phaselocking amplifier after passing a pre amplifier, and then sent into a computer for processing after passing an A/D converter. The testing arrangement comprises a modulation signal generator, a laser driver, a laser spectrum light path, a signal conditioning circuit and a computer that are connected in sequence; the computer is additionally connected with the modulation signal generator, and connected with the laser spectrum optic path through a temperature detector/controller. The invention converts the precision controlling of temperature into the precision controlling of temperature, improves the sensitivity and opaqueness of the detection, so as to achieve the simultaneous testing of a plurality of components.

Apparatus and methods to enhance light intensity within useful red to near-infrared spectral ranges, using direct or indirect sunlight, or from other ambient white light, are described. The disclosed devices provide high quantum yield photoluminescent ambient light spectrum conversion to increase the supplied energy primarily in the 590 nm-850 nm spectral range. These devices also pass much of the incident light in the spectral range in which the device's photoluminescent materials emit light, thereby greatly increasing the effective intensity of light available in the targeted 590-850 nm wavelength range. The ambient light conversion devices of the disclosure may be incorporated in apparel, bandage-like patches, converting reflectors, large area converters, awnings, window covers, and other articles, materials, and products. The converted light may be used in therapeutic treatments, horticultural and biotechnological applications, and other applications in which the converted light outputs of the present disclosure are beneficial.

The invention relates to a device and a method for generating microwave signals by using a multi-wavelength Brillouin laser. An existing device obtains a high frequency difficultly. The device of the invention comprises an adjustable narrow-band light source, two isolators, three couplers, an erbium-doped optical fiber amplifier, two optical fiber circulators, a Sagnac loop mirror, an optical fiber Bragg grating and a photodetector. The adjustable narrow-band light source is in optical connection with the isolators; the isolators are in optical connection with the couplers; outputs of the couplers are in optical connection with another coupler respectively; one of optical paths is provided with the erbium-doped optical fiber amplifier, the two optical fiber circulators and the Sagnac loop mirror. The method for generating the microwave signals by using the device comprises the following steps that: pump spectrum light emitted by the adjustable narrow-band light source is split into two paths of pump spectrum light after passing through the isolators and the couplers, one path of the pump spectrum light performs beat frequency with the other path of the pump spectrum light after outputting single-channel high-order Stocks light so as to obtain high-frequency microwave signals. The device and the method change the wavelength of the pump spectrum light to make a multi-wavelength pass band continuously adjustable.

The invention provides a distributed fiber white-light interference sensor array based on tunable Fabry-Perot resonant cavity, which is composed of a duplex photoelectric device, a tunable Fabry-Perot resonant cavity, a single-mode connection fiber and a sensor, wherein the tunable Fabry-Perot resonant cavity is composed of a scanning prism, a self-focusing lens, and a single-mode optical fiber with partial reflection surface; the duplex photoelectric device is composed of a wide-spectrum light source with a common base, an emitter and a collector, a photodetector, and a beam splitter prism; the beam with a certain spectral width is emitted by the light source to the resonant cavity directly through the beam splitter prism and is reflected multiple times by the left and the right surfaces of the resonant cavity to obtain a signal light; and the signal light outputted from the right cavity surface enters the sensor through the single-mode connection fiber, reflected by the left and the right end faces of the sensor, returns along the original path to the resonant, and is outputted from the left cavity surface to the photodetector. The distributed fiber white-light interference sensor array has a common light path structure and has the advantages of good temperature stability, simplest optical fiber path structure, low cost and high practicality.

A tunable-frequency photoelectric oscillation device based on a wide spectrum light source comprises the wide spectrum light source, an optical filter, a first light amplifier, a second light amplifier, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, a first polarization controller, a second polarization controller, a dimming-adjustable delay line, an photoelectric modulator, a color-dispersion optical fiber, a first photoelectric detector, a second photoelectric detector, a microwave amplifier, a first optical fiber patch cord, a second optical fiber patch cord, a third optical fiber patch cord, a fourth optical fiber patch cord, a fifth optical fiber patch cord, a sixth optical fiber patch cord, a seventh optical fiber patch cord, a first cable and a second cable. The tunable-frequency photoelectric oscillation device based on the wide spectrum light source can generate wideband-adjustable microwave signals, adopts a microwave photon filter to replace a traditional point filter, overcomes the defect that a traditional photoelectric oscillator based on wide spectrum source cutting can not generate signals at certain frequency points, and has the advantages of being low in cost, adjustable in wideband, and low in phase noise.

The invention belongs to the technical field of photoelectricity, and provides a super-continuum spectrum light source and a coherent anti Stokes Raman scattering imaging system. The super-continuum spectrum light source comprises a laser which is used for generating laser pulses, and a super-continuum spectrum is generated through laser pulse pumping full-orthochromatic scattered photon crystal optical fibers. Due to the fact that the super-continuum spectrum is generated through the laser pulse pumping full-orthochromatic scattered photon crystal optical fibers, a single pulse is kept in a time domain, good flatness and continuity exist in a frequency domain, and high light spectrum power density is provided. Meanwhile, relative time delay between light spectrum components of different frequency is short, the spectrum consistency is good, and the light spectrum range is wide. Therefore, the super-continuum spectrum produced by the super-continuum spectrum light source is wide in application range.

The invention discloses a difference double-interference type optical fiber gyroscope based on birefringence modulation. The optical fiber gyroscope comprises a light source, a modulator, a coupler, an optical fiber ring, a polarization beam splitter, a first detector and a second detector, wherein the light source and the modulator are welded at a melting point O1 with an angle of 45 DEG; the modulator and a port A of the coupler are welded at a melting point O2 with an angle of 45 DEG; an end C of the coupler and one end of a polarization-maintaining optical fiber ring are welded at a melting point O3 with an angle of 0 DEG; an end D of the coupler and the other end of the optical fiber ring are welded at a melting point O4 with an angle of 90 DEG; an end B of the coupler and an input end of the polarization beam splitter are welded at a melting point O5 with an angle of 0 DEG; and two output ends of the polarization beam splitter are respectively welded to the first detector and the second detector. According to the invention, closed-loop control of the difference double-interference type optical fiber gyroscope is realized; and a wide-spectrum light source with very weak coherent characteristics is adopted, thereby avoiding strong noise brought by various stray wave interferences which are caused by strong coherent characteristics of a laser light source.

In at least one embodiment, brightness multiple LEDs is adjusted by modifying power to subgroups of the multiple LEDs during different times and detecting the brightness of the LEDs during the reductions of power. In at least one embodiment, once the brightness of the LEDs are determined, a controller determines if the brightness meet target brightness values, and, if not, the controller adjusts each LED with the goal meet the target brightness values. In at least one embodiment, a process of modifying power to the subgroups of multiple LEDs over time and adjusting the brightness of the LEDs is referred as “time division and light output sensing and adjusting. Thus, in at least one embodiment, a lighting system includes time division light output sensing and adjustment for different spectrum light emitting diodes (LEDs).

The invention discloses a snapshot integral view field imaging full-polarization hyperspectral detection device. The snapshot integral view field imaging full-polarization hyperspectral detection device is composed of a front optical lens set, an integral view field unit, a collimating lens set, a full-polarization modulation module, a spectrum light splitting module, an imaging lens set, an area array detector and a data collecting and processing system all of which are sequentially arranged in the direction of incident light. Light emitted by a two-dimensional spatial target sequentially enters the front optical lens set, the integral view field unit, the collimating lens set, the full-polarization modulation module, the spectrum light splitting module and the imaging lens set, and finally reaches the area array detector. The data collecting and processing system controls the area array detector to shoot a frame of image to obtain distribution information of hyperspectral images corresponding to polarized components; then the data collecting and processing system extracts and processes data of the frame of image to obtain information of the spatial morphology, the one-dimensional high spectrum and the full Strokes polarization parameter of the detected two-dimensional spatial target. By means of the snapshot integral view field imaging full-polarization hyperspectral detection device, three-dimensional information of the space, the spectrum and polarization can be obtained in real time.

The invention provides a solar simulator light source and a realizing method thereof. The solar simulator light source at least comprises a substrate, a first lighting component and a light filter, wherein the first lighting component comprises a first kind of LED chips, a first kind of package bodies and fluorescent powder filled in the first kind of package bodies and corresponding to the first kind of LED chips. By combining electroluminescence of the LED chips with photoluminescence of the fluorescent powder and selecting the proper type of the LED chips to reasonably match with the broadband-spectrum fluorescent powder, light emitted by the LED chips can trigger the fluorescent powder while being combined with the same to form continuous broadband-spectrum light sources, and the light filter performs spectrum screening to obtain the continuous solar simulator light source good in matching with required application, so that the solar simulator light source can be widely applied to accurate simulation of solar continuous spectrum and realization of a broadband-spectrum near-infrared light source and the like.